Rectal disorder

This early-stage trial is testing an experimental drug called EVOLVE104 in people with advanced bladder cancer or several types of squamous cell carcinoma (lung, esophagus, skin, and others). The study aims to find a safe dose and see if the drug can shrink tumors. It is for pati…

This phase 1 trial tests a new drug called AWT020, given alone or with other cancer treatments, in people with advanced solid tumors such as non-small cell lung cancer, colorectal cancer, kidney cancer, and melanoma. The main goals are to check the drug's safety, find the best do…

This phase 2 trial is testing a two-month course of chemotherapy (mFOLFOX) followed by short-course radiation before surgery for people with resectable rectal cancer. The goal is to see if this approach improves the chance of being cancer-free three years later. About 54 particip…

This phase 2 trial tests a powerful mix of short-course radiation, chemotherapy (mFOLFOX6), an immunotherapy (PD-1 antibody), and a targeted drug (cetuximab or bevacizumab, depending on genetic markers) in people with high-risk rectal cancer that is mismatch repair proficient (pM…

This study tests whether adding an immunotherapy drug (PD-1 antibody) to standard chemoradiation can improve outcomes for people with a rare type of rectal cancer called squamous cell carcinoma. About 20 adults with newly diagnosed, non-spread cancer will receive the combination.…

This Phase 3 trial tests whether adding immunotherapy and a targeted drug to short-course radiotherapy and chemotherapy improves outcomes for people with high-risk rectal cancer. About 204 participants will receive either the standard treatment or the intensified combo. The study…

This study tests whether giving two immunotherapy drugs (botensilimab and balstilimab) before surgery can shrink tumors and improve outcomes for people with advanced colon cancer that can be removed. About 100 adults with stage IIB to IIIC colorectal cancer will receive the drugs…

This phase 2 trial will test whether adding immunotherapy drugs (cemiplimab alone or with fianlimab or REGN7075) to standard chemotherapy (capecitabine and oxaliplatin) can completely eliminate tumors in patients with locally advanced rectal cancer before surgery. The study plans…

This study tests two ways of giving extra radiation after standard chemoradiation to people with early-stage rectal cancer. The goal is to see which method helps more people achieve a complete response, so they can avoid major surgery and keep their rectum. About 131 participants…

This phase II trial tests whether giving a combination of chemotherapy (FOLFOX) and two immunotherapy drugs (botensilimab and balstilimab) before surgery can eliminate rectal cancer without the need for surgery or radiation. The study includes adults with stage II or III rectal c…

This phase 2 trial compares two treatment plans for people with locally advanced rectal cancer that is mismatch repair proficient (pMMR) or microsatellite stable (MSS). One group receives standard short-course radiation followed by chemotherapy. The other group receives a newer a…

This early-phase trial is testing an experimental oral drug called KST-6051 in adults with advanced or metastatic solid tumors that have a KRAS mutation, including certain lung, pancreatic, and colorectal cancers. The main goal is to check the drug's safety and how the body proce…

This study is testing the drug T-DXd (Enhertu) in 100 adults with advanced HER2-positive solid tumors who have already tried other treatments and have no good options left. The goal is to see how well the drug works in real-world settings, including how many patients respond and …

This study tests whether a blood test (ctDNA) can help doctors customize the dose of chemoradiation for people with anal cancer. Depending on how the tumor responds, some patients may get a lower radiation dose to reduce side effects, while others may get a higher dose or an adde…

This trial tests whether close follow-up (active surveillance) is as good as chemoradiotherapy for preventing cancer return after early-stage rectal cancer removal. About 480 adults with intermediate-risk T1 rectal cancer will be randomly assigned to either regular checkups and s…

This study tests a device called ColoSeal ICD that is placed inside the colon after surgery to divert stool away from the surgical connection. The goal is to see if it is safe and feasible in 90 adults with rectal or rectosigmoid cancer. The device stays in place for about 10 day…

This phase I trial tests a surgical procedure called utero-ovarian transposition (UOT) to temporarily move the uterus, ovaries, and fallopian tubes out of the radiation field in women aged 18-40 with pelvic cancers. The goal is to preserve fertility and ovarian function during wh…

This study compares a new treatment approach for high-risk rectal cancer: short-course radiation followed by immunotherapy (toripalimab) and chemotherapy (FOLFOX) versus the standard long-course chemoradiation. The goal is to see if the new approach leads to more complete tumor r…

This pilot study tests two stem cell treatments for anal fistulas in people with Crohn's disease. One uses donor stem cells (Alofisel), the other uses stem cells from the patient's own fat. The goal is to see which works better at closing the fistula. The study plans to enroll 20…

This phase 2 trial tests a new approach for people with locally advanced rectal cancer. Participants first receive a short course of radiation, followed by a combination of immunotherapy (sintilimab and IL-2) and chemotherapy (CAPOX). The goal is to see if this treatment can make…

This study is testing whether active surveillance (watchful waiting) is as safe as surgery for people with low rectal cancer who have a complete response after chemoradiotherapy. About 90 participants will be monitored for 2 years to see how often the cancer returns and whether d…

This study tests whether using a special reinforcing material (SIS) during bowel reconnection after rectal cancer surgery can prevent dangerous leaks. About 966 adults with mid-to-low rectal cancer will be randomly assigned to receive either the reinforced connection or the stand…

This study tests an experimental oral drug, GSK5460025, alone or with other cancer drugs, in adults whose solid tumors have specific genetic changes (dMMR or MSI-H). The goal is to see if the drug can shrink tumors and to check its safety. About 47 people with advanced cancers th…

This study tests whether a lower dose of short-course radiotherapy, combined with chemotherapy and two immune-boosting drugs, works as well as the standard radiation dose for locally advanced rectal cancer. About 122 adults will be randomly assigned to one of two radiation doses,…

This study compares two modern surgical techniques for removing low rectal cancer: transanal total mesorectal excision (taTME) and robot-assisted total mesorectal excision (RTME). Researchers want to see which method leads to fewer complications and less need to switch to open su…

This phase 3 trial is testing whether adding the targeted drugs calderasib and cetuximab to standard chemotherapy can help people with a specific gene mutation (KRAS G12C) in advanced colorectal cancer live longer without their cancer growing. About 477 participants will receive …

This study tests whether two immunotherapy drugs, botensilimab and balstilimab, can shrink or eliminate rectal tumors in people with a specific type of rectal cancer (MMRp/MSS) that usually doesn't respond to immunotherapy alone. About 40 adults with stage II or III rectal cancer…

This study tests a combination of two drugs (fruquintinib and FOLFIRI) in people with advanced colorectal cancer that has spread. It is for those who have already had one prior treatment. The goal is to see if this new combination can help control the cancer longer and with manag…

This phase 2 trial tests a new way to deliver radiation therapy for anal cancer using MRI guidance to adjust doses based on each patient's risk level. About 80 adults with anal squamous cell carcinoma will receive different radiation schedules depending on their tumor risk group.…

This study tests whether a single infusion of a patient's own genetically engineered immune cells (E7 TCR-T cells) can shrink or eliminate HPV-related cancers before the patient receives standard treatment like chemo-radiation or surgery. The trial enrolls 15 adults with advanced…

This study tests a new treatment using a patient's own immune cells, called CAR T cells, that are specially designed to target and kill solid tumor cells while leaving healthy cells unharmed. It is for adults with certain advanced cancers, including lung, colon, pancreatic, ovari…

This study tests a new immunotherapy for people with advanced HPV-related cancers, such as cervical, throat, anal, and penile cancers. Participants receive specially engineered immune cells designed to attack cancer cells carrying the HPV16 virus. The goal is to see if this treat…

This early-phase trial tests a new treatment called NG-350A, a virus designed to stimulate the immune system inside tumors, combined with standard chemoradiotherapy for people with locally advanced rectal cancer. The study aims to see if this combination can improve the chance of…

This study is testing a new surgical stapler, called the Signia circular stapler, in people having left-sided colon, sigmoid, or rectal surgery. The goal is to see if it lowers the chance of a leak where the colon is reconnected. About 137 adults will take part, and the main focu…

This study tests a new drug called INV-8989 in people with advanced solid tumors that have a specific genetic change called KRAS G12D. The trial has two phases: the first finds the safest dose, and the second checks how well the drug shrinks tumors. About 178 adults with cancers …

This study tests whether giving chemotherapy alone before limited surgery works as well as chemotherapy plus radiation for early rectal cancer. The goal is to see if avoiding radiation improves quality of life without harming cancer control. About 250 adults with early-stage rect…

This study compares two common surgical procedures—loop ileostomy and loop colostomy—used as protective stomas after rectal cancer surgery. Researchers want to see which one leads to fewer stoma-related problems within the first 60 days. About 350 patients will be randomly assign…

This study looks at whether giving FOLFIRINOX chemotherapy before surgery helps people with mid or lower rectal cancer that has spread to the liver. The goal is to see if both the rectal tumor and liver spots can be completely removed. About 550 adults will take part, and the mai…

This study tests whether giving chemotherapy after surgery can prevent rectal cancer from returning in people who have a positive ctDNA blood test (a sign of leftover cancer cells). About 103 adults with high-risk rectal cancer will either receive chemo or be observed. The goal i…

This study tests an experimental drug called BLU-924 (SAR449336) in people with advanced pancreatic, lung, or colorectal cancers that have specific KRAS mutations. The drug is designed to block the cancer-driving KRAS protein. The trial will enroll about 265 participants to evalu…

This Phase 3 trial is testing whether a new medicine called PF-08634404, combined with standard chemotherapy, works better than the current treatment Avastin plus chemo for people whose colorectal cancer has spread. About 800 participants who have not had prior treatment for meta…

This study tests whether giving a higher radiation dose to the tumor can help people with early-stage rectal cancer keep their rectum instead of needing surgery. About 25 adults will receive targeted radiation using a special adaptive technique. The goal is to see if this approac…

This study is testing a device called BioHealx, a bioabsorbable implant that is placed in the anal fistula to close the internal opening and allow healing. Researchers will enroll 50 adults with a single anal fistula that has failed previous treatment. The goal is to see if the d…

This study tests whether giving a strong chemotherapy directly to the liver, followed by standard cancer pills and an injection, works better than the standard treatment alone. It is for people whose colorectal cancer has spread mostly to the liver and is no longer responding to …

This phase 2 trial is testing a combination of three drugs (liposomal irinotecan, capecitabine, and enlonstobart) plus a short course of radiation before surgery for people with locally advanced rectal cancer. The goal is to see if this approach can completely eliminate the tumor…

This study tests a new therapy where a person's own white blood cells are collected, genetically modified in a lab to recognize and attack cancer cells with a specific mutation (KRAS G12V), and then infused back. Participants also receive chemotherapy and a drug to boost cell act…

This study tests whether adding a citrus flavonoid tablet (Aimailang) to standard chemotherapy (mFOLFOX) before surgery can shrink tumors more effectively in people with locally advanced rectal cancer that has a specific marker (YWHAB). About 236 participants will be randomly ass…

This study looks at whether giving a drug called somatostatin along with a clear liquid diet for a week after rectal cancer surgery can prevent dangerous bowel leaks as well as a temporary stoma (a bag outside the body). About 72 adults with low or mid rectal cancer will be rando…

This study compares two surgical methods for treating high anal fistulas, a condition where an infected tunnel forms between the anal canal and skin. The trial will enroll 64 adults and measure which surgery leads to better healing and fewer complications. The goal is to find a s…

This study tests a combination of two drugs, nilotinib (a pill) and paclitaxel (given by IV), for people with rare advanced cancers that have not responded to standard treatments. The goal is to see if the drugs can shrink or stop tumor growth. About 82 adults with specific rare …

This study tests whether giving additional chemotherapy to people with stage III colorectal cancer who still have cancer DNA in their blood after standard treatment can prevent the cancer from coming back. About 1,660 participants will be randomly assigned to receive either FOLFI…

This study compares two surgical techniques—IFOC and LIFT—for treating high anal fistula, a tunnel that forms between the anal canal and skin. About 66 adults with this condition will be randomly assigned to one of the two procedures. The main goal is to see which surgery leads t…

This early-phase trial is testing whether people with stage II-III rectal cancer can safely avoid surgery by first receiving chemotherapy and then being closely monitored. The goal is to see if the rectum can be preserved without harming survival. Around 120 participants will be …

This study tests whether adding an immunotherapy drug (sintilimab) to short-course radiation and chemotherapy can improve long-term survival in people with a common type of locally advanced rectal cancer (MSS type). About 130 adults aged 18-75 with stage II/III rectal cancer will…

This early-stage trial tests whether curcumin (the active ingredient in turmeric) can reverse high-grade anal precancerous lesions in people living with HIV. Participants insert curcumin capsules into the anus daily for 14 days. The main goal is to find the safest dose, not yet t…

This Phase II trial tests whether adding a dual immunotherapy drug (iparomlimab/tuvonralimab) to standard chemoradiotherapy can improve outcomes for patients with locally advanced rectal cancer that has a specific genetic profile (pMMR/MSS), which usually does not respond to immu…

This phase 3 trial tests whether adding an immunotherapy drug (HLX10) to standard chemotherapy and radiation before surgery improves outcomes for people with locally advanced rectal cancer. It compares short-course versus long-course radiation, both followed by immunotherapy and …

This early-stage study tests whether a cream made from two HIV drugs (lopinavir/ritonavir) can be safely placed inside the anus to treat high-grade anal growths (AIN 2/3) in people living with HIV. About 21 participants will receive the cream for a few months and be followed for …

This study is testing whether the immunotherapy drug dostarlimab (TSR-042), followed by standard chemoradiation and surgery, can effectively treat advanced mismatch repair deficient (dMMR) solid tumors. About 212 adults with locally advanced dMMR cancers will receive the drug int…

This study tests whether low-risk rectal cancer patients can safely undergo surgery without a temporary stoma (a bag attached to the belly to collect waste). The trial will compare leak rates in 442 patients who either get a stoma or not. If skipping the stoma is shown to be safe…

This phase 2 trial tests whether adding two targeted drugs (tucatinib and trastuzumab) to standard chemotherapy can shrink HER2-positive rectal tumors before surgery. About 37 adults with locally advanced rectal cancer will receive the drug combo for 6 weeks, then continue it wit…

This study tests whether a combination of chemotherapy and radiation (total neoadjuvant therapy, or TNT) can shrink rectal tumors enough so that some patients can avoid surgery and instead be monitored closely. About 400 adults with early-stage rectal cancer will be randomly assi…

This study tests whether taking sildenafil (a drug for erectile dysfunction) daily for 10 months, starting 30 days after surgery, can prevent long-term erectile problems in men treated for rectal cancer with radiation and surgery. The trial includes 188 men aged 18 to 70 who had …

This study tests a new approach for people with a common type of locally advanced rectal cancer. It combines low-dose radiation with an immunotherapy drug (pucotenlimab) and chemotherapy before surgery. The goal is to see if this combination can make the tumor disappear completel…

This study tests a new drug called MDX2001 in people with advanced solid tumors that have spread. The main goals are to check the drug's safety and see if it can shrink tumors. About 285 adults with various cancers like lung, breast, or colon cancer will take part. This is an ear…

This study is testing whether giving radiation therapy along with immunotherapy before surgery can improve outcomes for people with sinonasal or anorectal mucosal melanoma, two rare and aggressive cancers. About 40 participants will receive combination immunotherapy (such as ipil…

This study tests whether adding two drugs (adebrelimab and SHR-8068) to standard chemoradiation helps shrink advanced rectal cancer before surgery. About 165 adults aged 18-75 with resectable tumors will participate. The goal is to see if more patients achieve a complete response…

This study tests a treatment plan for people with low rectal cancer that can be removed with surgery. Participants receive chemotherapy and an immunotherapy drug called tislelizumab before surgery. The goal is to see if this combination can make the cancer disappear completely, a…

This phase 3 trial is testing whether adding the immunotherapy drug pucotenlimab to standard chemotherapy (CAPOX) before surgery can improve outcomes for people with locally advanced rectal cancer. About 556 participants will be randomly assigned to receive either CAPOX plus puco…

This study tests whether patients with a specific type of rectal cancer (dMMR/MSI-H) can safely avoid surgery after immunotherapy. After six rounds of a PD-1 inhibitor, those whose tumors completely disappear will be monitored closely instead of undergoing standard treatments. Th…

This early-phase trial is testing a new way of giving radiation therapy (ultra-fractionated, short course) along with standard chemotherapy for people with locally advanced rectal cancer. The goal is to see if this combination can shrink the tumor enough to avoid surgery. The stu…

This study tests whether adding an immunotherapy drug (anti-PD-1) to standard chemoradiation can better control anal squamous cell cancer and reduce the chance of it coming back. It includes 241 adults aged 18-75 with different stages of the disease, from early to advanced or rec…

This study tests whether adding a short course of radiation to a mix of immunotherapy (iparomlimab and tuvonralimab), a targeted drug (regorafenib), and chemotherapy (CAPOX) can better shrink advanced rectal cancer before surgery. About 88 adults with a specific type of rectal ca…

This phase 3 trial compares two different oral chemotherapy drugs given alongside radiation before surgery for locally advanced rectal cancer. The standard drug, capecitabine, is being tested against a newer drug called TAS-102. The goal is to see if TAS-102 leads to more tumors …

This phase 2 trial is testing a new approach for people with a certain type of locally advanced rectal cancer. The treatment combines short-course radiation (sparing lymph nodes), two chemotherapy drugs (capecitabine and oxaliplatin), and an immunotherapy drug (sintilimab). The g…

This phase II trial is testing whether a high-precision radiation technique called stereotactic body radiation therapy (SBRT) can help control locally recurrent rectal cancer that cannot be surgically removed. The study will enroll 40 adults aged 18-75 with unresectable tumors an…

This study tests two experimental drugs, elironrasib and daraxonrasib, given alone or together, in people with advanced solid tumors that have a specific KRAS G12C mutation. The goal is to see if the drugs are safe and can shrink or control the cancer. About 534 adults with lung,…

This study tests whether combining targeted radiation (SBRT) with an immunotherapy drug (PD-1 antibody) can help people whose rectal cancer has returned and cannot be surgically removed. About 31 adults with a specific type of colorectal cancer will receive the treatment and be f…

This phase 2 trial is testing whether adding a dietary supplement called β-hydroxybutyrate to a standard treatment plan (short-course radiotherapy, immunotherapy, and chemotherapy) can improve outcomes for people with locally advanced rectal cancer. The study will enroll 25 adult…

This early-stage study tests a new experimental drug called PF-07934040, taken as a pill, for people with advanced solid tumors that have a KRAS gene mutation. The trial includes patients with non-small cell lung cancer, colorectal cancer, and pancreatic cancer. Researchers will …

This early-phase study tests a new drug (PLN-101095) alone or with pembrolizumab in adults whose advanced solid tumors have stopped responding to standard immunotherapy. About 124 participants will receive the treatment to check safety and early signs of tumor shrinkage. The goal…

This phase II trial tests whether giving zanidatamab before surgery can shrink tumors in people with HER2+ colorectal cancer. About 38 participants will receive the drug intravenously, then undergo surgery. The study measures how much the tumor regresses and whether cancer return…

This trial is testing whether giving the immunotherapy drug pembrolizumab before surgery can improve outcomes for people with high-risk stage 2 or stage 3 colorectal cancer that has a specific genetic feature called mismatch repair deficiency. About 88 participants will receive p…

This study tests whether putting a person's own intestinal fluid back into their stoma can prevent a common and distressing bowel condition called Low Anterior Resection Syndrome (LARS) after rectal cancer surgery. 160 participants will either receive their own intestinal fluid o…

This study tests whether combining two drugs, lenvatinib and pembrolizumab, can shrink or control advanced anal or rectal cancer that has spread and stopped responding to standard chemotherapy. About 35 adults with this type of cancer will receive the drug combination. The goal i…

This study tests the drug nivolumab in people with advanced rare cancers that have a specific marker (PD-L1). The goal is to see if the drug can shrink or control the tumors when other treatments have stopped working. Up to 28 adults will receive treatment for up to 12 months, an…

This study is testing a robotic device that doctors use through the anus to remove benign growths (polyps, adenomas) from the rectum and sigmoid colon. The goal is to see if the device can remove the entire growth in one piece safely, without causing bleeding or a hole in the bow…

This phase 2 trial is testing whether adding the antibiotic metronidazole to standard therapy can reduce harmful bacteria (F. nucleatum) in rectal cancer patients. About 60 adults with locally advanced rectal cancer will receive either standard treatment plus metronidazole or sta…

This study tests whether adding the immunotherapy drug camrelizumab to standard chemoradiotherapy can make rectal tumors disappear completely in people with a common type of locally advanced rectal cancer. About 44 adults aged 18-75 with tumors within 10 cm of the anus will recei…

This phase 2 study tests a total neoadjuvant therapy approach for stage II or III rectal cancer. Participants receive short-course radiotherapy followed by 9 cycles of mFOLFOX6 chemotherapy before any surgery. The goal is to see how many patients achieve a complete response, mean…

This study is for people with rectal cancer that didn't fully go away after standard chemotherapy and radiation. Researchers want to see if giving a few extra doses of internal radiation (brachytherapy) can finish off the tumor and let patients keep their rectum instead of needin…

This study tests whether adding radiotherapy to a combination of chemotherapy (CAPOX) and an immunotherapy drug (Toripalimab) can improve outcomes for people with a specific type of locally advanced rectal cancer (MSS/pMMR). About 192 participants will receive either the drug com…

This study tests a new hydrogel (ECMT-100) to treat anorectal fistulas—abnormal tunnels between the anal canal and skin. Ten adults with a single high fistula will receive the gel to see if it safely closes the external openings and improves symptoms like incontinence and quality…

This study tests whether adding a targeted drug (surufatinib) to a standard pre-surgery regimen of short-course radiation, chemotherapy, and immunotherapy (toripalimab) can improve outcomes for people with high-risk mid-to-low rectal cancer. About 212 participants will receive on…

This early-phase trial tests whether a short course of radiation followed by chemotherapy can shrink advanced rectal tumors enough to avoid surgery. About 25 people with stage II or III rectal cancer will receive the treatment. The goal is to preserve the rectum and improve quali…

This study tests a new device called EndoTEM, which helps doctors use two instruments at once to remove large polyps from the lower colon. The goal is to see if it is safe and can remove the entire polyp in one piece. Thirty adults with large polyps or early cancer in the rectum …

This phase 2 trial is testing a new approach for people with a specific type of rectal cancer that has spread to a few other spots in the body (oligometastases). The treatment combines short-course radiotherapy, chemotherapy (CAPEOX), and an immunotherapy drug called serplulimab …

This study tests whether a special delayed-connection surgery (Turnbull-Cutait) can help people with low rectal cancer avoid a permanent colostomy bag better than the standard surgery with a temporary stoma. About 520 adults aged 18-75 with rectal cancer will be randomly assigned…

This study tests whether adding the immunotherapy drug pembrolizumab to standard chemotherapy and radiation can improve outcomes for people with early-stage anal cancer. About 23 participants will receive the combination treatment, followed by maintenance therapy. The main goal i…

This study tests a new way of giving three chemotherapy drugs (TAS-102, oxaliplatin, and irinotecan) along with bevacizumab to people with advanced colorectal cancer that has stopped responding to standard treatments. The goal is to see if this approach can control the cancer and…

This study tests whether adding the drug SHR-1701 to standard chemoradiotherapy can completely eliminate tumors in people with advanced rectal cancer before they have surgery. About 48 adults aged 18-75 with a specific type of rectal cancer will receive the treatment over several…

This early-phase trial tests whether MRI-guided adaptive radiation therapy, combined with the chemotherapy drug capecitabine, can safely treat rectal cancer while preserving the rectum. About 22 adults with stage I-III rectal cancer will receive escalating doses of radiation guid…

This study tests a new treatment plan for people with high-risk rectal cancer that hasn't spread. Patients get a short course of radiation, then a mix of chemotherapy and immunotherapy before considering surgery. If the cancer disappears completely, patients may choose a 'watch a…

This phase 2 trial is testing whether adding a probiotic called Probio-M9 to standard chemoradiation and an immunotherapy drug (tislelizumab) can improve outcomes for people with locally advanced rectal cancer. About 50 participants will be randomly assigned to receive either the…

This study is for people with a certain type of locally advanced rectal cancer (pMMR/MSS) that often doesn't respond well to immunotherapy alone. The trial combines an immunotherapy drug (serplulimab) with chemotherapy (CAPEOX) and an anti-inflammatory drug (celecoxib) to see if …

This phase 2 trial tests whether giving a combination of chemotherapy (oxaliplatin and capecitabine) and the immunotherapy drug tislelizumab before surgery can shrink or eliminate tumors in people with locally advanced rectal cancer. About 35 participants will receive three cycle…

This study tests a personalized, stage-based approach to treat rectal cancer while trying to avoid removing the rectum. 200 participants will receive either experimental chemoradiotherapy or minimally invasive surgery depending on their cancer stage. The goal is to preserve the r…

This phase 3 trial is testing whether a powerful chemotherapy combination (mFOLFOXIRI plus bevacizumab) can be used instead of standard chemoradiation before surgery for people with high-risk locally advanced rectal cancer. The goal is to see if this approach can reduce the chanc…

This phase 2 trial is testing whether a short course of radiation followed by two cycles of chemotherapy (CAPOX) plus an experimental immunotherapy drug (QL1706) can help people with rectal cancer that has spread to the liver. The study will enroll 42 adults aged 18-75 who have n…

This study tests an experimental drug called SMP-3124LP, which is a liposomal (fat-encapsulated) version of a cancer-fighting compound. It is for adults with advanced solid tumors that have not responded to standard treatments. The trial has two parts: first, finding the safest d…

This study tests whether adding the immunotherapy drug cemiplimab to standard chemotherapy can shrink advanced bile duct tumors enough for surgery. About 20 adults with locally advanced, inoperable bile duct cancer will receive the combination treatment. The main goal is to see h…

This study tests a combination of three drugs (trastuzumab-deruxtecan, capecitabine, and bevacizumab) as a first treatment for people with HER-2 positive colorectal cancer that has spread or cannot be removed by surgery. The goal is to see how well the drugs shrink tumors. About …

This study tests whether a special MRI-guided radiation machine (MR-linac) can deliver high-dose radiation precisely to rectal tumors, allowing patients to avoid surgical removal of the rectum. About 100 people with early-stage rectal cancer will receive this radiation along with…

This study tests whether adding the drug epacadostat to standard chemoradiation helps treat locally advanced rectal cancer before surgery. About 49 adults with stage 2 or 3 rectal cancer will receive short-course radiation, chemotherapy, and epacadostat. The goal is to find the b…

This study is testing a new way to treat moderate-to-severe hemorrhoids by combining a laser procedure with a stitch technique. About 100 adults will receive the treatment and be followed for a year. The goal is to see if it reduces pain, bleeding, and tissue prolapse better than…

This study compares two surgical methods for treating a complex type of anal fistula (an abnormal tunnel from the anus to the skin). The goal is to see which surgery has a lower chance of the fistula coming back and which has a lower risk of causing bowel control problems. About …

This study is for people with locally advanced rectal cancer. It tests whether using MRI scans early after chemotherapy can help doctors choose the best next step: surgery or more chemo with radiation. The goal is to improve cancer control and reduce side effects. About 1,075 par…

This study tests whether two drugs, botensilimab and balstilimab, can clear remaining cancer DNA in people with colorectal cancer who still have signs of disease after standard treatments like surgery and chemotherapy. About 284 adults with a specific type of colorectal cancer (M…

This early-phase trial is testing whether giving chemotherapy first, followed by a higher-than-usual dose of MRI-guided radiation, can eliminate tumors in people with locally advanced rectal cancer. The goal is to see if this approach is safe and can lead to a complete response, …

This study compares giving chemotherapy before surgery versus after surgery for people with locally advanced rectal cancer who have a low risk of the cancer coming back in the same area. The goal is to see which timing helps patients live longer without the cancer returning. Abou…

This pilot study tests whether using artificial intelligence to adjust radiation plans daily can better target tumors while sparing healthy organs in people with locally advanced anal cancer. Twenty participants will receive standard radiation over six weeks, but each day's plan …

This study tests a new treatment called CHM-2101 for people with advanced gastrointestinal cancers (stomach, colon, rectal, or neuroendocrine tumors) that have stopped responding to standard therapies. The treatment uses the patient's own immune cells, which are modified in a lab…

This study tests whether placing live probiotic tablets into the unused part of the gut during a temporary ileostomy can improve bowel function after the stoma is reversed. 156 adults with ultra-low rectal cancer who had sphincter-saving surgery will be randomly assigned to a low…

This phase 3 trial tests whether adding modulated electro-hyperthermia (mEHT) to standard treatment helps shrink locally advanced rectal cancer. About 126 adults will receive either standard therapy alone or with mEHT twice a week for six weeks. The goal is to see if the heat-bas…

This study tests a new surgical technique called Q-ISR for people with ultra-low rectal cancer. It compares Q-ISR to two standard surgeries to see if it can better preserve bowel function while still controlling the cancer. About 100 adults with small tumors near the anal opening…

This study is testing whether adding leucine, a common amino acid found in food, to standard chemoradiotherapy can help shrink tumors more effectively in people with locally advanced rectal cancer. The researchers believe leucine may interfere with cancer cells' ability to repair…

This phase 2 trial tests whether adding an immunotherapy drug (PD-1 antibody) and a blood vessel blocker (bevacizumab) to standard short-course radiotherapy and chemotherapy can improve outcomes for people with a common type of locally advanced rectal cancer (pMMR/MSS). About 86 …

This study tests a new treatment for people with locally advanced rectal cancer that has not spread. The treatment combines short-course radiation, chemotherapy, and two immunotherapy drugs (iparomlimab and tuvonralimab). The goal is to see if this approach can shrink the tumor e…

This study tests whether using chemotherapy alone before surgery works as well as chemotherapy followed by radiation for people with locally advanced rectal cancer. About 540 adults with stage T3 or node-positive rectal cancer will take part. The goal is to see if avoiding radiat…

This phase 2 trial is testing a new approach for patients with a specific type of locally advanced rectal cancer (MSS-type). Participants will receive a short course of radiation, followed by chemotherapy combined with two additional drugs: serplulimab (an immunotherapy) and beva…

This clinical trial is testing whether adding the immunotherapy drug tislelizumab to standard chemoradiation helps people with locally advanced rectal cancer. The study involves 375 participants who will receive either the combination or standard treatment alone. The main goal is…

This trial is testing whether a quick lab test during surgery can help some people with low rectal cancer avoid a major operation. After radiation therapy, patients with a good response undergo a small local excision. If the frozen section shows no deep cancer, they skip the larg…

This phase 3 trial compares standard versus higher-dose radiotherapy, combined with chemotherapy, in 162 people with early low or mid rectal cancer. The goal is to see if a higher dose helps more patients achieve a complete response and avoid surgery, preserving their rectum. Par…

This program provides retifanlimab, an immunotherapy drug, together with standard chemotherapy (carboplatin and paclitaxel) to adults with advanced squamous cell carcinoma of the anal canal who cannot join other clinical trials. The goal is to offer a potential treatment option w…

This phase 2 trial tests a new treatment for early-stage rectal cancer that has not spread to lymph nodes. Instead of radiating the whole pelvis, doctors give a short course of radiation only to the tumor, followed by chemotherapy and an immunotherapy drug. The goal is to shrink …

This study tests whether a new biological mesh (OviTex) works better than the standard synthetic mesh for women having robotic surgery for pelvic organ prolapse. About 184 participants will be followed to compare complications and symptom relief. The goal is to find a safer and m…

This study is testing a simple blood test that looks for tumor DNA from HPV-related cervical and anal cancers after radiation treatment. The goal is to see if this test can replace expensive imaging scans and help doctors find early signs of cancer returning. If the test is posit…

This phase 2 trial compares two types of radiotherapy (short-course vs long-course) given alongside immunotherapy (Adebrelimab) and chemotherapy before surgery for locally advanced rectal cancer. The goal is to see which approach leads to a higher rate of complete tumor disappear…

This early-phase study tests whether giving extra, MRI-guided radiation after standard treatment is safe and effective for people with rectal cancer. About 37 participants will first receive standard chemoradiation, then get additional radiation that adjusts every two weeks based…

This study tests whether adding a special medical food that restricts certain amino acids (NEAAR) to standard cancer therapy (radiation and chemotherapy) is safe and tolerable for people with locally advanced rectal cancer. About 30 adults will participate. The goal is to see if …

This study looks at how well the drug dostarlimab works and how safe it is for people with a certain type of advanced rectal cancer (dMMR/MSI-H). About 50 adults with stage II or III rectal cancer will receive dostarlimab before any other treatment. Researchers will track tumor s…

This study compares two standard treatment approaches for older adults (age 70+) with locally advanced rectal cancer. The goal is to see which approach helps people live longer and with fewer side effects. About 230 participants will be randomly assigned to receive either convent…

This phase 3 trial tests whether adding contact X-ray brachytherapy (a precise, high-dose radiation) to standard chemotherapy and radiation can help people with intermediate-stage rectal cancer keep their rectum instead of needing surgery to remove it. The study will enroll 212 a…

This study is testing whether people with early- or intermediate-stage low rectal cancer can safely avoid major surgery if their tumor responds well to chemotherapy and radiation. Instead of removing the rectum, doctors will closely monitor patients using a "watch-and-wait" appro…

This study tests a new step before rectal cancer surgery: temporarily blocking the main artery to the lower colon with a tiny coil. The idea is to 'precondition' the tissue so it handles surgery better, potentially reducing leaks and other complications. 30 patients with rectal c…

This early-phase trial tests whether injecting special cells from human umbilical veins (E-CEL UVEC) can safely help heal simple anal fistulas after surgery. The study involves 39 adults who are already scheduled for fistulotomy. Researchers will monitor for side effects over two…

This study follows 275 Crohn's disease patients in Japan who receive darvadstrocel, a stem cell injection, for complex anal fistulas. Researchers will monitor side effects and whether fistulas close over 36 months. The goal is to see if this treatment is safe and works in real-wo…

This study tests a new treatment called RD2 Ver.02, a gel made from a patient's own blood, for healing anal fistulas. About 110 adults with certain types of fistulas will receive either the gel or a saltwater placebo after the fistula is cleaned and stitched closed. The main goal…

This trial tests a temporary bypass device called CG-100 in 250 rectal cancer patients undergoing surgery. The device is placed inside the bowel to protect the surgical connection, potentially reducing the need for a temporary stoma. Researchers will compare stoma rates and compl…

This study is for people with advanced gastrointestinal cancers that are growing despite immunotherapy. Researchers want to see if adding targeted radiation to one tumor can help the immune system attack other tumors throughout the body. About 28 participants will receive radiati…

This early-stage study is testing a new treatment called CEA-targeted CAR-T cells for people with advanced solid tumors like lung, stomach, colon, rectal, esophageal, or pancreatic cancer that have not responded to standard therapies. The treatment uses a patient's own immune cel…

This study is for people with locally advanced rectal cancer that hasn't spread. It tests whether adding an immunotherapy drug (PD-1 inhibitor) to a standard treatment plan (short-course radiation plus chemotherapy and targeted therapy) can lead to a complete disappearance of the…

This study is for people with early-stage anal cancer. It tests whether skipping radiation to the groin (when scans and biopsies show no cancer there) works just as well as giving it, while causing fewer side effects and better quality of life. About 45 participants will receive …

This study tests a new drug called LCB84, which targets a protein (TROP2) found on many cancer cells and delivers a toxic payload directly to them. It is being tested alone and together with an immunotherapy drug (anti-PD-1) in 300 people with advanced solid tumors that have not …

This phase 2 trial is testing a powerful mix of radiation, chemotherapy, immunotherapy, and targeted therapy in 44 patients with locally recurrent rectal cancer that has not responded to prior treatment. The goal is to shrink tumors and enable surgery. Researchers are measuring h…

This study compares two types of robotic surgery for rectal cancer: single-port (one small incision) and multi-port (several incisions). Researchers want to see which approach is safer and leads to fewer complications. Forty adults with rectal cancer will take part, and the study…

This early-stage trial is testing an experimental drug called LB1410, a bispecific antibody designed to block two immune checkpoints (PD-1 and TIM-3) and help the immune system fight cancer. It involves 100 adults with advanced solid tumors or lymphoma who have exhausted standard…

This study looks at how long a soft silicone loop (seton) should remain in the fistula tract to treat anal fistula in children aged 0-18. The loop is placed under anesthesia to drain infection and allow healing without cutting the muscle. The goal is to find the best timing to pr…

This study tests A2B395, a donor-derived CAR T-cell therapy designed to target cancer cells while sparing healthy ones. It is for adults with advanced solid tumors like colorectal, lung, or breast cancer that have lost a specific immune marker. The trial has two phases: first to …

This phase II trial tests whether adding immunotherapy and a COX-2 inhibitor to standard chemoradiotherapy can improve complete remission rates in people with locally advanced rectal cancer that is microsatellite stable (MSS). About 138 participants will receive either long-cours…

This study tests whether adding the immunotherapy drug pucotenlimab to standard chemoradiation can improve outcomes for people with locally advanced rectal cancer. About 68 participants will receive the combination, and doctors will check if the tumor disappears completely. If it…

This study is testing whether people with rectal cancer who have a complete response to initial therapy can safely avoid surgery and instead be closely monitored. Researchers will track 200 participants to see how often the cancer stays away or comes back. The goal is to preserve…

This study is testing whether giving two drugs (encorafenib and cetuximab) before surgery can shrink tumors in people with a specific genetic mutation (BRAF V600E) in colon or upper rectal cancer. About 30 participants will receive the drugs for 6 weeks before their planned surge…

This phase II trial tests whether adding an immunotherapy drug (serplulimab) and a COX-2 inhibitor (celecoxib) to standard chemoradiotherapy can improve outcomes for people with locally advanced rectal cancer. 138 participants will receive either long-course or short-course radia…

This phase 3 trial tests whether giving a specific chemotherapy combination (mDCF) before standard chemoradiotherapy can improve outcomes for people with locally advanced anal cancer. About 310 adults with stage T3-4 or N1 anal cancer will be randomly assigned to either standard …

This trial tests a less invasive surgical technique for complex perianal fistula, a painful condition. The new approach uses lower power and causes less tissue damage. Researchers will compare healing rates, pain, and quality of life in 40 adults over six months.

This study is testing whether a new type of CT scanner, called photon-counting detector CT (PCD-CT), can determine how far rectal cancer has grown as accurately as MRI. About 200 adults with rectal cancer will get both a standard MRI and the new CT scan, and doctors will compare …

This study is testing a smartphone app that lets rectal cancer patients log their bowel symptoms daily. The goal is to create a better tool for doctors to understand and manage these symptoms. About 158 participants who had rectal surgery or are on a watch-and-wait plan will use …

This study tests whether a stool DNA test (mt-sDNA) can accurately detect polyps or cancer in people who have already been treated for stage I-III colorectal cancer. Researchers will compare the stool test results to colonoscopy findings in 50 survivors. The goal is to see if the…

This study is testing a new device that combines ultrasound with photoacoustic imaging to look at rectal tumors. The goal is to see if it can more accurately tell whether a patient's cancer has completely responded to pre-surgery treatment. If it works, doctors could avoid operat…

This study is developing a blood test that uses tiny particles called exosomes and machine learning to detect colorectal cancer in people under 50. The test looks for specific microRNA patterns in the blood. Researchers will compare results from 400 people—some with cancer and so…

This early study tests a special PET/CT scan that uses a modified tryptophan molecule to make tumors light up more clearly than normal tissue. About 24 adults with brain, breast, neuroendocrine, or rectal cancers will get one scan to see if this method helps doctors tell tumors a…

This study is testing a new type of PET scan that uses special probes to highlight digestive system cancers, such as stomach, liver, colon, and pancreatic cancers. Researchers will enroll 400 adults to see how well this imaging method finds tumors and tracks their response to tre…

This study looks at different screening methods to find anal precancer in people at high risk, such as those with weakened immune systems or a history of certain genital cancers. Researchers will compare tests like high-resolution anoscopy, HPV testing, and cell samples to see wh…

This study looks at whether people who have had 1 or 2 small, non-cancerous polyps removed can safely wait 10 years for their next colonoscopy instead of the usual 5 years. About 9,500 adults aged 45-69 will be randomly assigned to one of two schedules: a colonoscopy at 5 and 10 …

This study is testing whether rinsing the rectal cavity with a saltwater or iodine solution during laparoscopic surgery can prevent local recurrence of mid-to-low rectal cancer. About 1,600 patients will be randomly assigned to receive the wash or not, and they will be followed f…

This study tests whether a special algorithm called PAGODA can reduce unplanned delays during FOLFOX chemotherapy for gastrointestinal cancers like colon, stomach, and esophageal cancer. About 420 participants will be randomly assigned to either standard care or the algorithm-gui…

This study tests whether cancer patients can complete a supervised exercise program from home using video calls. The program includes resistance training with dumbbells and aerobic exercise. Researchers want to see if this approach is practical and helps patients maintain functio…

This study tests whether eating only within an 8-hour window (time-restricted eating) can improve how well cancer treatments work and reduce side effects. It involves 100 Alaska Native and American Indian patients with breast or rectal cancer. Participants will follow the eating …

This study tests whether taking omega-3 fish oil capsules and doing simple resistance exercises with elastic bands can help cancer patients maintain muscle mass and strength. It involves 288 adults with various cancers who are at risk of muscle wasting. The goal is to improve phy…

This study tests whether a small nerve stimulator placed on the skin near the ankle can help people who have bowel leakage after rectal cancer surgery. Half of the 84 participants will use the active device at home, while the other half will use a sham device. Researchers will ch…

This study tests whether a high-protein nutrition plan combined with resistance exercises, started weeks before surgery and continued for 24 weeks after, can help older adults with cancer preserve their physical function. The trial enrolls Veterans aged 55 and older with certain …

This study tests a personalized self-management program to help cancer survivors on immune checkpoint inhibitors better handle side effects and reduce anxiety or depression. About 400 adults with breast, colon, lung, skin, or rectal cancer who recently started immunotherapy will …

This pilot study tests whether brodalumab, a drug used for autoimmune conditions like psoriasis, can safely reduce immune-related side effects caused by cancer immunotherapy. About 11 adults with advanced solid tumors who developed these side effects will receive brodalumab injec…

This study tests whether an intensive follow-up program can improve bowel control and quality of life for people who have had rectal cancer surgery. About 140 adults who had surgery and a temporary colostomy will be split into two groups: one gets the intensive program with extra…

This study compares two approaches to supportive cancer care for nearly 3,000 adults with cancer. One group gets information through email or their health record, while the other works one-on-one with a lay health worker over 12 months. The goal is to see which model better impro…

This phase 2 trial tests whether a vaginal DHEA suppository can safely improve vaginal health in 25 women who had radiation for gynecologic, anal, or rectal cancer. Radiation often causes dryness, burning, and pain, similar to menopause. DHEA is a hormone replacement that may hel…

This study compares a bowel management program that includes a retrograde rectal enema (RRE) against standard medical care (fiber, loperamide, pelvic floor therapy) for people with low anterior resection syndrome (LARS) after rectal cancer surgery. Researchers will enroll 80 adul…

This study tests whether a special dressing (Mepilex Lite) placed inside the anal canal, combined with a pain-relieving suppository (indomethacin), can better treat acute radiation dermatitis—painful, red, or ulcerated skin—caused by radiotherapy for rectal cancer. About 274 adul…

This study is testing a jelly-based nutritional supplement in 52 people with head and neck, lung, or rectal cancer who are receiving standard cancer treatments like chemo or radiation. The supplement contains ingredients like arginine, omega-3, and olive oil, and is taken twice d…

This study tests whether online interactive videos that guide core muscle exercises can improve bowel symptoms, psychological distress, and quality of life in people who have had rectal cancer surgery. About 110 adults with stage I-III rectal cancer will be assigned to either a g…

This study tests a shorter course of radiation (39 Gy in 13 sessions) to relieve symptoms like bleeding and pain in 50 adults with rectal cancer who cannot have surgery due to age, other illnesses, or cancer spread. The goal is to see if this approach improves comfort and quality…

This study is for women with anal cancer who need pelvic radiation. It tests whether using a vaginal dilator during each radiation session can reduce the risk of vaginal narrowing (stenosis) after treatment. Half of the 60 participants will use the dilator during radiation, and t…

This study looks at whether adding pelvic floor physical therapy before standard radiation treatment can help reduce pain and sexual problems in women with cervical, vaginal, vulvar, uterine, or anal cancer. About 20 participants will receive education on using a vaginal dilator …

This study explores whether acupuncture can reduce nerve pain and numbness caused by chemotherapy in people with gynecologic, urologic, or rectal cancers. About 75 participants will be randomly assigned to receive real acupuncture, sham acupuncture, or usual care for 6 weeks. The…

This study tests whether using virtual reality (VR) can reduce severe belly pain and improve quality of life in people with digestive tract cancers. 360 participants will be split into three groups: one using a skills-based VR program, one using distracting VR videos, and a contr…

This study tests a newer type of radiation therapy that adjusts to daily changes in a patient's body shape. The goal is to safely use smaller treatment areas to reduce side effects like bladder and bowel problems. About 280 adults with pelvic cancers (prostate, bladder, rectal, a…

This study tests whether a daily probiotic pill (Pendulum Glucose Control) can safely reduce stomach and bowel problems in people receiving radiation for cancers of the pelvis, such as prostate, gynecologic, or lower GI cancers. About 20 adults will take the probiotic during thei…

This study tests a program called CARES that provides nurse navigators and counselors to rural cancer patients. The goal is to see if this support helps patients start and finish treatment more quickly and improves their quality of care. About 320 adults with solid tumors like lu…

This study tests a nerve block called ganglion impar neurolysis to see if it can reduce pain caused by radiation therapy for anal cancer. Five adults with localized anal cancer who are getting chemotherapy and radiation will receive the nerve block. Researchers will track pain sc…

This study looks at whether wrist-ankle acupuncture can reduce pain after perianal surgery. About 58 adults with moderate to severe pain will receive this acupuncture along with standard care. Researchers will measure pain relief and how often extra pain medicine is needed.

This study tests whether fecal microbiota transplantation (FMT) – taking donor gut bacteria in capsules – can prevent or reduce gastrointestinal symptoms like nausea, vomiting, and diarrhea caused by chemotherapy or targeted therapy. It involves 90 adults with advanced (Stage IV)…

This study compares two surgical methods (Parks and Bacon) for ultra-low rectal cancer to see which one leads to better bowel function and quality of life a year after surgery. About 256 adults with rectal cancer will take part. The goal is to help doctors choose the best techniq…

This study looks at whether eating only during certain hours of the day can reduce side effects from cancer treatment and improve mood and behavior. About 175 adults with colorectal or breast cancer will follow a time-restricted eating plan while receiving standard therapy. Resea…

This study tests a device that maps pelvic nerves during rectal cancer surgery. The goal is to help surgeons avoid damaging nerves that control bladder, bowel, and sexual function. About 44 adults with rectal cancer will be monitored during surgery and followed for three months t…

This study looks at whether people with rectal cancer can stick to a ketogenic diet (very low carbs, high fat) during chemoradiation. About 194 participants will be randomly assigned to either the ketogenic diet or a standard Mediterranean diet for 5 weeks. The main goal is to se…

This study looks at whether having a healthcare provider directly contact close relatives of people with newly diagnosed colorectal cancer leads to more genetic testing than having the patient share the information themselves. About 4,186 patients and their relatives will take pa…

This study is building a huge registry of information and biological samples from adults with or at risk for many types of cancer, as well as healthy volunteers. Researchers will use this resource to study what causes cancer and how to better prevent, detect, and treat it. The re…

This study is observing 300 women with female sexual organs who are receiving radiotherapy for certain cancers. Researchers want to understand why some patients have more sexual side effects than others. They will track sexual quality of life and look at radiation doses to find p…

This study is testing whether special PET-MRI scans can predict how well rectal cancer responds to chemotherapy and radiation before surgery. Researchers will scan 50 patients multiple times during treatment to see if early changes in the tumor can forecast the final outcome. The…

This study is looking at how short-course radiation therapy (5 days of treatment) affects the immune system in people with rectal cancer. Researchers will collect blood, stool, and tumor tissue samples before, during, and after radiation to study these changes. The goal is to bet…

This study aims to safely collect health information like heart rate and activity levels from cancer patients using devices like smartphones and wearables. Researchers will use this data to learn more about how it relates to cancer diagnosis, treatment response, and risk factors.…

This study aims to collect medical data and biological samples (blood, urine, stool, and tissue) from up to 4,000 adults with known or suspected gastrointestinal diseases. Participants receive standard medical care at the NIH, and any extra samples or leftover tissue from procedu…

This study looks at whether the types of bacteria in the gut and surrounding tissues can help predict how rectal cancer will progress. Researchers will collect stool, tissue, and fat samples from 100 people with rectal cancer and compare them to healthy controls. The goal is to f…

This study follows 50,000 people with colorectal, small bowel, or anal cancer to learn why some respond better to treatment than others. Researchers will collect data on genetics, lifestyle, and side effects to improve care for all patients, not just those in clinical trials. Par…

This study looks at whether preserving the left colic artery during colon or rectal cancer surgery helps keep the remaining colon well-supplied with blood. Surgeons will temporarily clamp the main artery and use a green dye to measure blood flow. The goal is to see if this techni…

This study follows 1,000 adults who have long-term bladder or bowel problems from past cancer radiation and are receiving hyperbaric oxygen therapy (HBOT). Researchers want to learn which patients improve most and when treatment works best. The goal is to better understand how to…

This study collects blood and tissue samples from 200 adults with HIV and certain cancers (like Kaposi sarcoma, lymphoma, or anal cancer) to help researchers understand how HIV and cancer are connected. Participants donate samples, which are stored for future research. There is n…

This study aims to learn more about how the body responds to standard treatments for rectal cancer, including chemoradiation and chemotherapy. Researchers will analyze participants' blood, tissue, and scans to see if these tests can predict whether the cancer improves, worsens, o…

This study looks back at 483 patients who had small rectal neuroendocrine tumors (less than 2 cm) removed using one of two endoscopic techniques: endoscopic submucosal dissection (ESD) or endoscopic partial muscle resection (EPMR). The goal is to compare how often each method lea…

This study is testing a new single-port robotic system for colorectal surgeries, such as for cancer or rectal prolapse. The goal is to see if it is safe and works as well as current multi-port robots. About 25 adults will take part, and researchers will track complications and re…

This study is for Black adults newly diagnosed with gastrointestinal cancer. It focuses on ensuring patients receive proper biomarker testing and evidence-based care, helping them find and join clinical trials if they choose, and providing easy-to-understand information about the…

This study looks at how rectal cancer patients and their doctors decide between three effective treatment options. Researchers want to understand what factors—like age, income, or personal values—influence these choices. About 192 patients and their doctors will fill out question…

This study looks at whether letting people collect their own anal samples at home can increase the number of high-risk individuals who follow through with clinic appointments for anal cancer screening. About 572 participants from Chicago, Houston, and Milwaukee will either self-s…

This study looks at why some people who had surgery for colorectal cancer develop lasting bowel issues like urgency or leakage. Researchers will compare 145 participants with and without these problems using advanced tests. The goal is to identify different types of bowel dysfunc…

This study looks at how immunotherapy drugs (anti-PD-1) affect bone strength in people being treated for cancer. Researchers will measure bone density and blood markers over a year in 25 patients. The goal is to understand if these treatments increase fracture risk, so doctors ca…

This study is building a smart model that uses scans, gut bacteria, and blood tests to see if rectal cancer patients can safely avoid surgery after initial treatment. Researchers will follow 869 patients to find out who can use a 'watch-and-wait' approach instead of an operation.…

This study looks at 200 adults with rectal cancer who had chemoradiotherapy and then chose organ-preserving treatment. Some had a small local surgery to remove the scar, while others did not. Researchers will compare bowel, bladder, and sexual function between the two groups over…

This study looks at tiny particles called exosomes in the blood of 30 adults with rectal cancer who are getting chemotherapy and radiation before surgery. The goal is to see if changes in these particles can predict how well the tumor responds to treatment. This is an observation…

This study looks at sexual and gynecological problems that women may face after finishing treatment for rectal cancer. Researchers will survey 15 women in remission about their symptoms using standard questionnaires. The goal is to better understand these long-term effects and id…

This study looks at anal cancer risk in men who have sex with men (MSM) who take PrEP to prevent HIV. Researchers want to find out how common high-grade anal lesions are, how well anal swabs detect them, and how these lesions affect quality of life. About 296 participants will an…

This study is gathering blood and tumor samples from 1,200 people with colorectal cancer who are having surgery to remove their cancer. Researchers want to look for biomarkers that might help predict how well patients do after surgery. The study does not test a new treatment, but…

This international study aims to understand why colorectal cancer is becoming more common in people under 50. Researchers will compare the diet, lifestyle, and medical history of 2,300 participants—half with early-onset colorectal cancer and half healthy volunteers. The goal is t…

This study collects tissue, blood, and stool samples from 200 children with inflammatory bowel disease (IBD) or other gut disorders. Researchers will use a cutting-edge technique called spatial transcriptomics to map gene activity directly inside gut tissue. The goal is to better…

This study is testing a new blood test that looks for tiny bits of cancer DNA to see if it can predict how well treatment works for people with advanced rectal cancer. Researchers will collect blood and tissue samples from 60 patients before, during, and after treatment. The goal…

This study is testing whether an artificial intelligence (AI) system can analyze MRI scans to predict how well rectal cancer responds to chemotherapy and radiation before surgery. Researchers will enroll 1,700 adults with locally advanced rectal cancer. The goal is to help doctor…

This study aims to improve how doctors tell the difference between real tumor growth and pseudoprogression (a harmless, temporary increase in tumor size) after immunotherapy for rectal cancer. Researchers will use multiple MRI scans and blood tests from 300 participants to build …

This study is collecting blood, urine, tissue, and stool samples from 250 people with locally advanced rectal cancer who are about to receive chemotherapy and radiation before surgery. Researchers will analyze these samples for tiny substances called metabolites to see if they ca…

This study is collecting information from up to 999 people with rectal cancer who are treated with a special device called the MAASTRO HDR applicator. The goal is to learn how well it works and what side effects it causes, so doctors can improve future treatments. Participants wi…

This study looks at how chronic perianal conditions like fistulas and abscesses impact a person's sexual health and body image—something often overlooked by doctors. Researchers will survey 60 adults using questionnaires to measure these effects and identify gaps in communication…

This study is creating and testing a mobile health app designed to help colorectal cancer survivors and their family caregivers follow healthy lifestyle recommendations. Researchers will work with 70 participants to see if the app is easy to use and acceptable. The goal is to imp…

This study looks at whether repeated sessions of hyperbaric oxygen therapy (HBOT) can damage DNA in people who have had radiation for cancer. HBOT is used to help heal tissues damaged by radiation, but it also creates reactive oxygen molecules that might harm DNA. Researchers wil…

This study follows 430 people with stage I-IV rectal cancer to measure their quality of life after surgery. Participants fill out questionnaires about their well-being and daily function. The goal is to learn how surgery impacts patients over time, not to test a new treatment.

This study follows 110 adults with head and neck, lung, or rectal cancer to see how their nutrition and body composition change during standard cancer treatments. Researchers will measure food intake, muscle mass, and strength over time. The goal is to gather data that could late…

This study looks at 500 children with a rare birth defect affecting the anus and rectum. Researchers will compare different surgical techniques to see which one leads to better bowel control and fewer complications. The children will be followed for up to 6 years after surgery. T…

This study is collecting stool and saliva samples from 2,500 people with colorectal cancer to look for patterns in bacteria and genetic material (microRNA). The goal is to improve how doctors diagnose and predict the course of the disease. Participants provide samples at key poin…

This study looks at whether adding a geriatrician (a doctor who specializes in care for older adults) to cancer treatment can improve outcomes for people aged 70 and older with gastrointestinal cancers like stomach, colon, or pancreatic cancer. Researchers will test if an online …

This study follows 100 adults who need surgery for an anal fistula. Researchers will track healing, recurrence, and quality of life for one year after the procedure. The goal is to see which surgical methods work best in real-world settings. No new treatments are being tested—onl…

This study looks at how Y90 radioembolization, a radiation treatment for liver tumors that have spread from colorectal cancer, actually works inside the body. Researchers will collect small tissue samples (biopsies) from the liver after treatment to see how much tumor damage occu…

This study is a large registry that will follow about 8,000 cancer patients who receive radiation therapy using a special machine called an MR-Linac, which combines an MRI scanner with a radiation beam. The goal is to learn how well this technology works for different cancers, in…

This study looks at whether a blood test can detect HPV DNA in people with HPV-related anal or cervical cancer who are receiving radiation therapy. Researchers will collect blood samples before, during, and after treatment to see if the virus's genetic material shows up and if it…

This study follows 368 colorectal cancer survivors aged 25 to 65 to see how their quality of life changes 6, 12, and 24 months after treatment. Researchers will use questionnaires to measure physical, mental, and social well-being and look for late side effects linked to specific…

This observational study follows 800 adults who receive Myriad™ during soft tissue reconstruction for wounds like abdominal dehiscence, pressure injuries, or anal fistulas. Researchers track healing time, complications, and side effects to understand how well the material works i…

This study checks if a bowel control questionnaire, the Baylor Continence Scale, works well for Turkish-speaking children aged 6 to 18 who had surgery for anorectal malformations. Researchers will translate the scale and test its accuracy and reliability. The goal is to give doct…

This study aims to understand which types of HPV are linked to anal cancer in China and how common the disease is. Researchers will collect samples and health data from 300 patients across multiple hospitals. The goal is to learn more about the virus and disease patterns, not to …

This first-in-human study tests a machine learning system that provides real-time guidance during robot-assisted rectal cancer surgery. The system aims to help surgeons by predicting the correct surgical plane. Twelve patients with rectal cancer will be enrolled to see if the tec…

This study looks at whether removing a urinary catheter one day after colorectal surgery is as safe as the standard three days. About 176 adults having certain pelvic surgeries will be randomly assigned to early or standard removal. The goal is to see if shorter use lowers infect…

This study will follow 150 people with radiation rectal injury to see if different subtypes of the condition lead to different outcomes. Researchers will collect medical records, endoscopy images, and test results but will not change any treatments. The goal is to fill gaps in kn…

This study looks at whether a special type of MRI, called amide proton transfer-weighted imaging, can accurately predict if rectal cancer has completely disappeared after chemotherapy and radiation. Researchers will compare the MRI results with the actual tissue removed during su…

This study is creating a registry of 100 women with extramammary Paget's disease (EMPD) of the vulva or perianal area. Researchers will collect health information, tissue samples, and skin swabs to learn more about the disease and the bacteria living on affected skin. The goal is…

This study follows 150 rectal cancer patients to understand why some have long-term bowel problems after treatment. Participants use a smartphone app to track symptoms and fill out quality-of-life questionnaires. The goal is to create personalized care plans that address each pat…

This study looks at 40 newborns with isolated rectal bleeding to see how many have a cow's milk protein allergy versus a temporary condition called transient neonatal colitis. By removing and then reintroducing cow's milk from the diet, doctors can confirm an allergy if bleeding …

This trial is testing whether taking daily fiber supplements can change the types and amounts of bacteria living in the colon. The study involves 120 adults with benign anal or colorectal conditions who are not currently on fiber supplements. Researchers will compare gut bacteria…

This study collects blood and leftover tissue samples from 9,600 people with various cancers, including breast, lung, and pancreatic cancer. Researchers will use these samples to improve tests that look for cancer DNA in the blood. The goal is to better detect if cancer returns o…

This study follows 100 adults with rectal cancer for 2 years after surgery to see how bowel function changes over time. Researchers will compare different treatment plans to find out which ones lead to better bowel control and quality of life. The goal is to help doctors and pati…

This study looks at gut bacteria in 300 people with colorectal cancer to see if certain bacteria are linked to cancer spread. Researchers will compare stool and tissue samples from patients whose cancer has spread versus those whose cancer has not. The goal is to find bacterial p…

This early-phase trial is testing two new antibody fragments that are designed to attach to a sugar molecule found on many solid tumors. The fragments are labeled with a radioactive tracer so they can be seen on PET/CT scans. The study aims to see where these fragments go in the …

This observational study follows 80 women treated with chemoradiotherapy for anal cancer to understand how radiation affects their vaginal and sexual health. Participants will have a gynecological exam, complete questionnaires about quality of life and sexual health, and allow re…

This observational study is developing a model that combines MRI scans, blood tests, and tissue samples to predict whether rectal cancer patients achieve a complete response after neoadjuvant therapy. Researchers will enroll 106 patients with locally advanced rectal cancer and co…

This study follows up with 100 men who took part in the ANRS IPERGAY HIV prevention trial to see how many have developed high-grade anal lesions or anal cancer a decade later. Researchers will use a special test to look for HPV mutations and viral DNA integration in the body. The…

This study looks at whether a pre-surgery program of exercise and nutrition advice is practical for people with stage II or III rectal cancer. About 40 participants will either join the program or receive usual care. The main goal is to see if enough people sign up and stick with…

This study is testing whether an artificial intelligence (AI) tool can help match cancer patients with the right clinical trials. Researchers will enroll up to 50,000 people with various cancers to see if the AI improves trial enrollment rates and patient outcomes. The goal is to…

This study collects and stores tissue and blood samples from people with stomach, esophageal, pancreatic, liver, and other gastrointestinal cancers. The goal is to build a large database of samples and medical information to help researchers understand these cancers better. Parti…

This study looks at whether a simple blood test can help doctors decide if rectal cancer patients can avoid surgery and keep their rectum. Researchers will measure tiny bits of tumor DNA in the blood (ctDNA) before, during, and after standard treatment. The goal is to see if chan…

This clinical trial is looking at how chemoradiation given before surgery affects circulating tumor cells (CTCs) in patients with stage II-III rectal cancer. CTCs are cancer cells that travel in the blood and may indicate how likely the cancer is to spread. The study will compare…

This study will collect blood and tumor samples from 1,100 people with various cancers, including head and neck, ovarian, cervical, lung, and brain cancers. Researchers want to learn how immune cells called T cells behave in these tumors. The goal is to better understand why some…