Precancerous condition
MONDO:0021074A pathological process with signs indicating it may become cancerous. Representative examples include leukoplakia, dysplastic nevus, actinic keratosis, xeroderma pigmentosum, and intraepithelial neoplasia.
Also known as: precancerous condition, precancerous state, premalignant condition, premalignant state
518 clinical trials for this condition and its sub-types, 51 tagged with Precancerous condition itself.
Follow this condition to get notified about new trialsWhere it sits in the disease tree
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Sub-types of Precancerous condition
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In situ carcinoma 25 trials · 318 incl. sub-types
21 sub-types
- Breast carcinoma in situ 76 trials · 204 incl. sub-types Sub-types →
- Adenocarcinoma in situ 10 trials · 170 incl. sub-types Sub-types →
- Bladder carcinoma in situ 30 trials
- Intestine carcinoma in situ 0 trials · 16 incl. sub-types Sub-types →
- Uterus carcinoma in situ 0 trials · 16 incl. sub-types Sub-types →
- Esophagus carcinoma in situ 13 trials
- Squamous carcinoma in situ 5 trials · 10 incl. sub-types Sub-types →
- Skin carcinoma in situ 3 trials · 9 incl. sub-types Sub-types →
- Oral cavity carcinoma in situ 5 trials Sub-types →
- Stomach carcinoma in situ 4 trials Sub-types →
- Lung carcinoma in situ 2 trials · 3 incl. sub-types Sub-types →
- Pharynx carcinoma in situ 0 trials · 2 incl. sub-types Sub-types →
- Larynx carcinoma in situ 1 trial Sub-types →
- Carcinoma in situ of ureter 0 trials
- Carcinoma in situ of urethra 0 trials
- Eye carcinoma in situ 0 trials
- Gall bladder carcinoma in situ 0 trials
- Grade III prostatic intraepithelial neoplasia 0 trials
- Kidney carcinoma in situ 0 trials Sub-types →
- Liver carcinoma in situ 0 trials Sub-types →
- Nasal cavity carcinoma in situ 0 trials
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Intraepithelial neoplasia 25 trials · 71 incl. sub-types
3 sub-types
- Squamous cell intraepithelial neoplasia 26 trials · 43 incl. sub-types Sub-types →
- Prostate intraepithelial neoplasia 2 trials Sub-types →
- Small intestinal intraepithelial neoplasia 1 trial
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Pre-malignant neoplasm 2 trials · 43 incl. sub-types
1 sub-type
- Actinic keratosis 41 trials
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Leukoplakia 7 trials · 28 incl. sub-types
5 sub-types
- Oral mucosa leukoplakia 23 trials Sub-types →
- Esophageal leukoplakia 1 trial
- Leukoplakia of penis 0 trials
- Leukoplakia of vagina 0 trials
- Uterine cervix leukoplakia 0 trials
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Premalignant hematological system disease 3 trials · 25 incl. sub-types
2 sub-types
- Clonal hematopoiesis 10 trials · 22 incl. sub-types Sub-types →
- Atypical lymphoproliferative disorder 0 trials
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Gastric intestinal metaplasia 18 trials
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Preneoplastic lesion 8 trials
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Neoplastic polyp 1 trial · 5 incl. sub-types
1 sub-type
- Polyposis 3 trials · 4 incl. sub-types Sub-types →
Most studied deeper sub-types
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New bladder cancer drug delivered directly into bladder shows early promise
Disease control Stopped earlyThis early-phase trial tested enfortumab vedotin, a drug placed directly into the bladder via a catheter, in 37 people with a type of bladder cancer that did not respond to standard BCG therapy. The main goals were to check safety and side effects, and to see if the drug could he…
Phase 1 • Sponsor: Astellas Pharma Global Development, Inc. • Aim: Disease control
Last updated Sep 16, 2026 00:00 UTC
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CRISPR zaps HPV in cervical lesions: first human test begins
Disease control Stopped earlyThis early study tests a new CRISPR gene therapy (BD114) in 12 women with high-grade cervical lesions caused by HPV-16. The therapy is injected directly into the lesion to disable the virus's cancer-causing genes. The main goals are to check safety and see if the lesions clear up…
Early phase 1 • Sponsor: Shanghai BDgene Co., Ltd. • Aim: Disease control
Last updated Sep 06, 2026 00:00 UTC
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New drug OMS721 tested for rare kidney conditions
Disease control Stopped earlyThis study tested a drug called OMS721 in 31 people with certain kidney diseases, including IgA nephropathy and lupus nephritis. The main goal was to check if the drug is safe and if it reduces protein in the urine, a sign of kidney damage. The study was stopped early, so results…
Phase 2 • Sponsor: Omeros Corporation • Aim: Disease control
Last updated Jun 27, 2026 12:02 UTC
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Cell sheet trial for esophageal cancer patients ends early with just one volunteer
Disease control Stopped earlyThis study tested a treatment using a sheet of the patient's own mouth cells to prevent the esophagus from narrowing after cancer removal surgery. Only one person took part before the study was stopped early. The goal was to see if the cell sheet could safely reduce scarring and …
Phase 3 • Sponsor: CellSeed Inc. • Aim: Disease control
Last updated Jun 27, 2026 12:01 UTC
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Cervical lesion drug trial halted early
Disease control Stopped earlyThis study tested a vaginal insert called ABI-2280 in women with cervical precancerous lesions (CIN). The goal was to see if it was safe and could help clear the abnormal cells. The trial was stopped early, so we don't have full results. It involved 44 women aged 25-55 who used t…
Phase 1/2 • Sponsor: Antiva Biosciences • Aim: Disease control
Last updated Jun 27, 2026 09:06 UTC
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Battle of the scalpels: which surgery is best for early rectal cancer?
Disease control Stopped earlyThis study compared two procedures for removing early-stage rectal cancer or precancerous growths: endoscopic submucosal dissection (ESD) and transanal endoscopic microsurgery (TEM). Both are less invasive than traditional surgery. The goal was to see which one removes the tumor …
Sponsor: Assistance Publique Hopitaux De Marseille • Aim: Disease control
Last updated Jun 27, 2026 07:57 UTC
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New hope for chemo-resistant breast cancer? trial tests immune-boosting drug
Disease control Stopped earlyThis study looked at whether the drug abemaciclib could help people with triple negative breast cancer that didn't respond to standard chemotherapy. The goal was to see if the drug could change the tumor's immune environment to make it more attackable by the body's defenses. The …
Phase 2 • Sponsor: Mayo Clinic • Aim: Disease control
Last updated Jun 27, 2026 07:57 UTC
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One-Time radiation during breast surgery: can imaging pick the right patients?
Disease control Stopped earlyThis study looked at whether mammography and breast MRI could help identify patients with early-stage breast cancer (DCIS) who could safely receive a single dose of radiation during surgery, instead of weeks of daily radiation afterward. The goal was to avoid repeat surgeries and…
Sponsor: University of Southern California • Aim: Disease control
Last updated Jun 27, 2026 07:56 UTC
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Kidney disease drug trial halted midway: what happened?
Disease control Stopped earlyThis study tested a drug called ALXN2050 in people with kidney inflammation caused by lupus (lupus nephritis) or IgA nephropathy. The goal was to see if it could reduce protein in the urine, a sign of kidney damage. About 100 adults were planned to take the drug or a placebo alon…
Phase 2 • Sponsor: Alexion Pharmaceuticals, Inc. • Aim: Disease control
Last updated Jun 27, 2026 07:54 UTC
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Microscope aims to spare breast cancer patients a second surgery
Diagnosis Stopped earlyResearchers are testing a nonlinear microscope (NLM) that images breast tissue during lumpectomy without the usual slide preparation. The goal is to see if the NLM can help surgeons find close or positive margins right away, so fewer patients need a second operation. The trial en…
Sponsor: Beth Israel Deaconess Medical Center • Aim: Diagnosis
Last updated Sep 18, 2026 00:00 UTC
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Glow-in-the-Dark dye could help surgeons spot hidden oral cancer cells
Diagnosis Stopped earlyThis study tested a dye called tozuleristide that makes oral cancer cells glow under special light during surgery. The goal was to help surgeons see and remove all cancer while sparing healthy tissue. The trial included 8 adults with oral cavity cancer or high-grade dysplasia. Th…
Phase 1/2 • Sponsor: University of Washington • Aim: Diagnosis
Last updated Sep 18, 2026 00:00 UTC
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Breast cancer prevention study halted: tamoxifen pill vs. gel tested
Prevention Stopped earlyThis study aimed to see if a tamoxifen skin gel could work as well as the pill to lower breast cancer risk in women with certain high-risk breast conditions. The trial enrolled 65 women and compared short-term changes in breast tissue. However, the study was terminated early, so …
Phase 2 • Sponsor: Mayo Clinic • Aim: Prevention
Last updated Sep 03, 2026 00:00 UTC
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Hot flash relief drug studied in breast cancer patients
Symptom relief Stopped earlyThis study tested fezolinetant, a drug that blocks a brain receptor involved in temperature control, to see if it reduces hot flashes and night sweats in women with breast cancer taking hormone therapy. Nine participants were enrolled before the trial was stopped early. The goal …
Phase 2 • Sponsor: University of Michigan Rogel Cancer Center • Aim: Symptom relief
Last updated Jun 27, 2026 12:29 UTC
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Genetic test aims to improve breast cancer decisions for black and hispanic women
Knowledge-focused Stopped earlyThis study looked at whether adding a polygenic risk score (a genetic test) to standard breast cancer risk tools helps African American and Hispanic women make better decisions about screening and prevention. Researchers enrolled 19 women at higher risk for breast cancer. The stu…
Sponsor: Mayo Clinic • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:28 UTC
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Lung cancer gene study halted early
Knowledge-focused Stopped earlyThis study looked at the genetics of people with multiple lung tumors (multifocal lung adenocarcinoma). Researchers collected tissue and blood samples from 100 participants during surgery to analyze their DNA. The goal was to see if genetic information could help guide treatment …
Sponsor: Mayo Clinic • Aim: Knowledge-focused
Last updated Jun 27, 2026 07:59 UTC
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Cancer drug tested before surgery for non-invasive breast condition
Knowledge-focused Stopped earlyThis study looked at whether giving the drug palbociclib before surgery could cause changes in breast tissue in people with ductal carcinoma in situ (DCIS), a very early form of breast cancer. It planned to enroll 24 participants, but was stopped early after only 17 joined. The m…
Phase 2 • Sponsor: Georgetown University • Aim: Knowledge-focused
Last updated Jun 27, 2026 07:51 UTC