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Can more radiation save rectums? new trial aims to find out

NCT ID NCT04095299

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

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. Participants will be monitored closely for two years to check if the cancer stays away.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Radiotherapy (standard or high dose) plus chemotherapy (capecitabine)
What this could lead to
If successful, this could offer a way for some early rectal cancer patients to avoid surgery and keep their rectum, improving quality of life.
What could go wrong
This is a phase 3 trial, but it's still uncertain if the higher dose will work better. Risks include side effects from radiation and chemotherapy, and the cancer may still come back.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

About 162 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2020

Expected to finish

Dec 2033

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Histopathologically verified adenocarcinoma of the rectum * MDT conference finds patient a candidate for rectal resection * Clinical tumor category cT1-3 * MRI findings * Maximal cross-sectional size of 4.5 cm (axial plane relative to the rectum) * Lowest edge of tumor located at or below the peritoneal reflection on MRI * Performance status 0-2 * Age ≥ 18 years * Eligible for radiotherapy and capecitabine according to investigator, including * Adequate function of bone marrow (neutrophils ≥ 1.5 x 10\^9/l and thrombocytes ≥ 100 x 10\^9/l) * Adequate function of liver (ALAT \< 2.5 x upper limit of normal, bilirubin \< 2.5 x upper limit of normal) * Adequate kidney function (Serum creatinine \< 1.5 x upper limit of normal or measured GFR \> 30 ml/min) * Fertile women must present a negative pregnancy test and use secure contraceptives during and three months after treatment * Written and orally informed consent Exclusion Criteria: * Previous surgical treatment of the present cancer, including transanal excision of tumor * Other malignant disease within the past five years except non-melanoma skin cancer and premalignant lesions such as carcinoma in situ * Distant metastases verified by imaging or biopsy, i.e. cM1 * Previous radiation treatment of the pelvis * Pregnant or breastfeeding women. * Existing colostomy or ileostomy

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    5 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Aalborg University Hospital

    RECRUITING

    Aalborg, Denmark

  • Copenhagen University Hospital, Righshospitalet and Bispebjerg Hospital

    RECRUITING

    Copenhagen, Denmark

  • Department of Oncology, Vejle Hospital

    RECRUITING

    Vejle, Denmark

  • Zealand University Hospital, Næstved

    RECRUITING

    Næstved, Denmark

  • Zealand University Hospital, Roskilde

    RECRUITING

    Roskilde, Denmark

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