Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Non-surgical treatment for low rectal cancer after chemotherapy and radiation

Official title: Phase II Study to Assess the Safety of Non-operative Management for Low Rectal Cancer

Run by Mount Sinai Hospital, Canada · NCT03179540 · Data updated 2026-11-12

This study is testing if patients with low rectal cancer who respond well to chemotherapy and radiation can safely avoid surgery by being closely monitored instead.

More Rectal Neoplasms trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment90 (estimated)
SponsorMount Sinai Hospital, Canada
Academic / other
Drugs / interventionschemotherapy
Locations1 site (Toronto, Ontario)
StatusRecruiting
StartedMarch 16, 2018
Main results expectedDecember 2026
Study endsDecember 2028
Registry record updatedJune 23, 2026
Trial IDNCT03179540 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older with low rectal cancer who have completed chemoradiotherapy and achieved a complete clinical response.

Probably not a fit

Patients with metastatic disease, inflammatory bowel disease, or those unfit for surgery may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the safety of non-operative management (NOM) for patients with low rectal cancer who achieve a complete clinical response after chemoradiotherapy. It aims to determine if NOM can effectively replace surgery by monitoring local re-growth rates and the presence of positive resection margins when surgery is necessary. The study will involve active surveillance of patients instead of immediate surgical intervention, potentially reducing the long-term complications associated with surgery. Conducted across multiple centers in Canada, this Phase II trial seeks to provide more robust evidence for the NOM approach.

Why it matters

Potential benefit: If successful, this approach could significantly reduce the need for surgery and its associated complications for patients with low rectal cancer.

How similar studies have gone: While there have been a few single institution studies showing favorable results with non-operative management, this approach has not yet been widely adopted, making this study a significant step in evaluating its safety.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Completed chemoradiotherapy (CRT) as standard of care \[Stage II and Stage III (T3-T4N0, AnyTN1-2)\]; \[50 Gy (2 Gy x 25 fractions) with 5-FU or capecitabine\]
* Planned or probable APR
* ALL criteria for complete clinical response are met between 8 and 10 weeks following completion of CRT
* 18 years or older
* Provides written consent

Exclusion Criteria:

* Unable to undergo MRI
* Metastatic disease (including extramesorectal and retroperitoneal lymph nodes)
* Pregnancy
* Inflammatory bowel disease
* More than one primary colorectal cancer
* Other malignancy within 5 years of treatment for current rectal cancer
* Unfit for surgery

Where it's running

  • Sinai Health System
    Toronto, Ontario, Canada
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.