Timing of Surgery After Chemoradiotherapy for Rectal Cancer

Timing to Minimally Invasive Surgery After Neoadjuvant Chemoradiotherapy for Rectal Cancer: a Multicenter Randomised Controlled Trial

Not applicable Interventional Azienda Ospedaliera SS. Antonio e Biagio e Cesare Arrigo di Alessandria · NCT03465982

This study is testing if having robotic or standard surgery for rectal cancer 8 weeks or 12 weeks after treatment helps patients do better in the long run.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment340 (estimated)
Ages18 Years and up
SexAll
SponsorAzienda Ospedaliera SS. Antonio e Biagio e Cesare Arrigo di Alessandria Academic / other
Drugs / interventionsradiation
Locations14 sites (Alessandria, AL and 13 other locations)
Trial IDNCT03465982 on ClinicalTrials.gov

What this trial studies

This trial compares the outcomes of robotic-assisted or standard laparoscopic rectal cancer surgery performed either 8 weeks or 12 weeks after neoadjuvant chemoradiotherapy. It aims to determine if delaying surgery affects the rate of pathological complete response (pCR) and improves disease-free survival (DFS) and overall survival (OS). The study will enroll 332 patients across multiple centers, with a follow-up period extending 5 years after the last patient is randomized. Participants will be randomized after providing consent and completing baseline questionnaires.

Who should consider this trial

Good fit: Ideal candidates are adults over 18 with locally advanced rectal cancer eligible for neoadjuvant chemoradiation and minimally invasive surgery.

Not a fit: Patients with metastatic disease or other types of rectal cancer, such as squamous carcinoma, may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved surgical outcomes and survival rates for patients with rectal cancer.

How similar studies have performed: Previous studies have explored timing in surgical interventions for rectal cancer, but this specific comparison of 8 vs. 12 weeks is novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age \>18 years
* cT3/4N0/+M0 confirmed on CT-scan, MRI (stratification for T3a-b-c-d) 3
* Tumor starting from the distal or medium rectum (even those crossing the peritoneal reflection at distal margin, within 15 cm from the anal margin)
* Histologically-proven adenocarcinoma of the rectum
* Eligible for a resective surgery with TME (low anterior resection, intersphincteric resection, abdominoperineal resection)
* Eligible for resection by minimally-invasive surgery (standard or robotic-assisted laparoscopic procedure, all robotic systems will be accepted)
* Eligible for chemoradiation treatment
* Able to give written informed consent
* Capable of completing required questionnaires at time of consent (provided questionnaires are available in a language spoke fluently by the participant)

Exclusion Criteria:

* Metastatic disease
* Squamous carcinoma of the anal canal
* Synchronous colorectal tumors requiring multi-segment surgical resection (n.b. a benign lesion within the resection field in addition to the main cancer would not exclude a patient)
* History of psychiatric or addictive disorder or other medical condition that, in the opinion of the investigator, would preclude the patient from meeting the trial requirements
* Pregnancy
* Unable to complete neoadjuvant treatment
* Unable to give free informed consent
* Previous radiation treatment on the pelvis
* Inflammatory bowel disease
* Hereditary colorectal disease
* Previous tumors other than non-melanoma skin cancer, papillary or follicular thyroid cancer
* Participation in another rectal cancer clinical trial relating to the topic of this trial

Where this trial is running

Alessandria, AL and 13 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Rectal Cancerrectal cancerrobotic rectal cancer resectionminimally invasive surgeryColorectal Cancerchemoradiation treatment rectal cancer
Last reviewed 2026-06-13 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.