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Longterm Functional Outcomes in Patients Undergoing Organ Preserving Treatment for Rectal Cancer With or Without Local Excision After Chemoradiotherapy

NCT06249672 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 200

Last updated 2026-05-05

No results posted yet for this study

Summary

Treatment of rectal cancer by standard neoadjuvant chemoradiotherapy protocols leads to a complete response in about 15% of patients, or even a higher fraction if radiotherapy is followed by an Oxaliplatin based chemotherapy as published recently.

If patient presents with a (near) complete response at the time of restaging after neoadjuvant treatment, an organ preservation strategy can be an alternative treatment to low anterior resection or abdominoperineal excision of the rectum. An organ preserving strategy is an ideal option for patients that are too frail for a major oncological resection. Furthermore, organ preservation is increasingly an option for a broader spectrum of patients as there is growing evidence that it allows to avoid surgical risks, including major dysfunction of the urinary, sexual and anorectal function at equivalent oncological outcomes.

Studies investigating organ preserving rectal cancer treatment can broadly be divided into two categories. The first option is a planned local resection of the remaining scar at the site of the tumor after chemoradiotherapy. This can be achieved by direct transanal resection in very low tumors or by an endoscopic procedure as TEM (transanal endoscopic microsurgery) or TAMIS (trans-anal minimally invasive surgery). The advantage of this approach is the resulting pathological diagnosis which can confirm the complete response microscopically or indicate if there is remnant tumor tissue left and whether this is completely removed. However, local resection might have an additional negative functional impact and cumulate with function impairment from chemoradiotherapy.

Alternatively, patients after complete clinical response can directly enter a surveillance programme without excision of the remaining scar after neoadjuvant treatment. This strategy provides less certainty about the complete regression of the primary tumor, but allows a treatment completely without surgical interventions and might lead to an even better functional outcome compared to patients undergoing local excision.

There is good evidence that the influence of chemoradiotherapy on anorectal and genitourinary function is relevant. However there is lack of good quality data how much local excision adds to this impairment on the long run. In this study the investigator aims to compare functional outcomes and subjective treatment satisfaction in patients undergoing organ preserving treatment for rectal cancer with and without local resection after chemoradiotherapy. This data will help patients and healthcare personal to choose between these treatment options in the future, knowing the difference in functional outcome between the groups.

As this is an observational study, there will not be any influence on treatment decisions for the included subjects. Clinical data will be collected by questionnaires and compared between the two cohorts, which is in line with a risk category A according to HRO (Human Research Ordinance).

Conditions

Interventions

OTHER

Local excision

Organ preservation after RCT (radiochemotherapy) of rectal cancer

Sponsors & Collaborators

  • Insel Gruppe AG, University Hospital Bern

    lead OTHER

Principal Investigators

  • Andreas Kohler, MD · Insel Gruppe AG, University Hospital Bern

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-01-17
Primary Completion
2028-01-16
Completion
2028-01-16

Countries

  • Switzerland

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06249672 on ClinicalTrials.gov