NCT07642323Not yet recruiting
Safety and Efficacy of NOM and OPFS Versus RO for dMMR/MSI-H or POLE-Mutated Gastrointestinal Cancers
Safety and Efficacy of Nonoperative Management (NOM) and Organ Preservation First Strategy (OPFS) Versus Radical Operation (RO) for dMMR/MSI-H or POLE-Mutated Gastrointestinal Cancers: A Single-Center, Bidirectional Registry Study
Source: ClinicalTrials.gov · Last updated 11 Jun 2026
Brief summary (registry, in English)
Purpose: The purpose of this study is to evaluate the safety and efficacy of Non-Operative Management (NOM) and Organ Preservation First Strategy (OPFS) compared with Radical Operation (RO) in patients with deficient mismatch repair/microsatellite instability-high (dMMR/MSI-H) or POLE-mutated gastrointestinal cancers. Background \& Design: With the remarkable efficacy of neoadjuvant immunotherapy in dMMR/MSI-H or POLE-mutated gastrointestinal tumors, organ preservation has become a promising alternative to highly invasive surgeries. The NOR-MP trial is a single-center, bidirectional registry study consisting of two parts: a retrospective cohort study and a prospective observational registry. Intervention Group (NOM/OPFS): Patients who achieve a clinical complete response (cCR) or near-cCR after neoadjuvant immunotherapy will undergo a "Watch \& Wait" (W\&W) strategy. Patients with near-cCR or non-cCR who are eligible for organ preservation will undergo local excision (LE) or endoscopic resection (including ESD or EMR). Comparison Group (Radical Operation): Patients who undergo standard radical surgical resection after neoadjuvant immunotherapy. The study aims to determine whether an organ-preserving approach can achieve comparable oncological outcomes and safety profiles while significantly improving patients' quality of life compared to radical surgery.
- Status (registry)
- Not yet recruiting
- Study type
- Observational
- Enrollment
- 22 (estimated)
- First submitted
- 6 Jun 2026
- Start date
- 15 Jul 2026
- Primary completion date
- 15 Jan 2027
- Lead sponsor
- Peking University Cancer Hospital & Institute
- NCT number
- NCT07642323
What you commit to
- Study type: Observational
- Planned participants: 22
- From 15 Jul 2026 to the primary completion date, 15 Jan 2027
- No sites listed in no country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Concurrently diagnosed with other active malignant tumors within the past 5 years.
- Evidence of untreatable distant metastasis or systemic disease that precludes local tumor management (NOM/OPFS or radical operation).
Other
- Patients with proficient mismatch repair (pMMR) / microsatellite stable (MSS) tumors, or wild-type POLE status.
- Inability to undergo regular endoscopic, radiological (MRI/CT), or clinical follow-up due to compliance or geographic reasons.
- Refusal to sign the informed consent form (applicable to the prospective cohort).
Who the study is looking for
- Histologically confirmed primary gastrointestinal adenocarcinoma or squamous cell carcinoma (e.g., colorectal cancer, gastric cancer, gastroesophageal junction cancer).
- Confirmed as deficient mismatch repair (dMMR) by immunohistochemistry (IHC), high microsatellite instability (MSI-H) by polymerase chain reaction (PCR) or next-generation sequencing (NGS), or harboring POLE exonuclease domain mutations.
- Received neoadjuvant/conversion immunotherapy (immune checkpoint inhibitors, either monotherapy or combination therapy) prior to treatment response evaluation.
- For the Retrospective Cohort (Part 1): Patients treated between \[Start Month/Year\] and \[End Month/Year\] who completed evaluation and subsequent strategy (NOM/OPFS or RO).
- For the Prospective Cohort (Part 2): Newly diagnosed patients who consent to long-term follow-up and multi-disciplinary team (MDT) assessment for organ preservation or radical surgery.
- Age ≥ 18 years at the time of diagnosis.
- Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers
This page is information, not medical advice. Discuss any trial with your doctor.