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Safety and Efficacy of NOM and OPFS Versus RO for dMMR/MSI-H or POLE-Mutated Gastrointestinal Cancers (NOR-MP)

6. Juni 2026 aktualisiert von: Xiaokang Lei, Peking University Cancer Hospital & Institute

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

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.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

The NOR-MP trial is a single-center, bidirectional registry study designed to compare the clinical outcomes of Organ Preservation First Strategy (OPFS) / Non-Operative Management (NOM) against standard Radical Operation (RO) for patients diagnosed with dMMR/MSI-H or POLE-mutated gastrointestinal cancers. The study is divided into two sequential parts based on the nature of data collection:

Part 1: Retrospective Cohort Study

This part retrospectively reviews the medical records of eligible patients with dMMR/MSI-H or POLE-mutated gastrointestinal cancers who previously completed neoadjuvant immunotherapy. Patients are allocated into two historical cohorts:

Experimental Cohort (NOM/OPFS): Patients who achieved cCR/near-cCR after neoadjuvant immunotherapy and entered the "Watch & Wait" (W&W) program, as well as those with near-cCR or non-cCR who underwent local excision (LE) or endoscopic resection (including Endoscopic Submucosal Dissection [ESD] or Endoscopic Mucosal Resection [EMR]).

Control Cohort (RO): Patients who underwent radical surgical operation after neoadjuvant immunotherapy. Pathological outcomes (including the proportions of ypCR, ypTisN0, and ypT1-2N0) and surgical safety data will be collected and analyzed.

Part 2: Prospective Registry Study

This part prospectively enrolls newly diagnosed patients with dMMR/MSI-H or POLE-mutated gastrointestinal cancers receiving neoadjuvant immunotherapy. Following treatment evaluation by the multi-disciplinary NOR-MP research team, patients are enrolled into two parallel observational tracks:

Experimental Cohort (NOM/OPFS): Patients eligible for and consenting to NOM or OPFS. This includes the W&W strategy for those achieving cCR/near-cCR, and LE or endoscopic resection (ESD/EMR) for those with near-cCR or non-cCR.

Control Cohort (RO): Patients who proceed to standard radical operation. Pathological response distribution (proportions of ypCR, ypTisN0, ypT1-2N0, and ypT3+ diseases) and short-to-long-term surgical safety endpoints will be prospectively documented.

By comparing the retrospective and prospective cohorts, this study evaluates whether the omission of radical surgery is oncologically safe and preserves organ function without compromising long-term survival.

Studientyp

Beobachtungs

Einschreibung (Geschätzt)

22

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

  • Name: Xiaokang Lei, M.D.
  • Telefonnummer: +8618811181993
  • E-Mail: lxkpku@163.com

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Nein

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

The target population consists of adult patients diagnosed with primary gastrointestinal cancers (including but not limited to colorectal cancer, gastric cancer, and gastroesophageal junction cancer) that are histologically confirmed as deficient mismatch repair/microsatellite instability-high (dMMR/MSI-H) or harboring polymerase epsilon (POLE) exonuclease domain mutations. All enrolled patients must have received or are scheduled to receive neoadjuvant or conversion immunotherapy prior to definitive local tumor management strategy determination.

Beschreibung

Inclusion Criteria:

  • 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.

Exclusion Criteria:

  • Concurrently diagnosed with other active malignant tumors within the past 5 years.
  • Patients with proficient mismatch repair (pMMR) / microsatellite stable (MSS) tumors, or wild-type POLE status.
  • Evidence of untreatable distant metastasis or systemic disease that precludes local tumor management (NOM/OPFS or radical operation).
  • 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).

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

Kohorten und Interventionen

Gruppe / Kohorte
Intervention / Behandlung
Experimental Cohort (NOM/OPFS)

Retrospective Cohort Study: Patients who achieved cCR/near-cCR after neoadjuvant immunotherapy and entered the "Watch & Wait" (W&W) program, as well as those with near-cCR or non-cCR who underwent local excision (LE) or endoscopic resection (including Endoscopic Submucosal Dissection [ESD] or Endoscopic Mucosal Resection [EMR]).

Prospective Registry Study: Patients eligible for and consenting to NOM or OPFS. This includes the W&W strategy for those achieving cCR/near-cCR, and LE or endoscopic resection (ESD/EMR) for those with near-cCR or non-cCR.
Sonstiges: NOM/OPFS
Patients eligible for and consenting to NOM or OPFS. This includes the W&W strategy for those achieving cCR/near-cCR, and LE or endoscopic resection (ESD/EMR) for those with near-cCR or non-cCR.
Control Cohort (RO)

Retrospective Cohort Study: Patients who underwent radical surgical operation after neoadjuvant immunotherapy. Pathological outcomes (including the proportions of ypCR, ypTisN0, and ypT1-2N0) and surgical safety data will be collected and analyzed.

Prospective Registry Study: Patients who proceed to standard radical operation. Pathological response distribution (proportions of ypCR, ypTisN0, ypT1-2N0, and ypT3+ diseases) and short-to-long-term surgical safety endpoints will be prospectively documented.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Organ Preservation Rate (for OPFS/NOM group)
Zeitfenster: Up to 3 years after the completion of neoadjuvant immunotherapy.
The percentage of patients in the NOM/OPFS group who successfully maintain their native organ without requiring radical surgical resection or permanent stoma.
Up to 3 years after the completion of neoadjuvant immunotherapy.

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Surgical Safety and Postoperative Complications
Zeitfenster: Within 30 days and 90 days post-surgery.
Incidence and severity of perioperative complications classified by the Clavien-Dindo classification. This compares the safety data among patients undergoing Radical Operation (RO), Local Excision (LE), or endoscopic resection (ESD/EMR).
Within 30 days and 90 days post-surgery.
Pathological Response Distribution (for RO group)
Zeitfenster: At the time of radical surgery (typically within 4-12 weeks post-immunotherapy).
Proportions of patients in the radical operation cohort achieving pathological complete response (ypCR), ypTisN0, ypT1-2N0, and ypT3+ diseases to characterize the pathological efficacy of neoadjuvant immunotherapy.
At the time of radical surgery (typically within 4-12 weeks post-immunotherapy).
Local Regrowth / Recurrence Rate
Zeitfenster: Followed up at regular intervals (every 3-6 months) up to 3 years.
Rate of tumor regrowth in patients undergoing the "Watch & Wait" strategy, or local recurrence in patients undergoing local/endoscopic excision.
Followed up at regular intervals (every 3-6 months) up to 3 years.
Overall Survival (OS)
Zeitfenster: Up to 5 years.
Defined as the time from treatment initiation to death from any cause.
Up to 5 years.
Disease-Free Survival (DFS) / Disease-Specific Survival (DSS)
Zeitfenster: From enrollment/treatment initiation up to 5 years.
To compare the long-term oncological efficacy between the NOM/OPFS group and the RO group. DFS is defined as the time from the start of neoadjuvant immunotherapy to the date of first documentation of disease recurrence (local, regional, or distant), progression, or death from any cause.
From enrollment/treatment initiation up to 5 years.

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Peking University Cancer Hospital & Institute

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

15. Juli 2026

Primärer Abschluss (Geschätzt)

15. Januar 2027

Studienabschluss (Geschätzt)

15. Januar 2030

Studienanmeldedaten

Zuerst eingereicht

6. Juni 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

6. Juni 2026

Zuerst gepostet (Tatsächlich)

11. Juni 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

11. Juni 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

6. Juni 2026

Zuletzt verifiziert

1. Juni 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Schlüsselwörter

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • PKUCH-NORMP trial

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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