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A Phase 3, Open-Label, Randomized Study of Perioperative Dostarlimab Monotherapy versus Standard of Care in Participants with Untreated T4N0 or Stage III dMMR/MSI-H Resectable Colon Cancer

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2023-503265-27-00
Acronym
219606
Enrollment
477
Registered
2023-09-18
Start date
2023-11-23
Completion date
Unknown
Last updated
2025-10-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Participants with Untreated T4N0 or Stage III dMMR/MSI-H Resectable Colon Cancer

Brief summary

Event Free Survival (EFS) with recurrence assessed by Blinded Independent Central Review (BICR). Where an event is defined as: Disease recurrence based on radiological assessment by BICR; Disease progression precluding surgery (local assessment); Disease recurrence based on a pathological assessment of new lesions identified after surgery (local assessment); Death due to any cause; Treatment related toxicity that results in the participant not being suitable for surgery.

Detailed description

Pathological response determined by local assessment., OS, defined as time from randomization to death from any cause., EFS with recurrence assessed by local assesment (component events are the same as primary endpoint)., Frequency and severity of treatment emergent AEs, SAEs, irAEs, and AEs leading to death or discontinuation of study intervention., Serum concentrations and relevant PK parameters (C-EoI and Ctrough) for dostarlimab., Incidence of ADA against dostarlimab.

Interventions

Sponsors

Glaxosmithkline Research & Development Limited
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Event Free Survival (EFS) with recurrence assessed by Blinded Independent Central Review (BICR). Where an event is defined as: Disease recurrence based on radiological assessment by BICR; Disease progression precluding surgery (local assessment); Disease recurrence based on a pathological assessment of new lesions identified after surgery (local assessment); Death due to any cause; Treatment related toxicity that results in the participant not being suitable for surgery.

Secondary

MeasureTime frame
Pathological response determined by local assessment., OS, defined as time from randomization to death from any cause., EFS with recurrence assessed by local assesment (component events are the same as primary endpoint)., Frequency and severity of treatment emergent AEs, SAEs, irAEs, and AEs leading to death or discontinuation of study intervention., Serum concentrations and relevant PK parameters (C-EoI and Ctrough) for dostarlimab., Incidence of ADA against dostarlimab.

Countries

Belgium, Czechia, Estonia, Finland, France, Germany, Greece, Italy, Netherlands, Norway, Poland, Portugal, Spain, Sweden

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026