New hope for rare cancers: immunotherapy drug dostarlimab takes on chemo in phase 2 trial

NCT ID NCT06333314

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This phase 2 trial is testing whether the immunotherapy drug dostarlimab can work better than standard chemotherapy as a first treatment for people with rare, advanced cancers that have a specific genetic flaw called dMMR/MSI. The study includes 120 adults with cancers like pancreatic, stomach, or small bowel cancer that cannot be surgically removed. Patients are randomly assigned to receive either dostarlimab or chemotherapy, and those on chemotherapy may switch to dostarlimab if their disease gets worse.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance

Dostarlimab (an immunotherapy drug that helps the immune system attack cancer cells)

What this could lead to

If it works, this could provide a new first-line treatment option for people with rare cancers that have specific genetic features, potentially delaying disease progression.

What could go wrong

This is a phase 2 trial with only 120 participants, so results are preliminary. The drug may not work better than chemotherapy, and immunotherapy can cause immune-related side effects.

Disclaimer Read more

This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.

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Conditions

The condition(s) this trial relates to.

adrenal carcinoma adrenal cortex carcinoma ampulla of vater adenocarcinoma cancer of unknown primary site carcinoma of the ampulla of vater duodenal adenocarcinoma gastric adenocarcinoma gastroesophageal junction adenocarcinoma neoplasm Neoplasm Metastasis neuroendocrine carcinoma pancreatic adenocarcinoma sarcoma small intestine adenocarcinoma soft tissue sarcoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • CHU - Henri Mondor

    NOT_YET_RECRUITING

    Créteil, France

    Contact

  • CHU Jean Minjoz

    NOT_YET_RECRUITING

    Besançon, France

    Contact

  • CHU Morvan

    NOT_YET_RECRUITING

    Brest, France

    Contact

  • CHU de Bordeaux - Hôpital Haut -Lèvêque

    NOT_YET_RECRUITING

    Pessac, France

    Contact

  • CHU de Poitiers

    NOT_YET_RECRUITING

    Poitiers, France

    Contact

  • CHU de Rouen

    NOT_YET_RECRUITING

    Rouen, France

    Contact

  • CHU de Toulouse Hôpital Rangueil

    NOT_YET_RECRUITING

    Toulouse, France

    Contact

  • Centre Eugène Marquis

    NOT_YET_RECRUITING

    Rennes, France

    Contact

  • Centre François Baclesse

    NOT_YET_RECRUITING

    Caen, France

    Contact

  • Centre Georges François Leclerc

    NOT_YET_RECRUITING

    Dijon, France

    Contact

  • Centre Jean Perrin

    NOT_YET_RECRUITING

    Clermont-Ferrand, France

    Contact

  • Centre Léon Bérard

    RECRUITING

    Lyon, France

    Contact

  • Gustave Roussy Grand Paris

    NOT_YET_RECRUITING

    Villejuif, France

    Contact

  • Hôpital Saint-Antoine

    NOT_YET_RECRUITING

    Paris, Île-de-France Region, France

    Contact

  • Hôpital la Timone

    NOT_YET_RECRUITING

    Marseille, France

    Contact

  • Institut Jean Godinot

    NOT_YET_RECRUITING

    Reims, France

    Contact

  • Institut Mutualiste Montsouris

    NOT_YET_RECRUITING

    Paris, France

    Contact

  • Institut Paoli Calmettes

    NOT_YET_RECRUITING

    Marseille, France

    Contact

  • Institut de Cancérologie de Lorraine

    NOT_YET_RECRUITING

    Nancy, France

    Contact

  • Institut de Cancérologie de l'Ouest

    NOT_YET_RECRUITING

    Angers, France

    Contact

  • Institut de Cancérologie de l'Ouest

    NOT_YET_RECRUITING

    Saint-Herblain, France

    Contact

  • Institut du Cancer Avignon-Provence

    NOT_YET_RECRUITING

    Avignon, France

    Contact