New drug shows promise for rare HER2-Mutated cancers

NCT ID NCT04639219

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This phase II trial tests a drug called trastuzumab deruxtecan (T-DXd) in 102 adults with advanced solid tumors that have specific HER2 mutations. The cancers include types like colorectal, gastric, and ovarian, among others. The goal is to see if the drug can shrink tumors or slow their growth. Participants must have already tried other treatments or have no good options left.

What this could mean

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

Active substance

trastuzumab deruxtecan (T-DXd)

What this could lead to

If successful, this could provide a new treatment option for people with hard-to-treat cancers that have specific HER2 mutations, regardless of where the cancer started.

What could go wrong

This is a mid-stage trial with only 102 participants and no comparison group. The drug may not work for all mutation types, and side effects like lung inflammation or heart problems are possible.

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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Sign up to get updates when this study changes or when new studies for ADVANCED SOLID TUMORS WITH HER2 MUTATION,EG:COLORECTAL,UROTHELIAL,GASTRIC, HEPATOBILIARY,ENDOMETRIAL,MELANOMA,OVARIAN,CERVICAL,SALIVARY GLAND,PANCREATIC,BREAST are added.

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Conditions

The condition(s) this trial relates to.

Neoplasm Metastasis

As listed by the trial registrant

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

Contacts and locations

Locations

  • Research Site

    Santa Rosa, California, 95403, United States

  • Research Site

    Muncie, Indiana, 47303, United States

  • Research Site

    Boston, Massachusetts, 02115, United States

  • Research Site

    Boston, Massachusetts, 02215, United States

  • Research Site

    Middletown, New Jersey, 07748, United States

  • Research Site

    Commack, New York, 11725, United States

  • Research Site

    Harrison, New York, 10604, United States

  • Research Site

    New York, New York, 10021, United States

  • Research Site

    Houston, Texas, 77030, United States

  • Research Site

    Fairfax, Virginia, 22031, United States

  • Research Site

    Anderlecht, 1070, Belgium

  • Research Site

    Toronto, CA, M5G 2M9, Canada

  • Research Site

    Copenhagen, 2100, Denmark

  • Research Site

    Bordeaux, 33076, France

  • Research Site

    Lyon, 69008, France

  • Research Site

    Villejuif, 94805, France

  • Research Site

    Milan, 20141, Italy

  • Research Site

    Milan, 20162, Italy

  • Research Site

    Naples, 80131, Italy

  • Research Site

    Chūōku, 104-0045, Japan

  • Research Site

    Kashiwa, 277-8577, Japan

  • Research Site

    Suita-shi, 565-0871, Japan

  • Research Site

    Seoul, 03080, South Korea

  • Research Site

    Seoul, 03722, South Korea

  • Research Site

    Seoul, 06351, South Korea

  • Research Site

    Barcelona, 08035, Spain

  • Research Site

    Madrid, 28041, Spain

  • Research Site

    Madrid, 28050, Spain

  • Research Site

    Pamplona, 31008, Spain

  • Research Site

    Seville, 41013, Spain