New combo therapy aims to shrink Hard-to-Treat neuroendocrine liver tumors

NCT ID NCT03457948

First seen Jun 24, 2026 · Last updated Jun 26, 2026 · Updated 1 time

Summary

This phase 2 pilot study tests whether combining the immunotherapy drug pembrolizumab (Keytruda) with liver-directed treatments (like embolization or radiation) or peptide receptor radionuclide therapy (PRRT) can shrink tumors in people with well-differentiated neuroendocrine tumors that have spread to the liver. About 32 adults with symptomatic or growing liver metastases will receive one of three treatment combinations. The goal is to see if these combos work better than pembrolizumab alone, while monitoring side effects.

What this could mean

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

Active substance
Pembrolizumab (Keytruda) combined with liver-directed therapies (TAE, radioembolization) or peptide receptor radionuclide therapy (Lutathera)
What this could lead to
If successful, this combination could offer a new treatment option for people with neuroendocrine tumors that have spread to the liver and are not responding to standard care.
What could go wrong
This is a small pilot study with only 32 participants, so results may not apply to everyone. Combining immunotherapy with radiation or liver procedures can increase side effects, and the added benefit over existing treatments is not yet proven.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

Contacts and locations

Locations

  • University of California, San Francisco

    San Francisco, California, 94143, United States

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