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Condition Guide

New Treatments & Clinical Trials for Endometrial Cancer

Last updated May 2026Data from ClinicalTrials.gov572 active trials
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Endometrial cancer — cancer of the uterine lining — is the most common gynecologic cancer in developed countries and is rising in incidence, partly linked to increasing obesity rates. Most cases are caught early when surgery is curative, but advanced or recurrent disease has historically had limited options.

What's actually going on in research

Checkpoint immunotherapy has become a cornerstone for mismatch repair-deficient (MSI-H/dMMR) endometrial cancers, and pembrolizumab-based combinations have improved outcomes broadly across molecular subtypes. Antibody-drug conjugates targeting HER2 and other surface proteins are showing strong activity in specific subtypes. Molecular classification — into POLE-mutated, dMMR, copy-number-low, and copy-number-high groups — now guides treatment decisions and is a major focus of ongoing trials.

Checkpoint immunotherapy

PD-1 inhibitors are now combined with chemotherapy as standard therapy for advanced endometrial cancer, with particularly strong responses in dMMR tumors. Trials are testing them in earlier-stage disease.

Antibody-drug conjugates

Drugs targeting HER2, folate receptor alpha, and other proteins overexpressed in endometrial cancer are in active trials, offering options for platinum-resistant and recurrent disease.

Molecular subtype treatment

Trials are prospectively testing whether POLE-mutated and other specific subtype patients can safely de-escalate treatment, and whether FGFR3-targeted drugs benefit the copy-number-high group.

What to know before you search

Eligibility depends on stage, molecular subtype (POLE, dMMR, FGFR3), HER2 status, and prior platinum-based chemotherapy.

What types of trials are currently open

  • Treatment trialsTesting new drug combinations or immunotherapy for advanced, recurrent, or metastatic endometrial cancer.
  • Adjuvant trialsTesting post-surgery chemotherapy, radiation, or immunotherapy for high-risk early-stage disease.
  • Molecular subtype trialsTesting de-escalation or targeted therapy based on molecular classification.
  • Surgical trialsComparing minimally invasive surgical approaches and sentinel lymph node biopsy techniques.
  • Supportive care trialsManaging sexual function, lymphedema, and other treatment effects.

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