CytomX reports positive phase 1 data for colorectal cancer treatment

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CytomX’s Varsetatug Masetecan (EpCAM PROBODY® ADC) Continues to Demonstrate Positive Data Supporting Potential as a New Treatment Option in Late-Line Colorectal Cancer

March 16, 2026 7:00 AM EDT

- Confirmed response rates in expansion cohorts of 32% at 10 mg/kg Q3W dose and 20% at 8.6 mg/kg Q3W -

- Estimated progression free survival of 7.1 months at 10 mg/kg and 6.8 months at 8.6 mg/kg -

- Grade 3 diarrhea rate of 10% in ongoing dose optimization cohorts -

- FDA interactions targeted for mid-year with goal to align on potential registrational trial design in late-line colorectal cancer (CRC) -

- Phase 1 study evaluating combination... More