Shaping the future of HER2-directed therapy in biliary tract cancer.

Fitzpatrick, Orla M; Harding, James J · Clin Cancer Res · 2026

editorial · Level V

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Abstract

This commentary on a retrospective study of patients with HER2 positive biliary tract cancer highlights the importance of reflex and validated HER2 testing criteria; the discordance of next generation sequencing and HER2 immunohistochemistry; the potential prognostic and predictive role of HER2; and the necessity to define HER2 therapy resistance mechanisms.