Abstract
Sanchez-Vega and colleagues prospectively demonstrate that both intra- and intertumoral differential expression of the receptor tyrosine kinases HER2, EGFR, and MET dictate sensitivity to the pan-HER inhibitor afatinib in a phase II trial of trastuzumab-refractory HER2-amplified gastroesophageal adenocarcinomas. Rapid autopsy, tissue-based genomic characterization, and molecular imaging provide complementary information and may aid in selecting optimal patients for targeted monotherapy versus combination approaches in gastroesophageal adenocarcinomas.See related article by Sanchez-Vega et al., p. 199.
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