To verify YAP1 translocation and the upregulation of EGFR expression in preclinical models, we stained YAP1 and EGFR in tumor tissues of two patient‐derived xenografts (PDX), namely, PDX1 and PDX2, that were treated with trametinib in NSG mice and showed tumor growth delay [27]. The gene discussed is EGFR; the disease is neoplasm.