Here we report on EphA2 expression in well characterized and clinically annotated patient derived xenografts (PDX) of NSCLC including EGFR mutant NSCLC derived either from erlotinib or osimertinib resistant patients. BCY6033 is a potentially promising drug effective against EphA2 expressing PDX models. Future studies and clinical trials will seek to determine the efficacy of BT5528 in EphA2 expressing tumors.