EGFR and adenosarcoma: When PTs were stratified according to grade, no regions were significantly differentially altered between benign PTs and adenosarcomas (Fisher's exact tests, P > 0.05; Fig. S3A,B), whereas a focal region on 7p11.2 including EGFR was significantly more frequently amplified in malignant PTs than in adenosarcomas (30% vs 0, Fisher's exact tests, P = 0.0328, Fig. S3C,D).