ERBB2 and tumor of uterus: We observed the same pattern in 17q arm-level gain and amplification (Additional file 12A): 51% (n = 50) of non-breast HER2A tumors have focal HER2 amplification on top of a largely diploid 17q, 48% (n = 47) show additional arm-level gain, and one uterine tumor only has arm-level amplification.