ERBB2 and neoplasm: Patients less than 50 years had more ER+/PR+ (51% vs. 31%), Luminal A (67% vs. 57%) and Luminal B tumours (10% vs. 8%) and a lower prevalence of ER−/PR− (23% vs. 36%), Her-2+/ER− (10% vs. 14%) and basal like tumours (9% vs. 17%) [20].