ERBB2 and neoplasm: Statistical analysis of the data was carried out in order to detect any existing significant correlation between the differential expression of the variants A and E (presence or not, low or high number of copies) with clinicopathological characteristics of the samples and the patients (such as age group, tumor size, histopathological type of tumor, lymph nodes involvement, grade, metastasis, hormone receptors status, HER2 oncogene overexpression, TNBC status).