ERBB2 and neoplasm: Our study corroborates these findings, revealing a frequent positive family history (14.4%), BRCA gene mutations (20.4%), relatively large tumor size (3.5 cm), frequent multiplicity (22.0%), positive LVI (43.8%), negative-HER2 expression (87.9%), and a higher proportion of TNBC (28.0%) than those measured in previous reports of YBC under 35 or 40 years of age [17,23].