Hypertrophy of Breast, also known as excessive development of breast, is related to aromatase excess syndrome and gynecomastia. An important gene associated with Hypertrophy of Breast is ERBB2 (Erb-B2 Receptor Tyrosine Kinase 2), and among its related pathways/superpathways are Prolactin Signaling and PIP3 activates AKT signaling. The drugs Bupivacaine and Anesthetics have been mentioned in the context of this disorder. Affiliated tissues include breast and skin, and related phenotypes are Decreased viability and Increased cell death in HCT116 cells