In year Y, the patient was diagnosed with invasive ductal carcinoma of the right breast, characterized as ER-positive (> 90%), PgR-positive (> 90%), human epidermal growth factor receptor 2 (HER2)-positive confirmed by fluorescence in situ hybridization (FISH), and the Ki-67 index was 16.3%. The gene discussed is ERBB2; the disease is invasive ductal breast carcinoma.