In terms of breast tumors, malignant neoplasms had the highest frequency, accounting for 42.3% (587/1387) of the total, followed by triple-negative breast neoplasms (56/1387, 4%) and human epidermal growth factor receptor 2 (HER2)–positive carcinoma of breast (54/1387, 4%; Table 1 and Multimedia Appendix 2). The gene discussed is ERBB2; the disease is cancer.