ERBB2 and invasive breast carcinoma: Among the invasive breast cancer cases, 1.2% lacked information on tumour size, 0.3% on lymph nodes status, 6.4% on distant metastasis status, 10% on histological grade, 2.9% on ER status, 3.1% on PgR status, 22% on HER2 and 37% on Ki-67.