This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
[{'content': 'All the statements are true for medullary carcinoma breast except? \nSelect and explain. \nA. Associated with BRCA-2., B. Usually triple negative, C. Axillary lymph node enlargement bacause of reactive hyperplasia, D. Lymphoreticular infiltration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Medullary carcinoma of breast Invasive breast cancer 5% of breast cancers Associated with BRCA-1 Axillary lymph node enlargement bacause of reactive hyperplasia Lymphoreticular infiltration Electron M/E - Bizarre cells with high-grade nuclear features Syncytial pattern -Sheets of cells surrounded mononuclear lymphocytes. Borders push into the adjoining breast tissue In its pure form, High grade, Triple negative - ER and PR negative,Her-2-neu negative', 'role': 'assistant'}]