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': 'A 56-year-old male patient develops an accentric hard breast lump over the past few months and a biopsy proves this to be breast carcinoma. Of all breast cancers, the rate of occurrence in males is which of the following? \nSelect and explain. \nA. <1%, B. 4%, C. 7%, D. 10%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cancer of the breast in males constitutes <1% of total cases. It tends to present at a more advanced stage in men than in women, because it is often overlooked. It may easily be confused with the more commonly occurring condition of gynecomastia. Careful clinical radiological follow-up studies are indicated.', 'role': 'assistant'}]