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': 'Pagets disease of breast is associated with which of the following? \nSelect and explain. \nA. Ductal carcinoma in situ, B. Lobular carcinoma in situ, C. Phyllodes tumor, D. Mondors disease', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Ductal carcinoma in situ * Paget disease of the nipple is a rare manifestation of breast cancer - 1% to 4% of cases.* It presents as a unilateral erythematous eruption with a scale crust. Pruritus is common, and the lesion may be mistaken for eczema.* Malignant cells (Paget cells) extend from ductal carcinoma in situ (DCIS) within the ductal system via the lactiferous sinuses into nipple skin without crossing the basement membrane.", 'role': 'assistant'}]