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: Pathology
Type of DCIS resulting in palpable abnormality 
Select and explain. 
A. Comedocarcinoma, B. Non comedo DCIS, C. Paget's disease, D. None
C: Paget's disease
Answer: C: Paget's disease 
Explanation: Paget disease of the nipple is caused by the extension of DCIS up the lactiferous ducts and into the contiguous skin of the nipple, producing a unilateral crusting exudate over the nipple and areolar skin. In almost all cases, an underlying carcinoma is present, and approximately 50% of the time this carcinoma is invasive. Prognosis is based on the underlying carcinoma and is not affected by the presence of Paget disease ref : Robbins Basic Pathology, 9E,page-710