This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
The type of mammary ductal carcinoma is situ (DCIS) most likely to result in a palpable abnormality in the breast is 
Select and explain. 
A. Apocrine DCIS, B. Neuroendocrine DCIS, C. Well differentiated DCIS, D. Comedo DCIS
D: Comedo DCIS
Answer: D: Comedo DCIS 
Explanation: Ans. is 'd' Comedo DCIS Ductal carcinoma in situ (DCIS) can be divided into two types : Comedo carcinomas and Non-comedocarcinomas DCIS are usually detected as calcifications on mammography but comedo carcinomas can present as palpable nodules.