<prompt> The type of mammary ductal carcinoma in situ DCIS most likely to result in a palpable abnormality in the breast is:Apocrine DCISNeuroendocrine DCISWell differentiated DCISComedo DCIS  <response>: Before the use of screening mammography, ductal carcinoma in situ DCIS typically presented as a palpable mass or nipple discharge. Ref: Robbins Basics of Pathology , 7th Edition, Page I139; Management of Breast Diseases By Ismail Jatoi, Manfred Kaufmann, 2010, Page 206; Perez and Bradys Principles and Practice of Radiation Oncology By Edward C. Halperin, Carlos A. Perez, Luther W. Brady, 2008, Page 438. 