<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>: Carcinoma of the breast is divided into :Carcinoma in situ neoplastic cells is limited to ducts and lobules by the basement membrane.Invasive carcinoma infiltrating carcinoma cells invade beyond the basement membrane.Caricnoma in situ :It is of two typesA. Ductal carcinoma insitu DCIS, intraductal carinoma Most frequently present as manzmographic calcification.Rarely palpable mass may also occur in comedocarcinoma.DCTS is of two types -i. Comedocarcinomaii. Noncomedo DCTS Solid, cribriform, papillary or micropapillaryB. Lubular carcinoma in Situ LCISAlways an incidental finding in a biopsy performed for another reason.LCIS is not associated with calcification Therefore, it remains infrequent with or without mammography in contrast to DCISFrequently multicentric and bilateralSignet ring cells are common. 