glandular tumor ductal intra-epithelial neoplasia DIN Ductal carcinoma in situ MIN MPATH:486 Pre-malignant hyperplastic and/or dysplastic change in the mammary gland epithelium with the potential to give rise to malignant tumors. This term covers the range of DIN (MIN) including severe intra-epithelial neoplasia (IENIII), alternatively termed in situ carcinoma of the mammary ductal epithelium. (M- 8500/2). See Tavassoli FA. (1998) Mod Pathol. 11:140-54. Ductal carcinoma in situ: introduction of the concept of ductal intraepithelial neoplasia for further definition. intraductal adenocarcinoma, non-infiltrating mammary intra-epithelial neoplasia mouse_pathology.ontology potentially cancerous lesions