has characteristic has characteristic invasive ductal breast carcinoma ICD9:174.8 invasive ductal carcinoma, NST DOID:3008 invasive ductal adenocarcinoma NCIT:C4194 infiltrating ductal carcinoma of the breast SCTID:408643008 infiltrating ductal carcinoma ICDO:8500/3 ICDO:8521/3 UMLS:C1412014 invasive ductal carcinoma infiltrating ductal carcinoma of breast invasive ductal carcinoma of breast The most common type of invasive breast carcinoma, accounting for approximately 70% of breast carcinomas. The gross appearance is usually typical with an irregular stellate outline. Microscopically, randomly arranged epithelial elements are seen. When large sheets of malignant cells are present, necrosis may be seen. With adequate tissue sampling, in situ carcinoma can be demonstrated in association with the infiltrating carcinoma. The in situ component is nearly always ductal but occasionally may be lobular or both. MONDO:0004953 invasive ductal carcinoma of the breast invasive ductal breast carcinoma breast invasive ductal carcinoma infiltrating ductal adenocarcinoma MEDGEN:730612 infiltrating ductal breast carcinoma ONCOTREE:IDC EFO:0000186 invasive ductal carcinoma, No specific type breast ductal adenocarcinoma invasive breast carcinoma neoplastic, invasive