IDC represents ~70% of all invasive
carcinomas of the breast. Carcinoma
cells invade in the tumor stroma, form a variable pattern of glandular
or grow as solid sheets or nests. Epithelial cells are morphologically
which form the basis of differentiating carcinoma from radial scar and
adenosis.The tumor is classified as IDC when features of special
subtypes are not present, or present in a minority of the tumor.