Invasive ductal carcinoma (IDC) begins when abnormal cells form in your milk ducts and spread to other parts of your breast tissue. It’s the most common type of breast cancer, making up about 80% of all breast cancer cases.
Invasive ductal carcinoma. Like ductal carcinoma in situ, it begins in the milk ducts of the breast. But unlike DCIS, invasive ductal carcinoma is not contained. Instead, it grows through the duct walls and into the surrounding breast tissue.
Ductal carcinoma in situ (DCIS) means that the cancer cells are still contained in your milk ducts. Invasive ductal carcinoma (IDC) means that the cancer has begun to spread to (or invade) your surrounding breast tissue.
In approximately 5% to 10% of breast cancer cases, invasive ductal carcinoma has been linked to hereditary factors. These include mutations of the breast cancer gene 1 (BRCA1), breast cancer gene 2 (BRCA2) and other genes such as PALB2, CHEK2 and ATM.
For diagnostic terms in the pathology report which are not part of the following list, refer to your ICD-O -3 manual.
Synonyms for carcinoma in situ: noninfiltrating, intraductal, lobular carcinoma in situ, Stage 0, noninvasive, no stromal involvement, papillary intraductal, papillary non infiltrating, intracystic, lobular neoplasia, lobular noninfiltrating, confined to epithelium, intraepithelial, intraepidermal