Lobular carcinoma in situ (LCIS, lobular neoplasia): The term, “in situ,” refers to extent of threshold level. LCIS, thus has high chance to develop into frank BC. LCIS is a sharp increase in the number of cells within the milk glands (lobules) of the breast. Many physicians do not classify LCIS as breast cancer and often encounter LCIS by chance on breast biopsy while investigating an area of concern.
Ductal carcinoma in situ (DCIS):
DCIS, the most common type of non – invasive breast cancer, is confined to the ducts of the breast. DCIS is often first detected on mammogram as microcalcifications (tiny calcium deposits).
Infiltrating lobular carcinoma (ILC):
ILC is also known as invasive lobular carcinoma. ILC begins in the milk glands (lobules) of the breast, but often spreads (metastatizes) to other regions of the body. ILC accounts for 10% to 15% of breast cancers.
Infiltrating ductal carcinoma (IDC):
IDC is also known as invasive ductal carcinoma. IDC begins in the milk ducts of the breast and penetrates the wall of the duct, invading the fatty tissue of the breast and possibly other regions of the body. IDC is the most common type of breast cancer, accounting for 80% of brest cancer diagnoses.
Medullary carcinoma is an invasive breast cancer that forms a distinct boundary between tumor tissue and normal tissue. Only 5% of breast cancers are medullary carcinoma.
Also called colloid carcinoma, mucinous carcinoma is a rare breast cancer formed by the mucus- producing cancer cells. Women with mucinous carcinoma generally have a better prognosis (expected outcome) than women with more common types of invasive carcinoma.
Tubular carcinomas are a special type of infiltrating (invasive) breast carcinoma. Women with tubular carcinoma generally have a better prognosis (expected outcome) than women with more common types of invasive carcinoma. Tubular carcinomas account for around 2% of breast cancer diagnoses.
Inflammatory breast cancer:
Inflammatory breast cancer is the appearance of inflamed breasts (red and warm) with dimples and/or thick ridges caused by cancer cells blocking lymph vessels or channels in the skin over the breast. Though inflammatory breast cancer is rare (accounting for only 1% of breast cancers), it is extremely fast-growing.
Paget’s disease of the nipple:
A rare form of breast cancer that begins in the milk ducts and spreads to the skin of the nipple and areola, Paget’s disease of the nipple only accounts for about 1% of breast cancers. The breast skin may appear crusted, red, or oozing in women’s prognosis may be better if nipple changes are the only sign of the breast disease and no lump is felt.
Phylloides tumors (also spelled “phyllodes”) are be either benign (non – cancerous) or malignant (cancerous). Phylloides tumors develop in the connective tissues of the breast and may be treated by surgical removal. Phylloides tumors are very rare.