Invasive Lobular Carcinoma (ILC)
Invasive Ductal Carcinoma (IDC)
- Also known as infiltrating ductal carcinoma
- Most common type of breast cancer
- Starts in the ducts of the breast, then grows into fatty breast tissue
- May also spread to other parts of the body through the lymph system and bloodstream
- Approximately 8 out of 10 invasive breast cancers are invasive ductal carcinomas
- Invasive ductal cancer, also known as infiltrating ductal carcinoma, is the most common form of breast cancer; it accounts for 50% to 70% of invasive breast cancers.
- When invasive ductal carcinomas take on differentiated features, they are named according to the features that they display. If the infiltrating cells form small glands lined by a single row of bland epithelium, they are called infiltrating tubular carcinoma. The infiltrating cells may secrete copious amounts of mucin and appear to float in this material. These lesions are called mucinous or colloid tumors. Tubular and mucinous tumors are usually low-grade (grade I) lesions; these tumors each account for approximately 2% to 3% of invasive breast carcinomas.

Invasive breast cancer. A, Invasive ductal carcinoma, not otherwise specified. The malignant cells invade in haphazard groups and singly into the stroma. B,Invasive lobular carcinoma. The malignant cells invade the stroma in a characteristic single-file pattern and may form concentric circles of single-file cells around normal ducts (targetoid pattern). C, Invasive tubular carcinoma. The cancer invades as small tubules, lined by a single layer of well-differentiated cells. D, Mucinous or colloid carcinoma. The bland tumor cells float like islands in lakes of mucin. E, Medullary carcinoma. The tumor cells are large and very undifferentiated, with pleomorphic nuclei. The distinctive features of this tumor are the infiltrate of lymphocytes and the syncytium-appearing sheets of tumor cells.dd your own text and edit me. It's easy.