Invasive ductal carcinoma. Definition

Medical Definition: Invasive ductal carcinoma

Most common type of invasive breast cancer. It begins in cells lining the milk ducts (mammary) of the breast, grows outside the ducts, and often spreads to the lymph nodes, invading the fatty tissue of the breast. When it reaches this point, has the potential to spread (metastasize) to anywhere in the breast, as well as other parts of the body through the bloodstream and lymphatic system. Invasive ductal carcinoma is the most common type of breast cancer and accounts for 80% of malignant breast conditions. Also known as infiltrating ductal carcinoma.

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