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IDC - Invasive Ductal Carcinoma Invasive ductal carcinoma, or IDC, accounts for about 80% of all breast cancers. Invasive means that it has "invaded" or spread to the surrounding tissues.
Types of breast cancer - MayoClinic.com Invasive ductal carcinoma (IDC). IDC accounts for the majority of invasive breast cancers. If you have IDC, cancer cells form in the lining of your milk ducts.
