Breast Cancer Directory, Breast Care, Breast Disease- Invasive Ductal Carcinomahttp://www.breastportal.com/invasive-ductal-carcinoma/Site description IDC - Invasive Ductal Carcinoma http://www.breastcancer.orgInvasive ductal carcinoma, or IDC, accounts for about 80% of all breast cancers. Invasive means that it has "invaded" or spread to the surrounding tissues.Tue, 07 Sep 2010 09:06:53 GMTTypes of breast cancer - MayoClinic.com http://www.mayoclinic.comInvasive 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.Tue, 07 Sep 2010 09:06:53 GMT