Neoplasms, usually carcinoma, located within the center of an organ or within small lobes, and in the case of the breast, intraductally. The emphasis of the name is on the location of the neoplastic tissue rather than on its histological type. Most cancers of this type are located in the breast.

Synonyms: Neoplasms, Ductal, Lobular, and Medullary, Ductal, Lobular, and Medullary Neoplasms