Metaplastic Carcinoma of Breast with an Intracanalicular Fibrodenoma-A Rare Case Report

Metaplastic Carcinoma of Breast with an Intracanalicular Fibrodenoma-A Rare Case Report

Fibroadenomas are benign tumors that are labeled under the group proliferative lesions without atypia. Carcinoma arising de novo in fibroadenoma is rare. Presence of carcinoma within fibroadenoma is usually a secondary involvement from adjacent carcinoma. Incidence of a carcinoma evolving within a fibroadenoma is reported to be 0.002-0.0125%. Complex fibroadenoma and proliferative disease adjacent to the fibroadenoma are associated with a slight increase in the risk of breast cancer. But there are no clinical or mammographic features that have value in the diagnosis of carcinoma within a fibroadenoma until breach of false capsule. Metaplastic breast carcinoma arising in a fibroadenoma is a rare incidental finding. The etiology of this rare type of breast cancer is unknown.