Abstract
Fibroadenoma is a common benign tumor of the breast and demands to be differentiated from breast cancer. Most fibroadenomas can be diagnosed by palpation and image procedure, and are often observed the clinical course without resection. Through it is very rare, cases of breast cancer in fibroadenoma have been reported in the world. This paper deals with our experience with a case of minute breast cancer arisen in a fibroadenoma that is the 20th case report in Japan, together with a review of the literature. A 43-year-old woman underwent a biopsy for a breast tumor. Preoperative diagnosis was fibroadenoma. At operation the tumor was found to be fibroadenoma except a small part that was invasive ductal carcinoma.
