Fibromatosis (desmoid tumor) of the breast mimicking a case of ipsilateral metachronous breast cancer.
BACKGROUND
Fibromatosis or desmoid tumor of the breast is an extremely rare entity. While it lacks a metastatic potential, it can grow aggressively in a locally infiltrating pattern. The failure to recognize this as a finite entity within the breast can lead to local recurrence after incomplete excision.


METHODS
We report a case of a 70 year old patient with a remote history of invasive breast cancer (treated twelve years earlier by lumpectomy, axillary lymph node dissection, postoperative radiation therapy, and five years of tamoxifen) who developed fibromatosis within another quadrant of the same breast that clinically, mammographically, and sonographically mimicked that of the development of an ipsilateral metachronous breast cancer. After the initial diagnosis of fibromatosis was made on a minimally invasive ultrasound guided biopsy, it was successfully treated by wide local excision.


CONCLUSIONS
After appropriate recognition, wide local excision can be the appropriate surgical management strategy for fibromatosis of the breast.
Povoski
Stephen P
SP
Division of Surgical Oncology, Department of Surgery, The Arthur G. James Cancer Hospital and Richard J. Solove Research Institute and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio 43210, USA. stephen.povoski@osumc.edu
Jimenez
Rafael E
RE