A Rare Cause of Breast Mass: Granular Cell Tumor

Granular cell tumor is a rare type of soft tissue tumor originated from Schwann cells and often affecting head and neck region. Granular cell tumor, which may have many different organ involvements in the body, can rarely observed in breast tissue. A 57-year-old postmenopausal woman underwent excisional biopsy in another health facility due to a palpable rapidly growing painless mass on her left breast. Re-excision with wide surgical margins was performed to the patient whose biopsy was reported as granular cell tumor of breast with positive surgical margin. Postoperative follow-up was uneventful, and the patient was discharged without complication. Wide local excision should be performed to prevent local recurrence in the surgical treatment of granular cell breast tumor, which is similar to breast carcinoma in both radiological and clinic appearance. In this case report, we aimed to present diagnosis and treatment of granular cell tumor with current literature knowledge