Granular cell tumor of the breast in a male patient.

Abstract

Granular cell tumor (granular cell myoblastoma) is an unusual benign soft-tissue neoplasm, usually appearing in the tongue, the oral cavity, or subcutaneous tissue. This tumor has been occasionally reported in the breast as a mimic of carcinoma on physical examination and by mammography, sonography, and gross inspection of the resected specimen [1]. Rare examples of granular cell tumors in the male breast have been documented [2, 3]. We describe a case of granular cell tumor of the breast in a male patient in whom clinical impression and radiologic findings indicated possible malignancy. Histologic sections led to a correct diagnosis of benign tumor, thus preventing unnecessary mastectomy or axillary dissection.