Granular Cell Tumor: A Case Report

Granular cell tumor (GCT) of the breast is a rare neoplasm. These tumors are most commonly found on the tongue (40% of cases); only 5-6% of GCTs occur in the breasts. A 46-year-old woman presented with recent onset of a palpable lump, confirmed by mammography and sonography, in the axillary tail of the left breast. Imaging findings were highly suspicious for breast neoplasm. Anatomic pathology findings were descriptive and inconclusive, revealing proliferation of cells with granular eosinophilic cytoplasm. The recommended treatment for GCT is wide local excision, and there are no data to support adjuvant radiation or chemotherapy.