Benign granular-cell tumour of the breast

Granular cell tumour (GCT) is a rare lesion of putative Schwann’s cell origin. It affects many organs, including the breast. Recognition of this usually benign tumour is important, since clinically, radiogically and grossly, GCT of the breast often mimics carcinoma. Histologically, tumour cells are abundant, with eosinophilic cytoplasmic granules and round nuclei. Here we report the case of a 70-year-old woman with a benign GCT of the breast, of interest for its rarity and her family history of breast cancer. We also review the literature on GCT of the breast.