Granular cell tumour of the breast: MRI findings and review of the literature.

Granular cell tumours (GCTs) are uncommon, usually benign neoplasms that can mimic malignancy on breast imaging. GCTs can originate anywhere in the body but are most frequently found in the head and neck area, particularly in the oral cavity. When occurring in the breast, as occurs in 5-8% of all cases of GCT, the clinical presentation is similar to that of a primary breast carcinoma. We report a case of granular cell tumour of the breast presenting as a suspicious lesion on breast imaging, and review the MRI features of GCTs.