Breast lumps: a rare site for rheumatoid nodules.

Granulomatous mastitis (GM) of the breast is a rare benign inflammatory disease and its presentation closely mimics breast cancer. Its diagnosis is mainly based on histology and there is no consensus agreement regarding its management. We report a case of a 60-year-old woman presenting with a right breast lump associated with a history of rheumatoid arthritis and raised rheumatoid factor. Following triple assessment (history and examination, imaging and biopsy), GM was diagnosed and she was treated conservatively.