Idiopathic granulomatous mastitis: rare but important.

A 61-year-old woman attended the breast clinic with unresolving mastitis and an associated mass, following failed treatment with antibiotics. Triple assessment confirmed idiopathic granulomatous mastitis. Unresponsive to further conservative management and steroid therapy, she underwent surgical excision and made uneventful recovery. No evidence of recurrence was detected at 18 months follow-up.