A case report of granulomatous mastitis with erythema nodosum

Abstract

We report a 28-year-old woman with granulomatous mastitis (GM) and erythema nodosum (EN). Post partum, the patient developed a painful, elastic hard mass located in her right breast. On histology, granulomatous mastitis with erythema nodosum was diagnosed. She was treated with oral steroids, antibiotics, and surgical drainage. The skin lesions improved rapidly. The breast lesion improved gradually ; it disappeared five months after the start of treatment. Based on a review of the literature, 6 cases of GM with EN have been reported in Japan.