Cystic neutrophilic granulomatous mastitis with corynebacterium and staphylococcus mimicking breast carcinoma.

Cystic neutrophilic granulomatous mastitis (CNGM) is an increasingly recognized entity in the differential diagnosis of granulomatous inflammation involving the breast. We present the first case report of CNGM mimicking carcinoma of the breast with two mixed bacterial species as the causative pathogens (Corynebacterium and Staphylococcus spp.).