A rare case of granulomatous mastitis by species.

Granulomatous mastitis (GM) is a rare, chronic, benign inflammatory disease of the breast. Here, we present a rare case of GM caused by brucellosis and present the first review to compile the cases in the literature. The diagnosis was confirmed by the patient's serological and histopathological results. The patient was successfully treated with doxycycline+rifampicin combination therapy for six weeks. In conclusion, infectious agents, especially brucellosis, should be considered in the differential diagnosis of GM in endemic regions. Diagnostic methods, such as tissue culture and serological tests, should be used to detect possible infectious agents if necessary.