[Muscular botryomycosis in the rectus abdominis muscle: imaging findings]

Botryomycosis is a rare chronic suppurative granulomatous bacterial infection of the skin and viscera. It is classified into 2 groups: the visceral type and the cutaneous type, which can lead to involvement of contiguous muscle and bone, as appears probable in this case. We present a rare case of muscular botryomycosis in the rectus abdominis muscle in a patient with a history of abdominal wall surgery. Botryomycosis was initially mistaken for a soft-tissue tumor; after surgical resection it was diagnosed as muscular botryomycosis. We describe the clinical presentation and the imaging characteristics of this rare entity.