53-year-old man status post below-knee amputation. Evaluate for osteomyelitis. There has been amputation through the Chopart joint. There is soft tissue ulceration and irregularity along the anterior margins of the talus and calcaneus, with several foci of gas within the subcutaneous soft tissues and associated abnormal bone marrow signal consistent with osteomyelitis. The tendons of the ankle are grossly normal, although muscle atrophy is noted.
Osteomyelitis affecting the anterior aspects of the talus and calcaneus.