Fig. 21.

Septic hip effusion with extensive soft tissue infection and abscess. a Fluid and gas are present in the left hip joint. The joint space is widened and there is osseous destruction and fragmentation along the margins of the acetabulum. Numerous rim-enhancing abscesses are present surrounding the hip and within the soft tissues of the proximal left thigh, (white arrows). b Marked asymmetry of the lower extremities with enlargement of the left leg and a large soft tissue abscess in the medial left thigh (white arrows)