Radiologic Mimics of Osteomyelitis and Septic Arthritis: A Pictorial Essay

Figure 8

Two cases of rapidly progressive hip osteoarthritis. X-ray (a) and coronal STIR (b) of a 78-year-old man presenting with an increasingly painful and stiff left hip, demonstrating left hip joint effusion, joint marrow oedema signal, and flattening of the femoral head. Joint aspirate and subsequent washout were negative for infection. Coronal T1 (c) of a second patient with coronal STIR (d) performed 2 months apart shows the rapidly progressive nature of this condition, with hatchet-like deformity of the femoral head in the latter study (d arrow) due to subchondral insufficiency fracture.

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