PMC3876680_01
(a, b) Joint narrowing and multiple bone erosions of the hip joint are seen on this roentgenogram.
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X-ray images showed joint narrowing and multiple bone erosions of the left hip joint (Figure 1).
(a, b) Computed tomography image showing the femoral neck and acetabular bone erosions, and area of bone necrosis (arrow). (c) Magnetic resonance image showing a typical low-intensity band of osteonecrosis of the femoral head (arrowhead) and mass lesions (arrows) around the femoral neck on T1-weighted imaging. (d) The patient underwent total hip arthroplasty with complete synovectomy and tumor resection using an argon laser.
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Computed tomography (CT) clearly showed femoral neck and acetabular bone erosions as well as ONFH (Figures 2(a) and 2(b)). T2-weighted fat-suppressed MR imaging also revealed an irregular tumoral lesion (Figure 2(c)). The patient subsequently underwent total hip arthroplasty (THA) (KYOCERA Medical Corporation, Osaka, Japan) with complete synovectomy and tumor resection using an argon laser (Figure 2(d)).