PMC3899173_01
Classic degenerative changes at hip joint.
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The radiographic examination revealed an irregularity of the femoral head, narrowing of the hip joint space, and severe joint degeneration (Figure 1).
Dark, hard and thickened capsule with femoral head-neck.
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Although the capsule was completely excised posteriorly, the dislocation of the femoral head was quite difficult (Figure 2).
Cartilage pigmentation and histiocytic giant cell reaction (HE x40).
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The histopathological examination of the remains of the bone and soft tissue removed during surgery revealed multiple pigmented areas, reactive giant cells, and thickened and inflamed synovium, which are the classic findings of ochronosis (Figure 3).
Well integrated and positioned component.
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The radiological evaluation revealed a very good position of the prosthesis components (Zimmer, USA) (Figure 4).