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Combined anatomical and radiological study of the hip-joint in alcaptonuric arthropathy.

In two patients with alcaptonuric arthropathy, we have had the opportunity of investigating three femoral heads which had been surgically removed to be replaced by a total prosthesis. This allowed us to study the osteoarthrotic remodelling of epiphyses in which damaged cartilage is labelled by pigment. This exceptional condition facilitates study of the fate of this cartilage among newly-formed tissues.