Goldman A B, Hallel T, Salvati E M, Freiberger R H
Radiology. 1976 Dec;121(3 Pt. 1):561-6. doi: 10.1148/121.3.561.
Osteochondritis dissecans of the femoral head occurs as a rare complication in the late onset of Legg-Perthes disease. The etiology of this complication is uncertain. Theories include: (a) persistence of an ununited fragment and (b) fragmentation of the femoral head weakened by revascularization accompanying healing. The area of osteochondritis dissecans may not be readily apparent on routine radiographs and a high index of suspicion is necessary for diagnosis. Four cases of osteochondritis dissecans of the hip presenting 6--18 years after the diagnosis of Legg-Perthes disease are described. Three patients were studied by arthrography, and the findings correlated well with symptomatology.
股骨头剥脱性骨软骨炎是Legg-Perthes病晚期罕见的并发症。这种并发症的病因尚不确定。理论包括：(a)未愈合碎片的持续存在；(b)伴随愈合的再血管化使股骨头变弱而发生碎裂。常规X线片上可能不容易看出剥脱性骨软骨炎的区域，诊断时需要高度怀疑。本文描述了4例在Legg-Perthes病诊断后6至18年出现的髋关节剥脱性骨软骨炎病例。对3例患者进行了关节造影检查，检查结果与症状表现密切相关。
