“…Although mild forms of Morquio disease tend to be misdiagnosed as disorders of the hip, such as Perthes' disease (Fang-Kircher et al 1995), in cases of bilateral coxarthropathy, bone dysplasia should be suspected first, and radiographs of other joints, spine, hands, and feet, along with physical examination and family history, should be studied. We believe ophthalmoscopic examination is important.…”