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Stress fracture of the hip as a complication of total knee replacement. Case report.

An eighty-three-year-old white woman underwent a right tolal knee replacement in September 1979 because of severe osteoarthritis. There were no postoperative complications and the patient was discharged, arterial blood gases, automated profiles of electrolytes and liver functions, blood-cell count and profiles, and urinalysis were all within normal limits. The patient did well until January 1980. when she was seen by us with a two-week history of pain in the right hip. She had been using a cane outdoors but walked with no assistive devices indoors. The pain had begun spontaneously while she was walking and there was no history of trauma. A physical examination revealed tenderness over the adductor ten dons of the right hip, with pain at the limits of motion. The right hip showed full extension, 100 degrees of flexion, and 10 degrees of abduc tion and adduction. Radiographs of the right hip and knee at that time