Ｗｉｎｄｓｗｅｐｔ ｄｅｆｏｒｍｉｔｙに対し両側ＴＫＡを施行した１例

Abstract

We report a case of windswept deformity. Windswept deformity is characterized by varus and valgus deformity in the knees. A 77-year-old female had been suffering from gonalgia and deformity. She had no abnormal laboratory data but had a habit of sitting on her legs with her right knee valgus and left varus. Watanabe insisted that sitting on legs with the right knee valgus and left knee varus is a cause of this deformity. So we gathered information on sitting posture by conducting a questionnaire survey on 300 subjects (100 young females, 100 elderly women without osteoarthrosis in their knees, and 100 elderly women with osteoarthrosis in their bilateral knees). Most of these subjects presented the same results regardless of age and osteoarthrosis, indicating that many women are thought to sit in the same position for a long time. Sitting habit is considered not to be a cause but a risk or worsening factor. In this case, the patient was treated by bilateral TKA. Histological examination showed degeneration and fibrosis. We considered gonarthrosis to cause this deformity. By bilateral TKA, her legs became straight and she gained walking ability without pain. Satisfactory results were achieved in a short term.