:a Case Report

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A seventeen year-old boy complained of pain in the left elbow without any cause. Two days later he noticed disability of extension of the left fingers and thumb. The pain was improved in two weeks but there was no change in the motor disturbance.On examination six weeks after the onset there was paralysis of the extension of the all fingers of the left hand and paralysis of abduction and extension of the left thumb. There was tenderness on pressure over the course of the posterior interosseous nerve, just below the elbow joint.Eight weeks after the onset the posterior interosseous nerve was explored. The nerve was covered by a thin membranous band just proximal to the Frohse's arcade and under the band two narrow constrictions of the nerve was found.Proximal to the band the nerve was found to be oedematous and there was one more sausage-like constriction about 1cm below the elbow joint. The cause of the constrictions could not be found macroscopically and microscopically. Tendontransfer was carried out.During the postoperative fixation paralysis of the anterior interosseous nerve has occured. The cause of this paralysis remained unknown. Fortunately, recovery of the paralysis is occurring.
西日本整形・災害外科学会の論文