Peroneal Nerve Palsy caused by Compression of the Fabella A case report

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Because the peroneal nerve is present just beneath the skin especially near the lateral aspect of the knee joint, it is very susceptible to injury.Authors presented a case of peroneal nerve palsy maybe caused by compression of the fabella and reviewed the literatures reported untill last year.Case report:53 years old engeneer admitted in February 1975 with a diagnosis of lumbar disc lesion. He had complained of pain and numbness on the lateral aspect of the right leg and the dorsum of the foot. Since the symptomes increased from the full extension of his knee, he was forced to keep his knee flexed at 15-20 degrees.On the physical examination, (1) hypesthesia on the lateral aspect of the right leg and the dorsum of the foot, (2) weakness of extensor hallucis longus muscle, and (3) Tinel's sign over the peroneal nerve at the level of the lateral head of gastrocnemius were demonstrated. Plne X-p., laboratory data, lumbar myelogram and electromyogram were almost normal. On February 25, 1974, surgical exploration of the peroneal nerve was performed. It was compressed and stretched by the osseous mass (fabella) through the gastrocnemius in the full extension of the knee, but by the flexion its tension was decreased. The shape and size of removed fabella was normal and its articular surface was yellow and fibrillated.On next day of operation no pain was noted. Muscle weakness and hypesthesia disappeared within 3 weeks and 8 weeks after the operation.Untill last year 10 cases in Japan and only one case in U. S. A. had be reported. These cases reviewed with the authors case.
西日本整形・災害外科学会の論文

Peroneal Nerve Palsy caused by Compression of the Fabella A case report

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