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Journal of the Korean Academy of Rehabilitation Medicine 1997;21(5):1030-1034.
Peroneal Nerve Entrapment Caused by an Atypical Popliteal Cyst in a Child: A case report.
Park, Jae Heung , Cha, Young Hoon , Park, Byung Kyu , Yoo, Chong Ill
1Department of Rehabilitation Medicine, Pusan National University Hospital, Korea.
2Department of Orthopedic Surgery, Pusan National University Hospital, Korea.
소아에서 발생한 비정형적 슬와낭종에 의한 비골신경 압박병증 ⁣증례보고⁣
박재흥, 차영훈, 박병규, 유총일*
부산대학교병원 재활의학과 및 정형외과

Baker's cyst is commonly associated with intraarticular pathology such as degenerative arthritis. Few cases of neural compression by a Baker's cyst in the popliteal fossa have been reported with intraarticular pathology. We report a case of peroneal nerve compression by an atypical Baker's cyst in a child without intraarticular pathology. A 10-year-old boy had 6-month history of the left foot drop without a known trauma. There was no swelling or pain in the knee. The electrodiagnostic study demonstrated a profound lesion of the deep peroneal nerve and a mild denervation of the superfical peroneal nerve. Magnetic resonance images displayed an atypical Baker's cyst originating from the popliteal fossa and extending to the posterolateral side of the fibular head. Clinical and electrophysiological findings improved after aspiration of the cyst.

Key Words: Baker's cyst, Peroneal nerve entrapment


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