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KMID : 0361420140380030427
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Journal of Korean Academy of Rehabilitation Medicine
2014 Volume.38 No. 3 p.427 ~ p.432
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Acetabular Paralabral Cyst as a Rare Cause of Obturator Neuropathy: A Case Report
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Kim Sang-Hyun
Seok Hyun
Lee Seung-Yeol
Park Sung-Won
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Abstract
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An acetabular paralabral cyst is a benign soft tissue cyst usually seen in association with a tear of the acetabular labrum. Acetabular paralabral cysts are often the cause of joint pain, but they rarely cause compression of the adjacent neurovascular structures. We present a case of a 63-year-old male patient who had paresis and atrophy of right hip adductor muscles. Right obturator neuropathy was confirmed through an electrodiagnostic study. In addition, magnetic resonance imaging showed a paralabral cyst in the right acetabulum which extended to the pelvic wall. The patient underwent conservative treatment without surgical procedure. The pain was decreased after 1 month of conservative therapy. The pain was decreased at the 1-month follow-up. Follow-up electromyography showed polyphasic motor unit potentials in adductor magnus and adductor longus muscles. Based on the experience of this case, an acetabular paralabral cyst should be considered as one of the rare causes of obturator neuropathy.
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KEYWORD
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Acetabulum, Synovial cyst, Obturator nerve
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