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症例は69歳の女性である.右大腿に疼痛が出現し,右下肢筋力低下を来した.MRIで右股関節前方にT1強調で低信号,T2強調で高信号の内部均一な腫瘤を認め,これが大腿神経を圧迫していると考え,摘出術を行った.術後,右大腿の痛みと筋力低下は軽快し,病理検査でガングリオンと診断された.股関節ガングリオンは非常に稀であり,さらに大腿神経麻痺を合併していた.股関節ガングリオンの治療は経過観察,穿刺吸引,摘出術があるが,本症例のように筋力低下を来す場合,摘出術による根治的治療が有用であると考える.
We report the case of a 69-year-old woman with right leg pain and muscle weakness in whom MRI revealed a mass in the right inguinal region that was low intensity on T1WI and high intensity on T2WI. It was concluded that the femoral nerve was compressed by the mass, and it was surgically removed. The right leg pain and muscle weakness improved postoperatively, and the mass was diagnosed as a ganglion by pathological examination. A ganglion of the hip causing femoral nerve palsy is rare. The usual management of ganglions is observation, aspiration, or operation, but femoral ganglions that cause femoral nerve palsy must be treated surgically.
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