@article{oai:hirosaki.repo.nii.ac.jp:00006750,
 author = {柾谷, 遥香 and 山本, 達也 and 浅利, 有紗 and 伊東, 竜也 and 片山, 耕輔 and 八木, 弘子 and 照井, 君典},
 issue = {1-4},
 journal = {弘前医学},
 month = {Mar},
 note = {くも膜嚢胞は一般的には無症候性であり，画像検査で偶発的に発見されることが多いが，稀に閉塞性水頭症，内分泌障害，視機能障害などを引き起こすことが報告されている．今回，くも膜嚢胞による閉塞性水頭症をきたし，第三脳室底開窓術が著効した一例を経験した．症例は3 歳の男児．嘔吐，歩行障害，眼位異常を主訴とし，当科を紹介され受診した．頭部MRI で水頭症と中脳水道付近の嚢胞性腫瘤を認め，嚢胞切除術及び第三脳室底開窓術を施行した．術後，症状は徐々に軽快し，画像検査上，水頭症所見も改善傾向を認めた．術中所見と病理検査の結果より，嚢胞性腫瘤は第三脳室由来のくも膜嚢胞であると診断され，閉塞性水頭症をきたしたと考えられた．くも膜嚢胞の多くは無症候性であるが，画像検査で偶発的に発見された場合，低年齢であるほど，自然増大して閉塞性水頭症を引き起こす可能性があり，より注意してフォローアップする必要がある．
　Although arachnoid cysts are generally asymptomatic and are often detected incidentally by imaging studies, theyhave been reported to cause obstructive hydrocephalus, endocrine disorders, and visual dysfunction in rare cases. Inthis study, we report a case of obstructive hydrocephalus caused by an arachnoid cyst, which responded well toendoscopic third ventriculostomy. The patient was a 3-year-old boy who was referred to our department with thechief complaint of vomiting, gait disturbance, and abnormal eye position. An MRI scan showed hydrocephalus and acystic mass close to the cerebral aqueduct. Cystectomy and endoscopic third ventriculostomy were performed. Afterthe surgery, the symptoms gradually improved, and the hydrocephalus tended to improve on imaging examinations.Based on the intraoperative findings and the results of the pathological examination, the cystic mass was diagnosedas an arachnoid cyst originating from the third ventricle, and it was considered that the arachnoid cyst caused theobstructive hydrocephalus. Most arachnoid cysts are asymptomatic; however, if they are found incidentally onimaging studies, the younger the patient, the more likely they are to spontaneously enlarge and cause obstructivehydrocephalus. Thus, arachnoid cysts in children should be followed up carefully.},
 pages = {76--79},
 title = {第三脳室底開窓術が著効した，くも膜嚢胞による閉塞性水頭症の一例},
 volume = {72},
 year = {2022}
}