中頭蓋窩くも膜嚢腫と慢性硬膜下血腫の合併—3例の報告と文献例

Association of Subdural Hematoma and Middle Fossa Arachnoid Cyst: Report of three cases and a review

I．はじめに

　頭蓋内くも膜嚢腫は，CTの出現以来診断が容易となり，報告例も増加している．くも膜嚢腫，特に中頭蓋窩のそれが硬膜下血腫を合併することがあることは古くから知られているが，このような合併例の報告は実際にはそれほど多くない．本論文では硬膜下血腫を合併した中頭蓋窩くも膜嚢腫3例を報告するとともに，現在までの報告例のうちCTまたは手術により確認され，かつ十分な記載がある21例を加えて，臨床的特徴につき考察する．

Three cases of arachnoid cyst of the middle fossa associated with subdural hematoma were briefly re-ported. In all three cases diagnosis was confirmed by CT scan and operation.

A review of the literature found reports of 21 similar cases with adequate descriptions of clinical and radiolo-gical data for analysis. Of a total of 24 such cases in-cluding our 3 patients (Group B in Table 2) , 21 were male and only 3 were female. The arachnoid cyst was found on the left side in 18, on the right side in 5 and bilaterally in the remaining one. Thirteen patients were in age 11 through 20.