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I.はじめに
脈絡叢乳頸腫は,原発性脳腫瘍のO.4—O.6%11)の頻度を占める比較的まれな腫瘍である.側脳室,第4脳室に好発10),第3脳室における発生頻度は,10-15%3)である.また1歳未満の小児に多く,2歳以内では60.2%9)を占めるという.本邦において報告された第3脳室脈絡叢乳頭腫7例1,6,7,8,14)中,1歳以下5例,2歳8カ月が1例,12歳が1例である.今回われわれは,19歳の男性で無症状で発見され,腫瘍摘出術を施行し良好な経過を得た第3脳室脈絡叢乳頭腫の1例を経験したので,若干の文献的考察を加えて報告する,
A rare case of choroid plexus papilloma in the third ventricle is presented.
A 19 year old male patient was admitted to our hospit-al for further examination of a head injury. On admis-sion, he was asymptomatic. CT and MRI showed a homogeneous mass extending from the third ventricle to the right lateral ventricle.
The right lateral ventricle was slightly enlarged. Cra-niograms showed calcification above the sella turcica.Cerebral angiograms disclosed a tumor stain fed by the right medial posterior choroidal artery in the third ven-tricle. Anterior transcallosal approach was chosen for the extirpation of the tumor. Histological study revealed choroid plexus papilloma. The postoperative course was uneventful.
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