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I.はじめに
中枢神経系におけるgangliocytomaは稀な腫瘍であり,本邦では0.2%の頻度である19).好発部位は第三脳室底が多いとされていたが10,23),最近は側頭葉が最多14,28)で,小脳,頭頂後頭葉,前頭葉,脊髄にも発生することが報告されている12-14).トルコ鞍内の発生は渉猟しえた範囲で31例の報告がある1-3,5-9,11,15-18,20-2224-26).
今回われわれはGH産生下垂体腺腫の疑いで手術を行った症例にintrasellargangliocytomaの合併を認めた極めて稀な1例を経験したので報告する.
The authors report a rare case of collision tumor composed of intrasellar gangliocytoma and pituitary adenoma. The patient was a 56-year-old woman, who had a mild acromegalic feature and slightly elevated plasma GH level. But she had no abnormal neurological findings. Transsphenoidal microsurgery was performed and an intrasellar tumor was totally removed. After the operation, plasma GH level decreased to within normal level. She was discharged with no neurological deficit. Histological examination showed two components. One of them was gangliocytoma composed of many large, and often binucleated cells with Nissl substance.
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