顱內三叉神經瘤電腦斷層影像之評估

本文報告9例顱內三叉神經瘤，其中4例發生在中顱窩，2例位於後顱窩，3例為鞍狀型(saddle tumor)。所有病例皆經手術及病理證實。其中男性3例，女性6例，年齡為15-65歲。9例都有電腦斷層攝影檢查，其發現為：(1)注射對比劑前有8例，其中7例為略不均勻高密度，1例均勻低密度（與周圍腦組織比較）。注射對比劑後有9例，除1例低密度腫瘤無影像增強現象外，餘8例都有影像增強現象，其中6例為不均勻增強，2例為均勻增強。(2)腫瘤之界限皆明顯，6例腫瘤邊緣皆規則，3例腫瘤邊緣不規則。(3)4例在中顱窩的腫瘤中，其中2例側腦室前角有被壓迫變形。2例在後顱窩的腫瘤中，有1例第4腦室被壓迫變形，3例鞍狀型均有推移第4腦室的現象，其中1例並有側腦室顯角推移現象。(4)9例中7例皆有鄰近骨骼的侵蝕現象。

關鍵字

電腦斷層攝影；大腦，腫瘤；三叉神經瘤

並列摘要

We reported 9 cases of intracranial trigeminal neuroma. Their locations were: four i the middle cranial fossa, two in the posterior cranial fossa, three saddle appearance both in the middle and posterior cranial fossas. All these cases underwent surgical resection and were proved histologically. Three of them were male. Their ages ranged from 15 to 65 years. Nine cases had CT studies. Their CT findings were: (1) Eight cases had pre-cotrast Ct. Sven had slightly inhomogeneous high density, one had homogeneous low density. Nine cases had post-contrast Ct. Eight showed evidence of contrast enhancement. Six of them had in-homogeneous enhancement. Two had homogeneous enhancement. (2) All these tumors were well-circumscribed, six cases had regular margin, three had irregular margin. (3) three cases of saddle type had displacement of the fourth ventricle. One of them had displacement of the temporal horn o the lateral ventricle. four tumors located in the middle cranial fossa, two of them showed compression and deformity of the anterior horn of the lateral ventrical. (4) The majority (seven cases) had bony erosion of adjacent bony structures.

並列關鍵字

computed tomography ； brain, neoplasm ； trigeminal neuroma

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顱內三叉神經瘤電腦斷層影像之評估

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