Beutler A S, Hsiang J K, Moorhouse D F, Hansen L A, Alksne J F
Institute of Neurological Surgery and Neuropathology, University Hospital, Zurich, Switzerland.
Neurosurgery. 1995 Jul;37(1):125-8. doi: 10.1227/00006123-199507000-00019.
Glial tumors in the cerebellopontine angle (CPA) are rare. Four histologically distinct types of glial tumors of the CPA have been described in the literature as ependymoma, medulloblastoma, mixed glial tumor, and fibrillary astrocytoma. This case report describes a pilocytic astrocytoma of the CPA. A 58-year-old man with a hearing loss had an extra-axial tumor in the left CPA that extended into the internal auditory canal. The characteristics of the tumor on magnetic resonance imaging scans differed from those of typical CPA tumors. It adhered avidly to the cochlear and vestibular nerves, which had to be sacrificed for gross total resection. Microscopic examination showed the typical features of an adult-type pilocytic astrocytoma.
小脑脑桥角（CPA）的胶质肿瘤较为罕见。文献中已描述了四种组织学上不同类型的CPA胶质肿瘤，分别为室管膜瘤、髓母细胞瘤、混合性胶质肿瘤和纤维性星形细胞瘤。本病例报告描述了一例CPA的毛细胞型星形细胞瘤。一名58岁听力丧失的男性在左侧CPA有一个轴外肿瘤，该肿瘤延伸至内耳道。磁共振成像扫描显示该肿瘤的特征与典型的CPA肿瘤不同。它紧密附着于耳蜗和前庭神经，为实现全切除不得不牺牲这些神经。显微镜检查显示为成人型毛细胞型星形细胞瘤的典型特征。
