颅内三叉神经鞘瘤的CT及MRI诊断

CT and MRI diagnosis of intracranial trigeminal neurinoma

目的分析颅内三叉神经鞘瘤的CT和MRI表现。方法搜集36例经手术和病理证实的颅内三叉神经鞘瘤的CT和MRI资料,探讨颅内三叉神经鞘瘤分型、诊断要点及有关鉴别诊断。结果颅内三叉神经鞘瘤分三型:颅后窝型(8例)、颅中窝型(4例)及骑跨型(24例)。病灶信号混杂,易囊变(12例),增强后可见不均匀强化;CT能看到岩尖骨质吸收或破坏(17例)。结论CT和MRI的联合应用对三叉神经鞘瘤的定位、定性诊断具有较高的准确性,对临床治疗及手术方式的选择具有指导作用。

Objective To analyze CT and MRI manifestations of intracranial trigeminal neurinoma. Methods Radiological data of 36 cases with surgically and pathologically proved intracranial trigeminal neurinoma were studied retrospectively. The CT and MRI manifestations, radiological grouping, diagnosis, and differential diagnosis were included. Results The trigeminal neurinoma could be classified into three types： posterior cranial fossa type （8 cases）, middle cranial fossa type （4 cases）, and straddle type （24 cases）. Miscellaneous signals, cystic degeneration （12 cases） and uneven enhancement were the major radiological characteristics. Bone absorption or destruction of petrous apex （17 cases） could be found in CT film. Conclusion The combined application of CT and MRI may advance the diagnosis and guide the clinical management of intracranlal trigeminal neurinoma.