CT和MRI检查在视神经鞘脑膜瘤诊断中的价值

目的探讨CT和MRI检查在诊断视神经鞘脑膜瘤中的价值。方法本研究15例视神经鞘脑膜瘤均经手术及病理检查确诊,并均于术前行CT和MRI检查。结果15例视神经鞘脑膜瘤患者中,增强CT仅显示2例颅内蔓延;平扫MRI显示2例颅内蔓延;而增强MRI显示9例颅内有肿瘤。结论增强MRI在诊断视神经鞘脑膜瘤颅内蔓延中非常有价值,可显示增强CT和MRI平扫未显示的病变,应将其作为视神经鞘脑膜瘤术前、术后常规检查。

The value and importance of CT and MRI for diagnosing optic nerve sheath meningiomas

Objective To study the val ue and importance of CT and MRI for diagnosing optic nerve sheath meningiomas. Methods Fifteen patients with optic nerve sheath meningiomas were analyzed with CT and MRI and were confirmed by operation and pathological examination. Results The CT image was enhanced in 2 cases of intracranial extension of the optic nerve sheath meningiomas; for the examination of MRI without Gd-DTPA shown the lesion was extended in 2 cases and the positive result of MRI with Gd-DTPA was consistent with the diagnosis of the brain tumor in 9 cases. Conclusion MRI with Gd-DTPA has been proved to be valuable in detecting intracranial extension of optic nerve sheath meningiomas that are not well visualized on enhanced CT and standard MRI, and should be used as a routinely examination of optic nerve sheath meningiomas before and after orbital surgery.(Chin J Ophthalmol,2004,40:30-33)