Mansoura University Hospital, Mansoura-Dakhlia, Egypt.
Neurosurg Focus. 2011 May;30(5):E12. doi: 10.3171/2011.2.FOCUS1118.
OBJECT: Juxtasellar meningiomas frequently extend into the optic canal. Removing these meningiomas from the optic canal is crucial for favorable visual outcome. METHODS: The authors performed a retrospective analysis of 45 patients with anterior and middle fossa meningiomas with involvement of the optic pathway in whom surgery was performed by the senior author (O.A.M.) during the period from 1993 to 2007. Extent of resection and recurrence rates were determined by pre- and postoperative MR imaging studies. Visual outcomes were evaluated with full ophthalmological examinations performed before and after surgery. RESULTS: Forty-five patients (31 women and 14 men) were involved in this study; their mean age was 51.6 years. Patients were followed for a mean of 29.8 months (range 6-108 months). No surgery-related death occurred. The average tumor size was 3.1 cm. Total resection of the tumor (Simpson Grade I) was achieved in 32 patients (71.1%). Gross-total resection (Simpson Grades II and III) was achieved in 13 patients (28.9%). Only 1 patient harboring a left cavernous sinus meningioma had tumor recurrence and underwent repeat resection. Meningiomas extended into 58 optic canals in these cases; 13 patients showed extension into both optic canals. Visual disturbance was the main presenting symptom in 37 patients (82.2%); 8 patients had normal vision initially. Visual improvement after surgery was seen in 21 (57%) of 37 patients and in 27 (34.6%) of 78 affected eyes. Vision remained unchanged in 48 (61.5%) of 78 eyes. Transient postoperative visual deterioration occurred in 2 eyes (2.6%), with recovery to baseline over time. Only 1 (1.3%) of 78 eyes had permanent visual deterioration after surgery. The visual outcome was affected mainly by the tumor size, the preoperative visual status, and the duration of symptoms. CONCLUSIONS: Involvement of the optic canal in meningiomas is frequent. It occurs in a wide variety of anterior skull base meningiomas and it can be bilateral. It is a prominent factor that affects the preoperative visual status and postoperative recovery. Decompression of the optic canal and removal of the tumor inside is a crucial step in the surgical management of these tumors to optimize visual recovery and prevent tumor recurrence.
目的:鞍旁脑膜瘤常常延伸至视神经管。从视神经管中切除这些脑膜瘤对获得良好的视力结果至关重要。
方法:作者对 1993 年至 2007 年间由资深作者(O.A.M.)进行手术的 45 例涉及视神经通路的前颅窝和中颅窝脑膜瘤患者进行了回顾性分析。通过术前和术后磁共振成像研究确定切除范围和复发率。通过术前和术后的全面眼科检查评估视力结果。
结果:本研究共涉及 45 例患者(31 名女性和 14 名男性),平均年龄为 51.6 岁。患者平均随访 29.8 个月(6-108 个月)。无手术相关死亡。肿瘤平均大小为 3.1cm。32 例患者(71.1%)实现肿瘤全切除(Simpson 分级 I)。13 例患者(28.9%)实现大体全切除(Simpson 分级 II 和 III)。仅有 1 例左侧海绵窦脑膜瘤患者肿瘤复发并再次接受了切除。这些病例中,脑膜瘤延伸至 58 个视神经管,13 例患者视神经管双侧受累。37 例患者(82.2%)以视力障碍为主要表现症状,8 例患者初始视力正常。术后视力改善见于 37 例患者中的 21 例(57%)和 78 只受累眼中的 27 只(34.6%)。78 只眼中 48 只(61.5%)视力保持不变。术后 2 只眼(2.6%)出现短暂性术后视力恶化,随时间推移恢复至基线。术后仅有 1 只眼(1.3%)视力永久恶化。视力结果主要受肿瘤大小、术前视力状况和症状持续时间影响。
结论:视神经管受累在脑膜瘤中很常见。它发生于广泛的前颅底脑膜瘤中,且可以是双侧的。它是影响术前视力状况和术后恢复的重要因素。视神经管减压和切除管内肿瘤是这些肿瘤手术治疗的关键步骤,可优化视力恢复并防止肿瘤复发。
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