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KMID : 0942820100090020061
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Journal of Korean Brain Tumor Society
2010 Volume.9 No. 2 p.61 ~ p.66
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Surgical Results of Olfactory Groove Meningioma：Comparison of Bifrontal and Fronto-Pterional Approaches
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Cho Sung-Jin
Lee Jung-H.
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Abstract
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Objective: To compare the clinical outcome and recurrence rate following bifrontal and fronto-pterional approaches for resection of olfactory groove meningiomas(OGMs).
Methods: The study included 43 consecutive patients who underwent surgery for OGM by a senior author between June 1995 and January 2008. Of those, 13(30.2%) were men and 30(69.8%) were women, and the mean age of all patients was 58.5 years(range, 16-89). Surgery was performed using bifrontal(BF, n=25) or fronto-pterional(FP, n=18) approaches. The patients’ surgical records, discharge letters, follow-up records, and imaging data were analyzed retrospectively.
Results: Simpson grade I-II resection was achieved in 91.7% of the BF group and 100% of the FP group. Radiological recurrence was observed in three(12%) patients in the BF group, and no recurrence was observed in the FP group. The overall recurrence rate was 7.0%；however, no case required recurrent surgery. The mean follow-up time was 32.8 months(range, 4.7-14.5). The mean surgery duration was 327 min in the BF group and 284 min in the FP group. Surgeryrelated complications were observed in 28% of the BF group and in 16.7% of the FP group. The mean tumor size was 53 mm in the BF group and 51 mm in the FP group.
Conclusion: No difference in clinical outcome was found between the BF and FP approaches. Simpson grade I-II resection was achieved in large tumors and in those with ethmoid air sinus invasions using the FP approach. We have used the FP approach in recent years because it provides a familiar operative view and preserves the vital neurovascular structures surrounding the tumor.
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KEYWORD
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Meningioma, Olfactory groove, Recurrence, Outcome
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