Microsurgical Removal of Olfactory Groove Meningiomas via the Unilateral Subfrontal Approach
Abstract: Objective: To investigate the techniques and clinical effects for removal of olfactory groove meningiomas (OGMs) via unilateral subfrontal approach. Methods: Between January 2004 and May 2015, a total of 45 OGM patients were operated on via the unilateral subfrontal approach. There were 11 male patients and 34 female patients. Their mean age was 49.2 (22~78) years. The average maximal tumor diameter was 4.9 cm (2.2 cm - 8.1 cm)). The clinical data, radiological findings, surgical records and outcome of patients were retrospectively analyzed, and the prognostic factors were analyzed by using of the unpaired χ2 test with continuity correction. Results: Apparent complete tumor removal was achieved in 41 patients (91.1%). Four patients (8.9%) had minimal residual tumors, 3 of which had gamma knife radiosurgery. There was no surgical mortality. The main operative complications included new anosmia (9 cases), intracranial infection (3 cases), frontal contusion (5 cases), frontal mental changes (3 cases), cerebrospinal fluid leakage (2 cases), and visual deficits\brain swelling\seizures and hydrocephalus (1 case) respectively. At 3 - 6 months after discharge, 38 (84.4%) patients had a good recovery, 6 (13.3%) were moderately disabled and 1 (2.2%) was severely disabled. The preoperative KPS ≤ 70 was the cause of unfavorable prognosis (χ2 = 5.139, P = 0.023). During the mean follow-up of 42.6 months (range, 3 - 107 months) for 41 patients, the average KPS was 85.2. Tumor recurred in 3 cases, all being treated with gamma knife radiosurgery, one of which required reoperation. Conclusion: By using optimal operative techniques, OGMs can be removed safely via the unilateral subfrontal approach with relatively low morbidity. The preoperative KPS ≤ 70 is an unfavorable prognostic factor for OGM resection.
文章引用: 谭源福 , 肖绍文 , 张超元 , 吴雪松 , 周 全 , 廖兴胜 , 罗 昱 , 余 良 , 陈志毅 (2016) 单侧额下入路显微切除嗅沟脑膜瘤。 外科， 5， 1-11. doi: 10.12677/HJS.2016.51001
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