Microsurgical Excision of Olfactory Groove Meningeomas, Comparative Studies of Different Surgical Approaches

Abstract

To review the surgical approaches, techniques, outcomes, and recurrence rates in a series of 6 olfactory groove meningioma (OGM) patients operated from January 2010 to April 2011.Methods: Six patients underwent craniotomy and micro-neurosurgical removal of olfactory groove meningioma maximum. Tumor diameter varied from 5 to 8.5 cm among six cases, 2 cases underwent glabellar mini craniotomy another 2 by bifrontal approach and rest of them were by frontolateral approach. Result: Total removal was possible in all cases. Histopathology revealed typical meningioma (WHO grade 1). there was no operative mortality and no permanent focal neurological deficit except anosmia. One patient developed leak and two cases meningitis which was resolved by lumber drain and antibiotic therapy. No tumor recurrence within six months of followup. For the removal of large olfactory groove meningiomas we used three different surgical approaches: frontolateral approaches, bifrontal approach and glabellar mini craniotomy. We consider the frontolateral approach is an alternative, if not superior, to standard bifrontal approaches. DOI: http://dx.doi.org/10.3329/medtoday.v24i1.13942 Medicine TODAY Vol.24(1) 2012 pp.5-7