Long-Term Follow-Up and Clinico-Histopathological Features of Simpson Grade 1 Surgical Resection of Large Olfactory Groove Meningioma

Abstract

Olfactory groove meningiomas can attain substantial size before producing enough symptoms alerting the pa- tient or physician to the possibility of a tumor. The surgical goal is gross total resection in order to reduce the chances of recurrence, however, increased surgical complication rates can be seen with more aggressive resections. The optimal im- aging follow-up time following gross total resection of olfactory groove meningiomas is not known. We report a young woman presenting with a three year history of frontal lobe dysfunction, anosmia and bitemporal visual field loss harboring a massive olfactory groove meningioma. She underwent gross total resection of a tumor with unusual neuropathological features potentially worrisome for aggressive behavior. Ten year follow-up with annual imaging has demonstrated no evi- dence of recurrence. The current literature on olfactory groove meningiomas following Simpson grade 1 resection regard- ing the various surgical approaches, complication and recurrence rates is reviewed. Unique features of this case suggest that ongoing surveillance may be necessary.