Outcome of extradural devascularization in resection of giant olfactory groove meningioma in bilateral subfrontal approach

Abstract Background Olfactory groove meningioma (OGM) is characterized by slow-growing tumors that are frequently bilateral as opposed to unilateral & asymmetrical and may cause progressive frontal lobe compression. We aimed evaluate the value of extradural devascularization a golden step in subfrontal approach management OGM. Results The mean operative time was 158.32 ± 24.88. Blood loss ranged from 500 1000 cc with 763.64 155.98. number patients requiring blood transfusion 5 (22.7%). Based on Simpson classification, 19 (86.4%) had whole tumor excision (grade I, II) 3 (13.6%) grade III IV. incidence complications among studied is: CSF leak did not occur any case, pneumocephalus occurred 1 (4.5%) patient, anosmia focal CNS deficit wound infection patient hematoma patient. Only case died due pulmonary embolism, whereas behavioral manifestations 9.09% patients. Conclusions this OGM associated lower intraoperatively (total 500–1000 mL, recurrence rate, mortality additional neurological deficits postoperatively.