The interhemispheric and the bilateral olfactory cisternae are opened in order to drain the CSF and to avoid further retraction. Both olfactory nerves should be dissected symmetrically without coagulation under small bleedings. Surgicel® is enough to stop the small bleedings mainly near the crivous plate of the ethmoidal bone. After that, the surgical overview could better show the image of both olfactory nerves and both optic nerves composing a groove enlarged by the tumor. The pseudocapsula of the tumor can be seen through this groove, and the dissection between the carotid artery and the pseudocapsula should be performed on both sides. Following this step, a debulking of the tumor should be done, and a piecemeal resection is recommended. The ultrasonic aspirator may be used with extreme caution. The retraction of bilateral frontal poles should never be strong enough to hurt the pia mater and cause damage to the brain parenchyma [1, 2].