Parasagittal meningioma is a tumor that occupies the angle between thedura and the sinus, usually benign tumor but may be malignant. It has tobe totally removed for complete cure but complete resection is sometimesdifficult because of sinus invasion. Attempts for total removal in sinusinvasion may lead to post-operative complications the most common isvenous infarction which may be fatal. Attempts of sinus repair orreconstruction is also hazardous. Gamma knife radiosurgery is now thebest option to handle a tumor residual within the sinus. The possibility oftotal removal is best withe anterior third tumors least with posterior thirdones. Better results are obtained in tumors just attached to the wall of thesinus and decreases with sinus invasion.