Schwannomas are benign tumors, which arise from the Schwann cells of the central or peripheral nerves. They form 8% of all intracranial tumors and most of the cases arise from vestibular division of the 8 th cranial nerve. Rare cases are shown to arise from the olfactory or optic nerve, being devoid of myelin sheath. Up to date and according to our best of knowledge, 66 cases have been reported till now. Here we present a review of the literature and a case report of a 56-year-old male with an accidently discovered anterior cranial fossa schwannoma, following a road traffic accident. Tumor was completely excised, using a right frontal approach. Histopathology revealed Antoni-A cellular pattern. Although rare, but olfactory nerve schwannomas should be included in the differential diagnosis in anterior cranial fossa space occupying lesions, and the approach should be designed taking into consideration, this rare entity.

Objectives: Recent guidelines recommend early closure of the ruptured aneurysms. However, this may not be available in all cases especially in developing countries. This may lead to late surgery during the period of vasospasm which may carry a potential surgical risk. The aim of this study is to report our experience of microsurgical clipping during the period of vasospasm for ruptured anterior circulation aneurysms. Methods: This study included 36 patients with ruptured anterior circulation aneurysms treated with microsurgical clipping "between January 2014 and December 2016". All patients were operated during the period of vasospasm. We retrospectively reviewed our medical files for any operative complications, any evidence for clinical vasospasm and postoperative ischemia, and for the patients outcome. Results: Majority of patients were in good World Federation of Neurosurgeons (WFNS) Grades. Thirty (83.3%) were grades I-III. All the procedures completed successfully except in three patients who had an intraoperative rupture. Clinical vasospasm was reported in 8 (22.2%) of the patients. Favorable outcome was reported in 31 (86.1%) patients. We had only one (2.8%) perioperative mortality from aggravated vasospasm. Conclusions: Microsurgical clipping of the ruptured anterior circulation aneurysms can be done safely during the period of vasospasm without devastating complications. Securing the aneurysm in patients with late referral in developing countries should be done to prevent rebleeding and to allow for the 3H therapy application safely.

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