Benign Vestibular Schwannoma: a Rare Cause of Nonaneurysmal Subarachnoid Hemorrhage

Subarachnoid Hemorrhage (SAH) is most commonly caused by trauma, aneurysms, other vascular lesions, and infrequently malignant tumors such as gliomas or metastasis; however, benign intracranial tumors such as meningiomas or schwannomas are an uncommon cause. Vestibular schwannomas, accounting for approximately 8% of all intracranial tumors and 80% of Cerebellopontine Angle (CPA) neoplasms are typified by slow growth and slowly progressive symptomatic presentation such as unilateral hearing loss, or imbalance. Acute presentation of vestibular schawannoma is extremely uncommon and may be associated with Intratumoral Hemorrhage (ITH) or SAH. Here we present a case of a previously asymptomatic gentleman presenting in a manner consistent with SAH, ultimately caused by a benign vestibular schwannoma.