A Rare Case Report of Arachnoid Cyst of the Posterior Fossa Presenting With Unilateral Sensorineural Hearing Loss

Arachnoid cyst are rare intracranial tumors accounting for 1% of all brain lesions. Symptomatic arachnoid cyst of CP angle are even a rarer occurrence.CPA arachnoid cyst have a female preponderance and are progressive [1]. Arachnoid cysts of the posterior fossa may produce vague symptoms typical of a tumor, such as headache, dizziness, tinnitus, progressive sensorineural hearing loss, and neurovascular deficits. Management of these lesions is controversial; if the arachnoid cyst is symptomatic, surgical treatment is known to alleviate symptoms in 95% of the patients. The recurrence rate is approximately 10%, which warrantes regular follow-up in post-operative cases. Here, we report a case of a 19- year-old female presenting with right-sided hearing loss due to right cerebellomedullary cistern arachnoid cyst.