Clinical presentations Hearing loss and tinnitus Progressive HL 90% SDS reduction 10% of patients complain of sudden HL Unbalance Otalgia and compression due to depression of sensor fiber of facial nerve Involvement of trigeminal nerve Compression of cerebellum and brainstem ataxia, nystagmus and intracranial hypo- pressureClinical presentations ◼ Hearing loss and tinnitus ◼ Progressive HL 90% ◼ SDS reduction ◼ 10% of patients complain of sudden HL. ◼ Unbalance ◼ Otalgia and compression due to depression of sensor fiber of facial nerve ◼ Involvement of trigeminal nerve ◼ Compression of cerebellum and brainstem: ataxia, nystagmus and intracranial hypo￾pressure