An Uncommon Lesion of the Otic Capsule

A man in his 40s presented with a gradual-onset, left-sided hearing loss with a whistling tinnitus and occasional sharp otalgia; examination showed a smooth mass behind the left tympanic membrane. What is your diagnosis?

from #ORL via xlomafota13 on Inoreader http://ift.tt/1VR8V1F
via IFTTT