This uncommon tumor accounts for less than 2% of all<unk>  tumors. While patients present with symptoms related to the<unk> <unk>  cavity location of the tumor, the tumor may expand into the adjacent structures (external auditory canal, mastoid bone, and eustachian tube). Patients come to clinical attention with unilateral (one sided) hearing loss, usually associated with decreased auditory acuity, and particularly conductive hearing loss if the ossicular bone chain<unk> <unk>  bones) is involved. Tinnitus (ringing), otitis media, pressure or occasionally<unk>  discharge are seen. At the time of otoscopic exam, the tympanic membrane is usually intact, with a fluid level or mass noted behind the<unk>  drum. Even though this is a<unk> " type tumor, there is almost never evidence of<unk>  function clinically or by laboratory examination.
Neuroendocrine adenoma middle ear
Vestibular adenitis
Labyrinthine fistula
Autoimmune inner ear disease
Nasal septal abscess
Surfer's ear
Rectovestibular fistula
Transient lingual papillitis