Sudden Sensorineural<unk>  (SSHL)
Infections: (Meningitis, Viral cochleitis)
Barotrauma
Penetrating trauma
Meniere Disease
Autoimmune disease
Multiple Sclerosis
Cerebrovascular ischemia
Tumors (Acoustic neuroma, Meningioma)
Hereditary<unk> 
Congenital viral infections
Congenital malformations
Presbycusis
Thyrotoxicosis
Ototoxic drugs: Aminoglycosides, Erythromycin, Tetracycline, chemotherapeutic agents, high-dose aspirin, phosphodiesterase-5 inhibitors (e.g. sildenafil, antimalarial drugs, Cocaine, Heavy Metals
Otologic surgery
Noise exposure
Outer Ear
Trauma
Squamous cell carcinoma
Congenital microtia or atresia
Otitis Externa
Exostosis
Osteoma
Psoriasis
Cerumen impaction
Middle ear
Glomus tumors
Tympanic membrane rupture
Temporal bone trauma
Congenital atresia or Ossicular chain malformation
Eustachian tube dysfunction
Chronic Otitis media
Cholesteatoma
Otosclerosis
Trauma
Squamous cell carcinoma
Congenital microtia or atresia
Otitis Externa
Exostosis
Osteoma
Psoriasis
Cerumen impaction
Glomus tumors
Tympanic membrane rupture
Temporal bone trauma
Congenital atresia or Ossicular chain malformation
Eustachian tube dysfunction
Chronic Otitis media
Cholesteatoma
Otosclerosis
Hearing loss
Sudden Sensorineural Hearing Loss 
Hydrocephalus
Infections: 
Failure to thrive 
Barotrauma
Failure to thrive
Penetrating trauma