| Conductive | | Outer-ear causes | | Congenital microtia or atresia | | External otitis | | Trauma | | Squamous cell carcinoma | | Exostosis | | Osteoma | | Psoriasis | | Cerumen | | Middle-ear causes | | Congenital atresia or ossicular chain malformation | | Otitis media | | Cholesteatoma | | Otosclerosis | | Tympanic membrane perforation | | Temporal bone trauma | | Glomus tumors | | | Sensorineural | | Inner-ear causes | | Hereditary hearing loss | | Congenital viral infections | | Congenital malformations | | Presbycusis | | Meningitis | | Thyrotoxicosis | | Viral cochleitis | | Ototoxic drugs | | Otologic surgery | | Meniere disease | | Noise exposure | | Barotrauma | | Penetrating trauma | | Acoustic neuroma | | Meningioma | | Autoimmune disease | | Multiple sclerosis | | Cerebrovascular ischemia | | Arnold-Chiari malformation | | Otosyphilis | |
