Conductive Hearing Loss - Differential Diagnosis Algorithm



Normal Otoscopy - Middle Ear:

 • Otosclerosis

 • Congenital (Ossicular Chain Malformation)

 • Eustachian Tube Dysfunction

Abnormal Otoscopy - External Ear:

 • Cerumen

 • Foreign Body

 • Otitis Externa

 • Inflammation

 • Congenital (Atresia)

 • Trauma 

 • Benign Mass (Polyp, Osteoma, Exostosis)

 • Tumors (SCC)

 • Dermatologic

Middle Ear:

 • Otitis Media

 • Tympanic Membrane Perforation

 • Cholesteatoma

 • Trauma (barotrauma)

 • Tumors (Glomus, Adenoma)

 • Eustachian Tube Dysfunction



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