Chronic Suppurative Otitis Media

Chronic suppurative otitis media (CSOM) is defined as a perforated tympanic membrane with persistent drainage from the middle ear for more than 2-6 weeks. [123Chronic suppuration can occur with or without cholesteatoma, and the clinical history of both conditions can be very similar. CSOM differs from chronic serous otitis media in that chronic serous otitis media may be defined as a middle ear effusion without perforation that is reported to persist for more than 1-3 months. 

CSOM is a disease process that has affected humans since prehistoric times. McKenzie and Brothwell demonstrated evidence of chronic suppurative otitis in a skull found in Norfolk, United Kingdom, which is thought to be from the Anglo-Saxon period

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