Pathology of chronic otitis media.

Area of Science:

• Otolaryngology
• Pathology
• Histopathology

Background:

• Otitis media is a common middle ear infection.
• Chronic otitis media (COM) can lead to serious complications.
• Histopathological analysis of temporal bones provides insight into COM pathology.

Purpose of the Study:

• To determine the prevalence of different types of otitis media in autopsy temporal bones.
• To investigate the histopathological features of chronic otitis media.
• To compare the association of granulation tissue and cholesteatoma with COM complications.

Main Methods:

• Retrospective review of 800 pathological temporal bones from autopsy cases.
• Histopathological examination of 123 temporal bones diagnosed with chronic otitis media.
• Analysis of associated findings including granulation tissue, cholesteatoma, and complications.

Main Results:

• Otitis media was present in 41.6% of temporal bones.
• Chronic otitis media was found in 36.9% of cases, often without tympanic membrane perforation.
• Granulation tissue was more prevalent than cholesteatoma in COM and associated with more complications.

Conclusions:

• Chronic otitis media is histopathologically frequent, even without tympanic membrane perforation.
• Granulation tissue is a more common finding than cholesteatoma in chronic otitis media.
• Complications of otitis media are more frequently secondary to granulation tissue than cholesteatoma.