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Size of the mastoid air cells and otitis media
The Annals of Otology, Rhinology, and Laryngology
|July 1, 1985
Summary
Secretory otitis media in children is linked to smaller mastoid air cell systems. This study suggests that hypocellularity is a consequence, not a cause, of the condition.
Area of Science:
- Pediatric Otolaryngology
- Radiology
- Epidemiology
Background:
- Secretory otitis media (SOM) is a common childhood condition.
- The relationship between mastoid pneumatization and SOM is not fully understood.
- Previous research suggests potential links between middle ear disease and mastoid development.
Purpose of the Study:
- To investigate the correlation between mastoid air cell system size and the incidence/duration of secretory otitis media in children.
- To explore potential gender differences in mastoid pneumatization.
- To determine if mastoid cell system size is associated with eardrum changes or history of acute otitis.
Main Methods:
- Prospective study involving 79 healthy children aged 2-7 years.
- Nine tympanometric screenings, including otomicroscopy in three.
- Radiographs of mastoid processes using Runstrøm's lateral projection at age 7.
Main Results:
- Median mastoid cell system size was 8.25 cm².
- Significantly larger cell systems in girls (9 cm²) compared to boys (7.5 cm²).
- A significant inverse correlation between cell system size and duration of SOM; smaller systems in children with longer SOM episodes.
Conclusions:
- Hypocellularity of the mastoid air cell system appears to be a sequela (consequence) of secretory otitis media, not a predisposing cause.
- Mastoid cell system size is associated with the chronicity of SOM and presence of eardrum changes.
- Gender influences mastoid pneumatization, with girls exhibiting larger systems.