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Published on: February 29, 2020
Pars flaccida retraction and mastoid size: relationship in clinically normal specimens
1Temporal Bone Laboratory, Emory University, Atlanta, Georgia 30322, USA. ntodd@emory.edu
The Journal of Laryngology and Otology
|February 27, 2007
Summary
Pars flaccida retraction in normal ears is not linked to mastoid size or epitympanic aeration. This ear condition may stem from temporary non-aeration of Prussak
Area of Science:
- Otolaryngology
- Anatomy
- Radiology
Background:
- The link between pars flaccida retraction, epitympanic aeration, and mastoid size is unclear.
- Pars flaccida retraction and small mastoid size are common in otitis media.
Purpose of the Study:
- To investigate the relationship between pars flaccida retraction, mastoid pneumatization, and epitympanic aeration in clinically normal specimens.
Main Methods:
- Post-mortem anatomical dissection of 41 adult crania without clinical otitis.
- Pars flaccida retraction assessed using an operating microscope and Sade's classification.
- Mastoid size determined radiographically; CT scans performed on select specimens.
Main Results:
- No pars flaccida retraction exceeded Sade grade two.
- Retractions showed no correlation with mastoid pneumatization extent.
- Epitympani were normal in all specimens via dissection and CT imaging.
Conclusions:
- Pars flaccida retraction is likely associated with prior, transient non-aeration of Prussak's space.
