[Anterior epitympanic recess--CT assessment].

Area of Science:

• Otolaryngology
• Anatomy
• Medical Imaging

Background:

• Middle ear aeration is crucial for proper function and successful surgical reconstruction in chronic otitis media.
• The anterior epitympanic recess (AER) is being investigated as a potential secondary ventilation pathway.

Purpose of the Study:

• To evaluate the aeration and structural characteristics of the AER in healthy ears and in ears affected by cholesteatoma.
• To determine if the AER can function as an alternative route for middle ear ventilation.

Main Methods:

• Retrospective analysis of preoperative axial CT scans of temporal bones.
• Comparison of CT findings with intraoperative observations in patients undergoing surgery for cholesteatoma.
• Analysis of 34 healthy ears, 25 ears with pars tensa perforation, and 29 ears with pars flaccida perforation.

Main Results:

• In healthy ears, the AER typically consists of a single cell or multiple small cells.
• AER structure was assessable in over half of cholesteatoma ears and showed no significant difference from healthy ears.
• In pars tensa cholesteatoma with a closed tympanic isthmus, AER aeration suggests an alternative ventilation route via the anterior attic.

Conclusions:

• The AER demonstrates aeration in a significant portion of healthy and cholesteatoma-affected ears.
• The findings suggest the AER can act as an additional ventilation pathway for the middle ear.
• Further research into the AER's role in middle ear aeration is warranted, particularly in the context of chronic otitis media and cholesteatoma.