The authors have no funding, financial relationships, or conflicts of interest to disclose.
Inferior retrotympanum revisited: An endoscopic anatomic study†
Article first published online: 1 JUN 2010
Copyright © 2010 The American Laryngological, Rhinological, and Otological Society, Inc.
Volume 120, Issue 9, pages 1880–1886, September 2010
How to Cite
Marchioni, D., Alicandri-Ciufelli, M., Piccinini, A., Genovese, E. and Presutti, L. (2010), Inferior retrotympanum revisited: An endoscopic anatomic study. The Laryngoscope, 120: 1880–1886. doi: 10.1002/lary.20995
- Issue published online: 23 AUG 2010
- Article first published online: 1 JUN 2010
- Manuscript Accepted: 17 MAR 2010
- Manuscript Revised: 16 MAR 2010
- Manuscript Received: 6 FEB 2010
- sinus subtympanicus;
- endoscopic approach;
- middle ear anatomy;
- Level of Evidence: 4
To describe the inferior retrotympanic anatomy from an endoscopic perspective.
This was an anatomic study on a retrospective case series.
During November 2009 and December 2009, videos from endoscopic middle ear procedures carried out between June 2007 and November 2009 and stored in our database were retrospectively reviewed. Surgeries in which the inferior retrotympanic region was visualized were included in the study. Accurate descriptions of the anatomic findings were made for each ear included in the study group.
The final study group consisted of 25 videos from 25 ear procedures. In 14/25 subjects, a bony ridge connecting the inferior portion of the styloid prominence to the anterior and inferior lip of the round window niche (Proctor's sustentaculum promontory) was identified and renamed the finiculus (from the Latin finis, -is: borderline), representing the ideal limit between the inferior retrotympanum and hypotympanum. In 14/25 patients, a complete sinus subtympanicus could be identified, lying between the subiculum and finiculus.
Endoscopic exploration of the middle ear might guarantee a very good exposure of the inferior retrotympanum, allowing detailed anatomic descriptions of this hidden area. Improvement in our knowledge of its anatomy might decrease the possibility of residual disease during cholesteatoma surgery. Laryngoscope, 2010