Involvement of the incudostapedial joint anomaly in conductive deafness

Acta Oto-laryngologica
Mamoru SuzukiMasaaki Shimizu

Abstract

The outcome of surgery depends on complexities of middle ear anomalies and definite diagnosis can only be achieved during exploratory tympanotomy. We must be aware that the pathology of the congenital ossicular anomalies is variable and careful surgery is needed for hearing improvement. This study aimed to investigate congenital ossicular malformation. Fifteen cases of ossicular anomalies without external ear malformation were studied. The anomaly of the incus-stapes complex was the most frequent. There were two cases of fused incudostapedial (IS) joint, which is an extremely rare occurrence. Case 1 was a 33-year-old man, in whom otosclerosis was suspected and exploratory tympanotomy was performed. The IS joint was fused, and the stapes was immobile. Small fenestra stapedectomy was performed. In case 2, a 52-year-old woman, otosclerosis was also suspected and exploratory tympanotomy was performed. The IS joint was fused and the incus was fixed. After the long process of the incus was cut, the stapes became mobile. However, since the incus remained immobile, it was removed and was placed on the stapes. In both cases, the hearing improved after surgery. The averaged hearing gain of 15 cases was 28.8 dB.

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Citations

Nov 10, 2010·Biomechanics and Modeling in Mechanobiology·Xiangming Zhang, Rong Z Gan
Nov 29, 2012·Matrix Biology : Journal of the International Society for Matrix Biology·Elena PokidyshevaHans Peter Bächinger
Aug 25, 2016·Auris, Nasus, Larynx·Kazuhiko TakeuchiSawako Masuda
Apr 16, 2011·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·Sang Cheol KimJae Young Choi
Aug 10, 2018·The Annals of Otology, Rhinology, and Laryngology·Feng Yang, Yang Liu
Feb 27, 2018·Medical Engineering & Physics·Shangyuan Jiang, Rong Z Gan
Jun 13, 2021·The Annals of Otology, Rhinology, and Laryngology·Sara E HenkemansHans G X M Thomeer

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