Endoscopic evaluation of middle ear anatomic variations in autopsy series: analyses of 204 ears

Endoscopic evaluation of middle ear anatomic variations in autopsy series: analyses of 204 ears

Abstract

INTRODUCTION: 

Microsurgery of the ear requires complete evaluation of middle ear surgical anatomy, especially the posterior tympanic cavity anatomy. Preoperative assessment of the middle ear cavity is limited by the permeability of eardrum and temporal bone density. Therefore, middle ear exploration is an extremely useful method to identify structural abnormalities and anatomical variations.

OBJECTIVE: 

The aim of this study is to determine anatomic variations of the middle ear in an autopsy series.

METHODS: 

All evaluations were performed in the Forensic Medicine Institute Morgue Department. The cases over 18 years of age, with no temporal bone trauma and history of otologic surgery included in this study.

RESULTS: 

One hundred and two cadavers were included in the study. The mean age was 49.08±17.76 years. Anterior wall prominence of the external auditory canal was present in 27 of all cadavers (26.4%). The tympanic membrane was normal in 192 ears (94%) while several eardrum pathologies were detected in 12 ears (6%). Agenesis of the pyramidal eminence and stapedial tendon was found in 3 ears. While the ponticulus was bony ridge-shaped in 156 of 204 ears (76.4%), it was bridge-shaped in 25 ears (12.3%). The ponticulus was absent in 23 ears (11.3%). While complete subiculum was present in 136 of all ears (66.7%), incomplete subiculum was present in 21 ears (10.3%). Subiculum was absent in 47 ears (23%). Facial dehiscence was found in 32 ears and the round window niche was covered by a pseudomembrane in 85 ears (41.6%). A fixed footplate was present in 7.4% of all ears, and no persistent stapedial artery was seen in any cases.

CONCLUSION: 

The pseudomembrane frequency covering the round window niche was found different from reports in the literature. In addition, the frequency of the external auditory canal wall prominence has been reported for the first time.

Bu makale 10 Mart 2019 tarihinde güncellendi. 0 kez okundu.

Yazar
Doç. Dr. Bayram Şahin

Doç. Dr. Bayram Şahin Kocaeli Üniversitesi Tıp Fakültesi'nden 2012 yılında dönem birincisi olarak mezun olduktan sonra ihtisas eğitimini İstanbul Üniversitesi İstanbul Tıp Fakültesi (Çapa) Kulak Burun Boğaz Hastalıkları & Baş ve Boyun Cerrahisi Anabilim Dalı'nda 2017 yılında tamamlamıştır. Uzmanlığının ilk yıllarından beri özellikle baş ve boyun kanser cerrahisi, tiroid ve paratiroid cerrahisi, estetik burun cerrahisi, çene ve yüz estetiği alanları ile yakından ilgilenmiştir ve bu alandaki bilimsel gelişmeleri yakından takip etmiştir.

Doç. Dr. Bayram Şahin, Nisan 2023'den beri VM Medical Park Kocaeli Hastanesi'nde görev yapmaktadır. Halen VM Medical Park Kocaeli Hastanesi'nde ameliyathane ve kapalı alanlardan sorumlu başhekim yardımcısı görevlerini sürdürmektedir.

Etiketler
endoscopic ear surgery; middle ear anatomy; ponticulus; pontículo; retrotympanum; retrotímpano; subiculum
Doç. Dr. Bayram Şahin
Doç. Dr. Bayram Şahin
Kocaeli - Kulak Burun Boğaz hastalıkları - KBB
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