The retro- and hypotympanum are hidden areas of the middle ear, only poorly recognized. Nevertheless, this region is of relevant clinical significance, since it is regularly affected by disease such as cholesteatoma. The aim of this study is to explore and describe the anatomical variants of the hypo- and retrotympanum by the means of transcanal endoscopy. We hypothesize a significant variability of this hidden region of the middle ear. Moreover, we believe that the minimal invasive, endoscopic access is suitable since angled scopes may be used to explore the region. To this end a total of 125 middle ears (83 cadaveric dissections, 42 surgical cases) were explored by the means of 3 mm straight and angled scopes. The variants were documented photographically and tabularized. The bony crests ponticulus, subiculum and finiculus were most frequently represented as ridges. The ponticulus showed the highest variability with 38% ridge, 35% bridge and 27% incomplete presentation. The subiculum was bridge-shaped only in 8% of the cases, the finiculus in 17%. The sinus tympani had a normal configuration in 66%. A subcochlear canaliculus was detectable in 50%. The retro- and hypotympanum were classified, respectively, to the present bony crests and sinus in a novel classification type I–IV. In conclusion, we found abundant variability of the bony structures in the retro- and hypotympanum. The endoscopic access is suitable and offers thorough understanding and panoramic views of these hidden areas.

The variants of the retro- and hypotympanum: an endoscopic anatomical study / Bonali, Marco; Anschuetz, Lukas; Fermi, Matteo; Villari, Domenico; Mariani, Giulia Adalgisa; Manzoli, Lucia; Caversaccio, Marco; Presutti, Livio. - In: EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY. - ISSN 0937-4477. - 274:5(2017), pp. 2141-2148. [10.1007/s00405-017-4492-0]

The variants of the retro- and hypotympanum: an endoscopic anatomical study

Bonali, Marco;FERMI, MATTEO;Villari, Domenico;Presutti, Livio
2017

Abstract

The retro- and hypotympanum are hidden areas of the middle ear, only poorly recognized. Nevertheless, this region is of relevant clinical significance, since it is regularly affected by disease such as cholesteatoma. The aim of this study is to explore and describe the anatomical variants of the hypo- and retrotympanum by the means of transcanal endoscopy. We hypothesize a significant variability of this hidden region of the middle ear. Moreover, we believe that the minimal invasive, endoscopic access is suitable since angled scopes may be used to explore the region. To this end a total of 125 middle ears (83 cadaveric dissections, 42 surgical cases) were explored by the means of 3 mm straight and angled scopes. The variants were documented photographically and tabularized. The bony crests ponticulus, subiculum and finiculus were most frequently represented as ridges. The ponticulus showed the highest variability with 38% ridge, 35% bridge and 27% incomplete presentation. The subiculum was bridge-shaped only in 8% of the cases, the finiculus in 17%. The sinus tympani had a normal configuration in 66%. A subcochlear canaliculus was detectable in 50%. The retro- and hypotympanum were classified, respectively, to the present bony crests and sinus in a novel classification type I–IV. In conclusion, we found abundant variability of the bony structures in the retro- and hypotympanum. The endoscopic access is suitable and offers thorough understanding and panoramic views of these hidden areas.
2017
27-feb-2017
274
5
2141
2148
The variants of the retro- and hypotympanum: an endoscopic anatomical study / Bonali, Marco; Anschuetz, Lukas; Fermi, Matteo; Villari, Domenico; Mariani, Giulia Adalgisa; Manzoli, Lucia; Caversaccio, Marco; Presutti, Livio. - In: EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY. - ISSN 0937-4477. - 274:5(2017), pp. 2141-2148. [10.1007/s00405-017-4492-0]
Bonali, Marco; Anschuetz, Lukas; Fermi, Matteo; Villari, Domenico; Mariani, Giulia Adalgisa; Manzoli, Lucia; Caversaccio, Marco; Presutti, Livio...espandi
File in questo prodotto:
File Dimensione Formato  
bonali2017.pdf

Accesso riservato

Tipologia: Versione pubblicata dall'editore
Dimensione 1.76 MB
Formato Adobe PDF
1.76 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1154374
Citazioni
  • ???jsp.display-item.citation.pmc??? 7
  • Scopus 38
  • ???jsp.display-item.citation.isi??? 35
social impact