Anatomical variants of the azygos system: azygos system variants

Introduction: the conformation of the azygos venous system is variable, it is formed by the azygos vein, the hemiazygos and the accessory hemiazygos. Arranged in parallel with respect to the vena cava, it is important as an alternative route for the venous return to the heart. Materials and method:...

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Autores principales: Cabrera Frola, Juan A., Berke, Andrés, Ignatov, María, Armand Ugón, Gustavo
Formato: Artículo revista
Lenguaje:Español
Publicado: Asociación Argentina de Anatomía Clínica (Argentine Association of Clinical Anatomy) 2020
Materias:
azygos system;anatomical variants;azygos vein.
sistema ácigos;variantes anatómicas;vena ácigos
Acceso en línea:https://revistas.unc.edu.ar/index.php/anatclinar/article/view/28137
Aporte de:
Revista Argentina de Anatomía Clínica de Universidad Nacional de Córdoba
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container_title_str Revista Argentina de Anatomía Clínica
language Español
format Artículo revista
topic azygos system;anatomical variants;azygos vein.
sistema ácigos;variantes anatómicas;vena ácigos
spellingShingle azygos system;anatomical variants;azygos vein.
sistema ácigos;variantes anatómicas;vena ácigos
Cabrera Frola, Juan A.
Berke, Andrés
Ignatov, María
Armand Ugón, Gustavo
Anatomical variants of the azygos system: azygos system variants
topic_facet azygos system;anatomical variants;azygos vein.
sistema ácigos;variantes anatómicas;vena ácigos
author Cabrera Frola, Juan A.
Berke, Andrés
Ignatov, María
Armand Ugón, Gustavo
author_facet Cabrera Frola, Juan A.
Berke, Andrés
Ignatov, María
Armand Ugón, Gustavo
author_sort Cabrera Frola, Juan A.
title Anatomical variants of the azygos system: azygos system variants
title_short Anatomical variants of the azygos system: azygos system variants
title_full Anatomical variants of the azygos system: azygos system variants
title_fullStr Anatomical variants of the azygos system: azygos system variants
title_full_unstemmed Anatomical variants of the azygos system: azygos system variants
title_sort anatomical variants of the azygos system: azygos system variants
description Introduction: the conformation of the azygos venous system is variable, it is formed by the azygos vein, the hemiazygos and the accessory hemiazygos. Arranged in parallel with respect to the vena cava, it is important as an alternative route for the venous return to the heart. Materials and method: 12 adult cadavers and 12 computed tomography scans of adult patients of both sexes. It was registered: type of azygos system (according to Anson classification), caliber at origin and termination of azygos and hemiazygos veins, vertebral level of completion of each one. Results: 14 (58%) female cases, 10 (42%) male cases. Type II was found in 14 (58%) cases, distributed in 9 (38%) cases of subtype 2A, 3 (12%) cases of subtype 2B, 1 (4%) case of subtype 2D, 1 (4%) case of subtype 2C. Type III was found in 9 (38%) cases. 1 (4%) type I case was found. The average caliber of the azygos vein origin was 4.2mm (2mm-7.7mm), and the hemiazygos vein was 3mm (2mm-6.9mm), The termination caliber of the azygos vein was 8.3mm (4.2mm-10.3mm), for the hemiazygos vein it was 4.9mm (3.3mm-7.2mm). The mean vertebral level of the azygos vein was T4 with 14 (58%) cases and the hemiazygos vein T8 with 8 (28.5%) cases. Conclusion: the type of azygos system is variable, and does not correlate with that described by classical authors, but with contemporary authors. There is a great correlation with different authors on the vertebral levels of termination of azygos, hemiazygos and accessory hemiazygos.
publisher Asociación Argentina de Anatomía Clínica (Argentine Association of Clinical Anatomy)
publishDate 2020
url https://revistas.unc.edu.ar/index.php/anatclinar/article/view/28137
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spelling I10-R321-article-281372020-11-18T02:03:15Z Anatomical variants of the azygos system: azygos system variants VARIANTES ANATÓMICAS DEL SISTEMA ÁCIGOS: azygos system variants Cabrera Frola, Juan A. Berke, Andrés Ignatov, María Armand Ugón, Gustavo azygos system;anatomical variants;azygos vein. sistema ácigos;variantes anatómicas;vena ácigos Introduction: the conformation of the azygos venous system is variable, it is formed by the azygos vein, the hemiazygos and the accessory hemiazygos. Arranged in parallel with respect to the vena cava, it is important as an alternative route for the venous return to the heart. Materials and method: 12 adult cadavers and 12 computed tomography scans of adult patients of both sexes. It was registered: type of azygos system (according to Anson classification), caliber at origin and termination of azygos and hemiazygos veins, vertebral level of completion of each one. Results: 14 (58%) female cases, 10 (42%) male cases. Type II was found in 14 (58%) cases, distributed in 9 (38%) cases of subtype 2A, 3 (12%) cases of subtype 2B, 1 (4%) case of subtype 2D, 1 (4%) case of subtype 2C. Type III was found in 9 (38%) cases. 1 (4%) type I case was found. The average caliber of the azygos vein origin was 4.2mm (2mm-7.7mm), and the hemiazygos vein was 3mm (2mm-6.9mm), The termination caliber of the azygos vein was 8.3mm (4.2mm-10.3mm), for the hemiazygos vein it was 4.9mm (3.3mm-7.2mm). The mean vertebral level of the azygos vein was T4 with 14 (58%) cases and the hemiazygos vein T8 with 8 (28.5%) cases. Conclusion: the type of azygos system is variable, and does not correlate with that described by classical authors, but with contemporary authors. There is a great correlation with different authors on the vertebral levels of termination of azygos, hemiazygos and accessory hemiazygos. Introducción: la conformación del sistema venoso ácigos es variable, lo forman las venas ácigos, la hemiácigos y la hemiácigos accesoria. Dispuesto en paralelo respecto a las venas cavas, reviste importancia como vía alternativa, para el retorno venoso hacia el corazón. Materiales y método: 12 cadáveres adultos formolados y 12 tomografías computadas de pacientes adultos de ambos sexos. Se registró: tipo de sistema ácigos (según clasificación de Anson), calibre en origen y terminación de vena ácigos y hemiácigos, nivel vertebral de terminación de cada una. Resultados: 14(58%) casos femeninos, 10(42%) casos masculinos. El tipo II se halló en 14 (58%) casos, distribuido en 9 (38%) casos del subtipo 2A, 3 (12%) casos del subtipo 2B, 1 (4%) caso del subtipo 2D, 1 (4%) caso del subtipo 2C. El tipo III fue encontrado en 9 (38%) casos. Se encontró 1 (4%) caso tipo I. El calibre promedio del origen de vena ácigos fue 4,2mm (2mm-7,7mm), y de la vena hemiácigos fue de 3mm (2mm-6,9mm). El calibre de terminación de la vena ácigos fue 8,3mm (4,2mm-10,3mm), Para la vena hemiácigos fue de 4,9mm (3,3mm-7,2mm).  El nivel vertebral de terminación medio de la vena ácigos fue T4 con 14 (58%) casos y de la vena hemiácigos T8 con 8 (28,5%) casos. Conclusión: el tipo de sistema ácigos es variable, y no se correlaciona con lo descrito por autores clásicos, pero si con autores contemporáneos. Hay gran correlación con distintos autores sobre los niveles vertebrales de terminación de vena ácigos, hemiácigos y hemiácigos accesoria. Asociación Argentina de Anatomía Clínica (Argentine Association of Clinical Anatomy) 2020-07-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unc.edu.ar/index.php/anatclinar/article/view/28137 10.31051/1852.8023.v12.n2.28137 Revista Argentina de Anatomía Clínica (Argentine Journal of Clinical Anatomy); Vol. 12 No. 2 (2020): Jul 2020; 84-89 Revista Argentina de Anatomía Clínica; Vol. 12 Núm. 2 (2020): Jul 2020; 84-89 1852-8023 10.31051/1852.8023.v12.n2 spa https://revistas.unc.edu.ar/index.php/anatclinar/article/view/28137/30242 Derechos de autor 2020 Juan A. Cabrera Frola, Andrés Berke, María Ignatov, Gustavo Armand Ugón http://creativecommons.org/licenses/by-nc/4.0

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