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Original article
Submitted: 2023-10-27
Accepted: 2023-12-06
Published online: 2023-12-19
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Arc of Riolan revisited-proposal of a new classification system

Filip Kęska1, Julian Radoń1, Aleksiej Juszczak1, Jerzy Walocha1, Artur Pasternak1
·
Pubmed: 38152920
Affiliations
  1. Department of Anatomy, Jagiellonian University Medical College, Krakow, Poland

open access

Ahead of Print
ORIGINAL ARTICLES
Submitted: 2023-10-27
Accepted: 2023-12-06
Published online: 2023-12-19

Abstract

Background: The arterial supply of the large colon is provided by the superior mesenteric artery (SMA) and inferior mesenteric artery (IMA). A particularly important area, especially in the field of colorectal surgery is the splenic flexure of the colon. There is a noticeable misunderstanding in the correct nomenclature of the major arterial anastomoses between SMA and IMA – Drummond’s Marginal Artery (DMA), Arc of Riolan (AOR), and Moskovitz Artery (MA). The aim of this study is to organize the nomenclature and propose a new simplified one to facilitate communication between physicians of various specialties.

Materials and methods: Fourteen formalin-fixed cadavers (9 male, 5 female) accessible from the Chair of Anatomy of the Jagiellonian University Collegium Medicum were dissected to examine and describe the anatomical variations of anastomoses between SMA and IMA.

Results: The artery of Drummond was present in all 14 specimens maintaining the continuity of the vessel along its entire course. The Arc of Riolan was found in 7 out of 14 cadavers (50%). The artery of Moskovitz was not found. The average length measured between IMA and aortic bifurcation and between IMA and SMA was 51,00 mm and 84,68mm respectively.  

Conclusions: SMA and IMA anastomoses form an arterial network that is characterized by high variability and trail in surgically strategic areas. For this reason, simplifying the terminology and using unambiguous names of these vessels based on their trail and anatomical relationship with IMV are crucial for the proper planning and execution of surgical procedures performed on the colon.  

Abstract

Background: The arterial supply of the large colon is provided by the superior mesenteric artery (SMA) and inferior mesenteric artery (IMA). A particularly important area, especially in the field of colorectal surgery is the splenic flexure of the colon. There is a noticeable misunderstanding in the correct nomenclature of the major arterial anastomoses between SMA and IMA – Drummond’s Marginal Artery (DMA), Arc of Riolan (AOR), and Moskovitz Artery (MA). The aim of this study is to organize the nomenclature and propose a new simplified one to facilitate communication between physicians of various specialties.

Materials and methods: Fourteen formalin-fixed cadavers (9 male, 5 female) accessible from the Chair of Anatomy of the Jagiellonian University Collegium Medicum were dissected to examine and describe the anatomical variations of anastomoses between SMA and IMA.

Results: The artery of Drummond was present in all 14 specimens maintaining the continuity of the vessel along its entire course. The Arc of Riolan was found in 7 out of 14 cadavers (50%). The artery of Moskovitz was not found. The average length measured between IMA and aortic bifurcation and between IMA and SMA was 51,00 mm and 84,68mm respectively.  

Conclusions: SMA and IMA anastomoses form an arterial network that is characterized by high variability and trail in surgically strategic areas. For this reason, simplifying the terminology and using unambiguous names of these vessels based on their trail and anatomical relationship with IMV are crucial for the proper planning and execution of surgical procedures performed on the colon.  

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Keywords

intermesenteric anastomosis, IMA, SMA, Moskowitz artery, inferior mesenteric vein, cadaveric study

About this article
Title

Arc of Riolan revisited-proposal of a new classification system

Journal

Folia Morphologica

Issue

Ahead of Print

Article type

Original article

Published online

2023-12-19

Page views

239

Article views/downloads

295

DOI

10.5603/fm.98013

Pubmed

38152920

Keywords

intermesenteric anastomosis
IMA
SMA
Moskowitz artery
inferior mesenteric vein
cadaveric study

Authors

Filip Kęska
Julian Radoń
Aleksiej Juszczak
Jerzy Walocha
Artur Pasternak

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