Related Experiment Video
Updated: Sep 17, 2026

Multimodality Diagnosis of Mesenteric Ischemia
Published on: July 21, 2023
Hemodynamic Insights Into an Accessory Splenic Artery Aneurysm Arising From the Superior Mesenteric Artery
Junwei Mao1, Chengkai Hu2, Yulong Huang3
1University of Shanghai for Science and Technology, Shanghai, China.
Background:
Splenic artery variations involve anomalies in origin, course, and branching. Notably, the accessory splenic artery (ASA) is a rare independent, ectopic aberrant duplication outside the celiac trunk, making its comprehension crucial for safety during endovascular interventions.
Case Summary:
This case report describes a 34-year-old woman with a rare splenic artery duplication, consisting of a primary splenic artery normally originating from the celiac trunk and an ASA arising from the superior mesenteric artery that harbored a distal saccular aneurysm.
Discussion:
An ASA originating from the superior mesenteric artery and associated with aneurysm formation is an extremely rare anatomical variation. Hemodynamic evaluations based on computational fluid dynamics simulation indicated that the unique vascular configuration of this aberrant artery may predispose the aneurysm to an elevated risk of rupture.
Take-Home Message:
This type of accessory splenic artery originating from the superior mesenteric artery is reported here for the first time.
Related Concept Videos
Abdominal Aorta
The celiac trunk, a singular artery, divides into the left gastric artery, which...
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Blood Supply to the Digestive System
Blood Supply to the Digestive System: The splanchnic circulation involves three main arteries: the celiac artery (also known as the celiac trunk) and the superior and inferior mesenteric...
Aneurysm I: Introduction
Thoracic Aorta
Anastomoses
Anastomoses can be formed at arterial, venous, and lymphatic vessels.
Arterial Anastomosis: These occur between arteries. They are most common in...
