Left gastric artery
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Anatomy
Origin
The LGA usually arises from (the superior aspect of) the coeliac trunk - sometimes as a terminal branch of a trifurcation, and more rarely as a side branch of the splenic artery or of common hepatic artery. Sometimes it originates directly from aorta or from arteria phrenica inferior.[2]
Course
From the crus of diaphragm, the LGA arches obliquely anterior-ward and to the left to reach the left curvature of the stomach just inferior to the gastric cardia (thus erecting the gastropancreatic (peritoneal) fold).[2]
Fate
Upon reaching the cardia, the LGA splits into two terminal branches - a ventral one and a dorsal one - which anastomose with corresponding terminal branches of the right gastric artery, together providing arterial supply to the lesser curvature of the stomach.[2]
Branches
Besides its terminal ventral branch and dorsal branch, the LGA yields multiple side branches: the left lateral hepatic artery, posterior esophageal artery, anterior esophagocardiotuberous artery, branches to lymph nodes, and omental branches.[2]
Clinical significance
In terms of disease, the left gastric artery may be involved in peptic ulcer disease: if an ulcer erodes through the stomach mucosa into a branch of the artery, this can cause massive blood loss into the stomach, which may result in such symptoms as hematemesis or melaena.
Additional images
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Blood supply to the stomach: left and right gastric artery, left and right gastro-omental artery and short gastric artery.[3]
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The celiac artery and its branches; the stomach has been raised and the peritoneum removed.
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Arteries and veins around the pancreas and spleen.
![Blood supply to the stomach: left and right gastric artery, left and right gastro-omental artery and short gastric artery.[3]](/wiki143/index.php?title=File:Stomach_blood_supply.svg){kind=link}
References
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External links
- Anatomy photo:38:01-0103 at the SUNY Downstate Medical Center - "Stomach, Spleen and Liver: The Right and Left Gastric Artery"
- Cross section image: pembody/body8a—Plastination Laboratory at the Medical University of Vienna
- celiactrunk at The Anatomy Lesson by Wesley Norman (Georgetown University)
- Branching at uhrad.com
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