Vessel
Sigmoid arteries
Inferior mesenteric branches spreading through the sigmoid mesocolon
High-yield
The number and arrangement of branches vary. At the rectosigmoid junction, the lowest sigmoid and superior rectal supplies form a clinically relevant collateral junction.
Overview
Sigmoid arteries fan from the inferior mesenteric system into the sigmoid mesocolon. Their communicating branches supply the mobile sigmoid colon and link it with descending-colon and superior-rectal arterial territories.
Reference facts
- Origin
- Several branches, often two to four, usually arise from the inferior mesenteric artery.
- Course
- Course through the sigmoid mesocolon and form communicating arterial loops.
- Branches
- Join the left-colic network above and superior-rectal network below, giving branches toward the bowel wall.
- Supplies
- Supply sigmoid colon and adjacent distal descending-colon territory.
- Drains to
- Associated sigmoid veins collect into the inferior mesenteric venous system.
Frequently asked questions
Where do the sigmoid arteries originate?
The sigmoid arteries arise from the several branches, often two to four, usually arise from the inferior mesenteric artery.
What do the sigmoid arteries supply?
Supply sigmoid colon and adjacent distal descending-colon territory.
Where do the sigmoid arteries drain to?
The sigmoid arteries drain to the associated sigmoid veins collect into the inferior mesenteric venous system.
What are the branches of the sigmoid arteries?
Branches of the sigmoid arteries include the join the left-colic network above and superior-rectal network below, giving branches toward the bowel wall.