Vessel
Pancreaticoduodenal arteries
Shared arterial arcades around pancreatic head and duodenum
High-yield
The pancreatic head and adjacent duodenum share this network. The major papilla marks a developmental foregut–midgut transition, not a sharp boundary without vascular overlap.
Overview
Superior and inferior pancreaticoduodenal branches form connections on the anterior and posterior sides of the pancreatic head. They couple the celiac circulation, through the gastroduodenal artery, with superior mesenteric supply.
Reference facts
- Origin
- Superior branches usually arise from gastroduodenal; inferior branches arise through the inferior pancreaticoduodenal artery from the SMA, sometimes with a jejunal trunk.
- Course
- Form communicating anterior and posterior pathways between pancreatic head and duodenal wall.
- Branches
- Numerous pancreatic and duodenal branches arise along the arcades.
- Supplies
- Supply the pancreatic head/uncinate region and much of the duodenum, with contributions from neighboring vessels.
- Drains to
- Associated veins empty into superior mesenteric and portal venous tributaries.
Clinical correlation
Shared vessels help explain why pancreatic-head resections often include adjacent duodenum. They do not make separation universally impossible; the operation depends on disease and the vascular anatomy preserved.
Frequently asked questions
Where do the pancreaticoduodenal arteries originate?
Superior branches usually arise from gastroduodenal; inferior branches arise through the inferior pancreaticoduodenal artery from the SMA, sometimes with a jejunal trunk.
What do the pancreaticoduodenal arteries supply?
Supply the pancreatic head/uncinate region and much of the duodenum, with contributions from neighboring vessels.
Where do the pancreaticoduodenal arteries drain to?
The pancreaticoduodenal arteries drain to the associated veins empty into superior mesenteric and portal venous tributaries.
What are the branches of the pancreaticoduodenal arteries?
Branches of the pancreaticoduodenal arteries include the numerous pancreatic and duodenal branches arise along the arcades.