Vessel
Inferior phrenic arteries
Paired diaphragmatic arteries with variable origins
High-yield
The superior suprarenal arteries usually originate here. An aortic origin is common, but these vessels should not be defined as invariably the first paired aortic branches.
Overview
Inferior phrenic arteries spread over the underside of the diaphragm and give superior suprarenal branches. They may arise from the aorta, celiac trunk or other nearby vessels, separately or through a common trunk.
Reference facts
- Origin
- Variable: frequently abdominal aorta or celiac trunk, with other origins and shared trunks documented.
- Course
- Ascend across the diaphragmatic crura and distribute over the inferior diaphragmatic surface.
- Branches
- Give diaphragmatic branches and superior suprarenal branches; additional neighboring visceral branches can occur.
- Supplies
- Mainly the inferior diaphragm and superior parts of the adrenal glands.
- Drains to
- Associated veins reach the IVC or, on the left, renal/suprarenal venous pathways, with anatomical variation.
Clinical correlation
Inferior phrenic branches may become collateral feeders to liver tumors near the diaphragm. Their variable origins therefore matter when interpreting tumor vascular supply.
Frequently asked questions
Where do the inferior phrenic arteries originate?
Variable: frequently abdominal aorta or celiac trunk, with other origins and shared trunks documented.
What do the inferior phrenic arteries supply?
Mainly the inferior diaphragm and superior parts of the adrenal glands.
Where do the inferior phrenic arteries drain to?
The inferior phrenic arteries drain to the associated veins reach the IVC or, on the left, renal/suprarenal venous pathways, with anatomical variation.
What are the branches of the inferior phrenic arteries?
Give diaphragmatic branches and superior suprarenal branches; additional neighboring visceral branches can occur.