EUS can easily sample celiac lymph nodes, which cannot be reached by the other mediastinal staging methods.

Efferent lymphatic vessels from the duodenal lymph nodes ultimately pass into the celiac lymph nodes.

Those related to the branches of the celiac artery (the celiac lymph nodes or coeliac lymph nodes) form three sets, gastric, hepatic, and pancreaticolienal.

The preaortic lymph nodes lie in front of the aorta, and may be divided into celiac lymph nodes, superior mesenteric lymph nodes, and inferior mesenteric lymph nodes groups, arranged around the origins of the corresponding arteries.