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SMA – superior mesenteric artery, CA – celiac artery, K – kink in the aorta, RA – renal arteries, AA – abdominal aorta, IVC – inferior vena cava, LRV- left renal vein, RK – right kidney, LK – left kidney, LTA – left testicular artery, LU – left ureter, IMA – inferior mesenteric artery, ARA – accessory renal artery.

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Superior mesenteric artery (SMA) syndrome is a very rare, life-threatening gastro-vascular disorder characterized by a compression of the third portion of the duodenum by the abdominal aorta (AA) and the overlying superior mesenteric artery.

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superior mesenteric artery (L1) NOTE: inferior pancreaticoduodenal artery

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Stage III pancreatic cancer; drawing shows cancer in the pancreas, common hepatic artery, and portal vein. Also shown are the celiac axis (trunk), bile duct, pancreatic duct, duodenum, and superior mesenteric artery.

Nutcracker syndrome is a vascular compression disorder, and refers to the compression of the left renal vein between the superior mesenteric artery (SMA) and aorta. This can lead to renal venous hypertension, resulting in rupture of thin-walled veins into the collecting system with resultant haematuria. Read more: http://radiopaedia.org/articles/nutcracker_syndrome

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Variant common hepatic artery arising from superior mesenteric artery | Image | Radiopaedia.org