Splenorenal shunt venous aneurysm

Last revised by Daniel J Bell on 2 Apr 2023

Splenorenal shunt venous aneurysms are rare venous aneurysms that usually develop in a setting of portal venous hypertension on a background of cirrhosis in those with an associated inherent venous wall weakness 1.

These venous aneurysms are rare, and there are no reported incidence rates in the literature.

The portal venous hypertension, increases the flow within splenorenal shunts, leading to venous dilatation and aneurysms 2.

These lesions are seen as saccular or fusiform focal abnormal venous dilatation, with a feeding vein arising from the splenic vein, and draining collateral in the left renal vein.

They can be treated with surgical ligation or balloon-occluded retrograde transvenous obliteration 1.

These lesions tend to grow over time, as the portal vein pressure rises, and may eventually rupture.

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