Hepatic Encephalopathy (HE) is a neuropsychiatric syndrome that occurs in up to 30% of patients with cirrhosis. HE may be a consequence of pure liver failure, as in patients with fulminant hepatitis, or of the combination of liver failure and portal-systemic shunting, as in patients with liver cirrhosis. Several clinical and pathophysiologic observations suggest the importance of portal-systemic shunts in the development of HE. Episodes of HE are usually related to precipitating events, such as infections or gastrointestinal bleeding; a minority of cirrhotic patients experienced a chronic HE, refractory to standard medical treatment. This latter type of HE should be related to spontaneous or radiological (such as Transjugular Intrahepatic Portosystemic Shunt (TIPS)) portal systemic shunts, that could be restricted or occluded in patients with chronic HE. Both TIPS reduction and shunt occlusion are radiological procedures, safe and effective to ameliorate neurological symptoms in patients with refractory HE. ( J CLIN EXP HEPATOL 2018;8:452-459) PORTOSYSTEMIC SHUNTS IN CIRRHOSIS-CLASSIFICATION, TYPES, CLINICAL IMPLICATIONS, NATURAL HISTORY SPSSs are, as the name implies, potential communications between the portal venous system and the systemic venous circulation than can open and grow when portal pressure increases. These SPSS act as "release valves" to reduce the portal pressure, but also act as bypasses to normal liver flow. At one point, the shunt becomes large enough that it starts contributing to the progression of the liver disease. 8 The main types of SPSSs are: paraumbilical vein, splenorenal, splenoiliac with internal hemorrhoids, esophageal varices and gastrocaval, indirect gastrocaval, gastrorenal associated with gastric varices. 8 SPSSs can be classified into left-sided and right-sided (central) shunts; the most frequent right-side shunt is represented by recanalization of paraumbilical vein, while the most common left-sided shunts are gastrorenal shunt, observed in 85% of patients with gastric varices, gastrocaval shunt and splenorenal shunt. The clinical manifestations of these latter shunts comprise gastric variceal bleeding, HE and portal vein