Budd-Chiari syndrome (BCS) is a group of rare conditions in which veins in the liver become blocked. An ultrasound for BCS may show atypical, narrowed, or potentially blocked veins inside the liver.

Budd–Chiari syndrome (BCS ... 1 and occurs in 1/100,000 of the general population worldwide. 2 The most common presentation is with ascites, but can range from fulminant hepatic failure ...