Budd-Chiari Syndrome

Budd-Chiari Syndrome is a rare condition that affects the liver by blocking the veins that carry blood out of it. This blockage causes blood to back up, leading to liver swelling, pain in the upper right abdomen, and sometimes fluid buildup in the belly called ascites. The condition mainly involves the hepatic veins and can cause serious problems with liver function. People with this syndrome may experience symptoms like fatigue, abdominal discomfort, and swelling in the legs. If untreated, it can lead to liver damage and complications related to poor blood flow.

Budd-Chiari Syndrome is defined as the obstruction of the hepatic venous outflow tract, which can occur anywhere from the small hepatic veins to the junction of the inferior vena cava and right atrium. The core pathology involves thrombosis or stenosis of these veins, often due to underlying hypercoagulable states such as myeloproliferative disorders, factor V Leiden mutation, or oral contraceptive use. This venous obstruction leads to increased hepatic sinusoidal pressure, causing hepatomegaly, portal hypertension, and subsequent liver ischemia. Clinically, it presents with the triad of abdominal pain, ascites, and hepatomegaly. The syndrome is significant because it can rapidly progress to liver failure and requires prompt diagnosis and management to prevent severe complications.