Budd-Chiari Syndrome

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A rare disorder caused by obstruction of the hepatic venous outflow tract resulting in right upper quadrant (RUQ) abdominal pain, portal hypertension (HTN), hepatomegaly, and ascites


  • ~80% of all BCS cases occur in women.
  • Average age of BCS patients is 30 years.
  • ~85% of BCS patients have at least one prothrombotic risk factor; ~25% have two or more.
  • ~40% of BCS patients also have a primary myeloproliferative disorder.

~1/100,000 worldwide per year (1)

~1.4/100,000 worldwide per year (1)

Etiology and Pathophysiology

  • Reduced or obstructed hepatic venous outflow causes increased sinusoidal pressure, resulting in hepatic congestion, RUQ abdominal pain, and ascites.
  • Outflow obstruction can occur anywhere from small hepatic veins to the atriocaval junction.
  • Often classified as (i) primary: obstruction arising from within the venous lumen or (ii) secondary: obstruction from outside the venous lumen
  • Thrombosis of hepatic vein due to inherited thrombophilia or hypercoagulable states
    • Myeloproliferative disease
    • Polycythemia vera
    • Pregnancy or postpartum state
    • Use of oral contraceptives
    • Paroxysmal nocturnal hemoglobinuria
    • Hepatocellular carcinoma (HCC)
    • Antiphospholipid syndrome; prothrombin mutation
    • Factor V Leiden mutation
    • Hyperhomocysteinemia
    • Protein C and S deficiencies
    • Antithrombin III deficiency
    • Inflammatory bowel disease
    • Behçet syndrome
  • Vena caval webs: more common in Asians
  • Idiopathic membranous stenosis of inferior vena cava (IVC)
  • Compression of the hepatic veins:
    • HCC
    • Abscess or cysts; sepsis
    • Status postomphalocele or gastroschisis repair
  • Bush teas (pyrrolizidine alkaloids)
  • Blunt abdominal trauma

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* When formatting your citation, note that all book, journal, and database titles should be italicized* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Budd-Chiari Syndrome ID - 816185 ED - Baldor,Robert A, ED - Domino,Frank J, ED - Golding,Jeremy, ED - Stephens,Mark B, BT - 5-Minute Clinical Consult, Updating UR - https://im.unboundmedicine.com/medicine/view/5-Minute-Clinical-Consult/816185/all/Budd_Chiari_Syndrome PB - Wolters Kluwer ET - 27 DB - Medicine Central DP - Unbound Medicine ER -