Acute Budd-Chiari Syndrome

1Division of Gastroenterology; 2Department of Laboratory Medicine; 3Department of Surgery, University of British Columbia, Vancouver, British Columbia Correspondence: Dr Eric M Yoshida, Division of Gastroenterology, Vancouver General Hospital, Diamond Health Care Centre, 5153-2775 Laurel Street, Vancouver, British Columbia V5Z 1M9. Telephone 604-875-5371, fax 604-875-5447, e-mail eric.yoshida@vch.ca Received for publication April 8, 2011. Accepted April 11, 2011 CASE PRESENTATION A 23-year-old woman presented to hospital with a two-week history of abdominal pain, nausea and increasing abdominal girth. Her medical history was significant only for migraines and oral contraceptive use. Laboratory values showed an alanine aminotransferase level of 155 U/L, an aspartate aminotransferase level of 85 U/L, an alkaline phosphatase level of 165 U/L, total bilirubin of 12 μmol/L (0.71 mg/dL), an albumin concentration of 27 g/L (2.7 g/dL) and an international normalized ratio of 1.2. An abdominal Doppler ultrasound and a computed tomography angiogram (Figure 1) demonstrated a nonocclusive, intrahepatic inferior vena cava (IVC) clot measuring 3.4 cm × 1.4 cm, as well as marked ascites. The patient subsequently began to develop congestive hepatopathy and was scheduled for emergency placement of a portocaval shunt to protect her liver function. Caudate lobectomy was required to expose the IVC for a polytetrafluoroethylene graft anastomosis. Pathology of the caudate lobe and random biopsies from the right and left lobes showed focal hepatic vein and central venous organizing thrombosis with concomitant sinusoidal dilation (Figure 2). The patient had a relatively uncomplicated postoperative recovery. Portocaval shuntogram and pressure measurements showed a widely patent shunt with no significant pressure gradient. Thrombophilia workup was negative for any identifiable intrinsic clotting disorder. DISCUSSION Budd-Chiari syndrome is caused by thrombosis of the hepatic veins and/or the thrombosis of the intrahepatic or suprahepatic IVC. While an underlying etiology such as malignancy, rheumatological disorder, myeloproliferative disease, inheritable coagulopathy, infection or hyperestrogen state can be identified in many cases, the etiology remains idiopathic in 16% to 35% of cases (1-3). Clinical presentations vary – ranging from acute or fulminant liver failure, to subacute (signs or symptoms for less than six months and no evidence of liver cirrhosis) to chronic (signs or symptoms for more than six months with evidence of portal hypertension and cirrhosis). The goals of therapy are to prevent the propagation of the clot, restore patency of thrombosed veins, decompress liver congestion and manage complications such as ascites and portal hypertension. For acute thrombosis, thrombolytic therapy or radiological procedures (eg, angioplasty, stenting or transjugular intrahepatic portosystemic shunts) can be considered; however, surgical decompression remains the mainstay of treatment. Surgical shunts commonly connect the portal venous system to the IVC, creating a low-pressure route for hepatic arterial blood to drain from the liver. In patients who underwent shunt surgery before development of cirrhosis and whose shunts remain patent, five-year survival rates of as high as 89% have been reported (4-6). Chronic Budd-Chiari syndrome is managed with anticoagulation and treatment of the complications of liver failure. Rarely, liver transplantation may be necessary. IMAGE OF THE MONTH

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