Diagnostic Approach to Budd-Chiari Syndrome
Diagnostic Imaging
- Doppler ultrasound is the first-line and definitive radiographic study for evaluating Budd-Chiari syndrome, with a diagnostic sensitivity exceeding 75% when performed by an experienced operator, as recommended by the American Association for the Study of Liver Diseases 1, 2
- The American College of Radiology suggests that Doppler ultrasound by an experienced operator is sufficient to establish or rule out BCS in most patients when the operator is aware of the diagnostic suspicion 2, 3
- Distinctive features of BCS on Doppler ultrasound include absence of visualization or tortuosity of hepatic veins, intrahepatic or subcapsular hepatic venous collaterals (found in >80% of cases), and caudate lobe enlargement, according to the Society of Radiologists in Ultrasound 2, 3
Second-Line Investigations
- MRI with hepato-specific contrast agents is useful for detecting/characterizing hypervascular liver nodules prior to treatment, as recommended by the European Association for the Study of the Liver 4, 5
- MRI is less effective than ultrasound in demonstrating intrahepatic collaterals, but more accurate than venacavography for characterizing solid endoluminal material, according to the American College of Radiology 2, 3
- CT scan has limitations, including high false positive and indeterminate results (~50%), radiation exposure, and potential renal toxicity from contrast agents, as noted by the National Institute of Diabetes and Digestive and Kidney Diseases 2, 3
Third-Line Investigation
- Direct X-ray venography (hepatic venography) is needed for establishing diagnosis in difficult cases and essential for precise delineation of obstructive lesions before planning treatment, as recommended by the Society of Interventional Radiology 2, 3