Objective:This paper aims to retrospectively analyze 3 cases of Budd- Chiari syndrome patients which the distal end of inferior vena cava has no dilatation and to put forward the suggestion to this kind of patients.Method:The study was carried out from April 2011 to July 2012 on 3 cases of Budd- Chiari syndrome which underwent interventional therapy. Based on the imaging findings, clinical features and the experience during the operations, the comparison was made among those 3 cases.Result:Among those 3 cases, 1 case died of severe hemopericardium caused by the stent displacement, 1 case died of severe cirrhosis induced hepatic failure. The other 1 case with portal hypertension symptoms has been obviously improved, and has no severe complications so far, followed up of normal. Conclusion: Generally,the distal end of the inferior vena cava of the Budd- Chiari syndrome wil be dilated because of the increased blood pressure, but to patients with no inferior vena cava dilation, there are a variety of reasons to explain, including the collateral circu-lation is rich enough to be compensatory for the inferior vena cava dilation caused by the returned blood flow, or the inferior vena ve-nous wall has lesions in itself, such as chronic thrombosis, blood vessel wall fibrosis, which would lead to vascular elastic recoil enhance-ment and cause the inferior vena cava dilation. In this latter case, the effect of lining stent to support the inferior vena cava is not ideal, and there is the risk of stent displacement, which should cause the attention of the majority of scholars in particular.
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