门静脉海绵样变性的CT诊断及临床意义

目的 :分析门静脉海绵样变性病人的 CT表现和特征 ,探讨 CT诊断该病的价值及临床意义。方法 :对 2 6例经 DSA,手术或 US证实且均做腹部 CT平扫和增强扫描门静脉海绵样变性病人进行回顾性分析。结果 :主要 CT表现为门静脉走行区结构紊乱 ,正常结构消失 ;在门静脉走行区出现血管或迂曲、扩张窦隙样血管结构 ,其在门静脉期明显强化。在动脉期 ,可见到周围肝实质短暂灌注异常 ,表现为带状高密度影 ,而在静脉期迅速消失。结论 :CT是诊断门静脉海绵样变性的有效方法。认识门静脉海绵样变性的 CT特征对避免错误的 CT诊断及指导临床制定正确的治疗计划都具有重要的意义

CT Diagnosis and Clinical Significance of Cavernous Transformation of Portal Vein

Objective:To study the CT features of cavernous transformation of the portal vein and to evaluate the diagnostic capability of CT.Methods:26 patients with cavernous transformation of the portal vein comfirmed by DSA,openation or US were reviewed.Noncontrast-enhanced CT and contrast-enhanced CT were performed in all patients.Results:The characteristic features included loss of the normal architecture of the portal system and the presence of multiple,sinuous,periportal vascular structures which were enhanced during the portal phase.The transient abnormal perfusion as a homogeneous band in hepatic peripheral parenchyma could be visualized in arterial phase and disappeared in venous phase.Conclusion:CT is a valuable diagnostic procedure to reveal cavernous transformation of portal vein.An understanding of the CT appearances of cavernous transformation of portal vein will allow more definitive diagnosis for the clinic and avoid false diagnosis.