CT diagnosis of cavernous transformation of portal vein

Objective: To study the CT features of cavernous transformation of the portal vein (CTPV) and to evaluate the diagnostic reliability of CT. Methods: Ten patients with CTPV underwent abdominal precontrast and contrast CT. The CT findings were compared with DSA and surgical findings. Results: Characteristic features included loss of the normal structure of the portal system and the presence of multiple, sinuous, periportal vascular structures which were enhanced during the portal phase. Transient abnormality of hepatic perfusion, characterized by the image of homogeneous bands, can be observed in arterial phase, which is not detectable in venous phase. Conclusion: CT proved to be reliable for the diagnosis of CTPV, and provides essential information for clinical treatment planning. Additional DSA examination and US were indicated for atypical patients for a more reliable diagnosis.