Modern multimodality diagnosis of portal vein infiltration in hepatocellular carcinoma and expected changes during current therapies.

Diagnosis of malignant portal vein infiltration and especially differentiation from bland thrombosis is challenging for most imaging techniques. The use of contrast-enhanced real-time modern imaging modalities like contrast-enhanced ultrasound (CEUS), volume perfusion CT (VPCT), or dynamic contrast-enhanced MRI (DCE-MRI) with dedicated postprocessing tools provides additional support in difficult cases and is therefore recommended.The purpose of this review is to present a practical overview of strengths and limitations of modern imaging techniques in the diagnosis of malignant infiltration of the portal vein by hepatocellular carcinoma and to describe subsequent changes during therapy.