Pseudotumorous hyperplasia of the caudate lobe in the non-cirrhotic liver: MR and CT arterial portography appearance.

We describe the magnetic resonance image and computed tomographic arterial portography appearance of pseudotumorous hyperplasia in the caudate process of the caudate lobe in a non-cirrhotic patient. A prominent portal vein branch directly arising from the right main portal branch was seen in the center of the lesion on magnetic resonance imaging and computed tomographic arterial portography. We think that portal flow change of the caudate lobe by an anomalous portal branch may be correlated to pseudotumorous hyperplasia.