Mediastinal pseudotumors are present in less than 5% of patients with
long-standing portal hypertension. These pseudotumors may be caused by
para-esophageal collateral vessels or greatly dilated azygos or hemia
zygos veins. Enhanced CT seems to be the best tool for the diagnosis a
nd in evaluating the overall status of portosystemic collateral vessel
s. In this case report, MRI ruled out tissular mass by showing vascula
r signal.