The authors report the magnetic resonance (MR) and computed tomography
(CT) features of what is believed to be thrombophlebitis of the left
cava of a duplicated IVC, which mimicked lymphadenopathy, and prompted
both a CT-guided needle aspiration biopsy and surgical exploration. K
nowledge that retroperitoneal vascular anomalies can mimick lymphadeno
pathy, both clinically and radiographically, may help obviate further
testing and intervention.