Castleman disease mimicking liver tumor: CT and MR features.

We report the CT and MR features of two localized abdominal forms of Castleman disease mimicking hypervascular liver tumors due to their unusual location in the porta hepatis and the portacaval space. The MR appearance of Castleman lymph nodes is emphasized, including their characteristics on dynamic turbo-fast low angle shot (FLASH) sequences after Gd-DOTA bolus injection. Our report suggests that the CT and MR features of Castleman lymph nodes in these locations cannot enable their differentiation from other hypervascular masses such as benign liver tumors.