Venous Hemangioma Presenting as a Mediastinal Cyst on CT

tumors. They account for less than 0.5% of all the masses found in the mediastinum (1, 2). Over 90% of these tumors are cavernous or capillary hemangiomas. Venous hemangiomas in the mediastinum are extremely rare (1, 2). The CT findings of hemangiomas that have been reported in the world literature are well-marginated solid masses in the mediastinum with a central collection of contrast material or there is heterogeneous enhancement (3-5). Abe et al reported on a venous hemangioma that was seen as a solid mass with poor enhancement on the CT scan, which are the same findings as the other types of hemangiomas (6). There have been no prior reports of hemangiomas presenting as a cystic mediastinal mass on CT. We report here on a surgically proven venous hemangioma in the middle mediastinum, which presented as a unilocular cystic mass with hemorrhage on the CT scan.