[An adult case of mediastinal lymphangioma]

Mediastinal lymphangioma is rare (less than 1%) and is usually not discovered until adulthood because of its asymptomatic nature and deeply seated location. We experienced an adult case of mediastinal lymphangioma. CT and MRI showed a non-invasive multilocular cystic mass spreading in the potential space of the mediastinum including the precardiovascular region and central region. To determine the extent of the tumor, the concept of the potential space of the mediastinum was useful in making the differential diagnosis of cystic mediastinal tumor.