Paracardiac pleural Castleman disease: radiographic and MR findings.

Castleman disease is a rare benign lymphoid tumour of uncertain aetiology that usually appears as a solitary mediastinal mass. We report a rare case of Castleman disease in the right paracardiac pleural space, occurring in a young woman with non-specific chest discomfort. MRI showed a well-defined, oval mass that was slightly hyperintense on T(1) weighted images, inhomogeneously hyperintense on T(2) and enhanced T(1) weighted images. The patient underwent radical tumour resection and has remained well for 8 years.