Concurrent development of a thymic cyst and mediastinal Hodgkin's disease.

A case is presented of a young adult female who presented with nodular sclerosing Hodgkin's disease and a mediastinal mass that proved to be a thymic cyst. Prior to this illness, a chest x-ray had been obtained that did not show a mediastinal mass. This case illustrates that thymic cysts may arise simultaneously with mediastinal Hodgkin's disease, rather than as a result of treatment or being present congenitally.