Dermoid cyst of the mediastinum communicating with a bronchus; report of two cases.

Benign tumors of the mediastinum may on occasion reach massive proportions. Previous reports on mediastinal tumors made by Clagett and others include a fibroma weighing over 4000 gm successfully removed, and a lipoma (autopsy specimen) of 12,000 gm. Ganglioneuroma of the mediastinum is a rare lesion and is almost always posterior in origin. Three of 71 cases reviewed by Kent and Blades were in the anterior mediastinum.