Cervico-mediastinal thymic cyst with vocal cord paralysis.

An unusual case of congenital cervico-mediastinal thymic cyst with vocal cord paralysis is presented together with a brief history and classification of these cysts. A discussion of thymic cyst symptomatology and the surgical approach to these lesions is included. Simple thymic cysts should be considered in the differential diagnosis of cervico-mediastinal masses, particularly in children and young adults.