The Mediastinum is a portion of the thoracic cavity which that contains the Heart, Thymus gland, and portions of the Trachea and Esophagus.
Mediastinal tumors are rare. In which area of the Mediastinum the tumors will develop often depends on the age of the patient.
In most mediastinal tumors, there are no symptoms. The tumors go undiagnosed until the need for a chest X-ray.