Mediastinum is group of some structures in the chest. It is also called mediastinal tumor, thymoma or lymphoma. These tumors are present in the mediastinum area which contains heart, thymus, trachea, large blood vessels and connective tissues. These tumors are usually cancerous. These tumors can spread to the surrounding areas. Prognosis depends upon type of tumor. These tumors respond to chemotherapy and radiotherapy.
