Study of Biologic Materials From the Mediastinal Lymph Nodes From Patients With Lung Disease.

The purpose of this protocol is to obtain biologic materials from the mediastinal lymph nodes from patients with lung disease and mediastinal lymph node involvement in order to: (1) develop a better understanding of the cause and development of lung disorders involving the mediastinal lymph nodes; (2) identify biologic parameters that help diagnose and predict the behavior of human lung diseases; and (3) identify individuals who will be suitable candidates for other protocols such as those involving investigational new drugs.