<unk>  or<unk>  is a biopsy done to diagnose and stage cancer in the mediastinum. Approximately 10% of patients need a catheter placed for the evacuation of a pneumothorax. Patients that have this procedure generally have quite a bit of mediastinal involvement.
Transthoracic needle aspiration
Thoracoscopy
Pericardial effusion CT
CT pulmonary angiogram
Right heart catheterization
Pulmonary nodule biopsy
Transesophageal echocardiography 
Pericardial effusion laboratory studies