Your lung cancer has caused fluid to build up in the space around your lung. This fluid is called a malignant pleural effusion. This fluid takes up space in your chest, and prevents your lung from fully filling with air. As a result, you may be experiencing shortness of breath, cough, or chest discomfort. Your doctors have determined that you would feel better if a surgeon or pulmonary specialist removed this fluid immediately. Your doctors are offering to admit you to the hospital, and drain the fluid using a Pleur-XTM catheter.