A _________ is a collection of fluid (pleural fluid, blood, pus) within the pleural cavity. What are the causes of this condition?
1) Pulmonary infection
2) Congestive heart failure
3) Systemic lupus erythematosus or rheumatoid arthritis
4) Pancreatitis
5) Trauma
6) Pulmonary embolism
7) Renal disease
8) Cirrhosis
9) Malignancy
10) Postpericardiotomy syndrome