Question 6

6.  Your patient is a 54 year old that just underwent a thoracocentesis.  His results are as follows:  serum protein < 0.5,  LDH 100 IU/mL, specific gravity of < 1.016, ratio of pleural fluid LDH to serum LDH of < 0.6, and pleural fluid protein of 2 gram/dL.  Which of the following is the most likely diagnosis?


A.  Infection
B.  Pulmonary Embolism
C.  CHF
D.  Infarction