Table 2. Pleural effusion findings.

Test	Result	Normal range
pH	7.22	7.38-7.42
Lactate (Lac)	5.4 mmol/L	<2.0 mmol/L
Glucose (Glu)	57 mg/dL	70-100 mg/dL
Carcinoembryonic antigen (CEA)	1.3 ng/mL	<3.0 ng/mL
Specific gravity	1.041	<1.015
Cell count	3010 cells/μL	<1000 cells/μL
Neutrophils	40%	<25%
Lymphocytes	37%	>50%
Macrophages	2%	<70%
Eosinophils	21%	<10%
Protein	6.1 g/dL	<3.0 g/dL
Glucose	61 mg/dL	70-100 mg/dL
Lactate dehydrogenase (LDH)	723 U/L	<200 U/L
Adenosine deaminase (ADA)	87.1 U/L	<40 U/L