Table 1. The mean ADA values in the different diagnostic category.

Cases	Mean ADA (U/L) ±SD
Malignancy* (N = 26)	12.9±13.1
Congestive heart failure (N = 12)	7.16±6.2
Streptococcus pneumoniae effusion (N = 1)	11
Klebsiella pneumoniae empyema (N = 1)	200
Total TB pleuritis (N = 197)	71.2±39.6

SD = standard deviation;

^*Kaposi sarcoma is the only malignancy with ADA of 73 above the cut-off.