Table 1.

Lab Studies.

Investigations	Findings
Pleural fluid cytopathology of original aspiration biopsy	No WBCs, malignant cells, fungus or organisms.
Echinococcal Ab EIA	<0.80 (negative)
Pleural fluid for Echinococcus	Sample was erroneously not sent to Quest Diagnostics for analysis by the WMC laboratory
Pleural fluid AFB stain	negative
Pleural fluid analysis	Pale red, blood tinged, 5500 WBC's, 2280 RBC's, 6% PMN, 52% lymphocytes, 12% monocytes, 18% eosinophils, 12% macrophages
Pleural fluid chemical analysis	glucose 40 mg/dL, LDH 255 U/L, cholesterol 68 mg/dL, total protein 4.4 g/dL, triglyceride 16/dL, lactic acid 7.5 mmol/L; pH not performed.