Eosinophilic Pleural Effusion: A Rare Manifestation of Hypereosinophilic Syndrome

Table 1

Pleural fluid (PF) analysis at monthly intervals. This shows that the eosinophilia in pleural fluid persisted for months despite therapy.

	PF analysis 1	PF analysis 2	PF analysis 3
	(Day 3)	(Day 30)	(Day 64)
pH	7.53	—	—
Lipase U/L	—	<10	10
LDH U/L	94	79	458
Protein g/dL	4.88	4.61	<1.0
Glucose mg/dL	96	—	37
Amylase U/L	<10	—	<10
Nucleated cell count	1530	580	1300
Red blood cells	450	625	12640
Neutrophils	21	26	76
Mononuclear	54	41	17
Mesothelial	25	33	7
Abnormal cells	0	0	0
Culture	Negative	Negative	Staph. aureus
Cytology	25%–30% eosinophils	25% eosinophils	Primarily eosinophils
	No neoplastic cells	No neoplastic cells	No neoplastic cells

LDH: Lactate dehydrogenase.