ABSTRACT
The eosinophilic lung diseases and syndromes are characterized by prominent
infiltration of the lung by polymorphonuclear eosinophils, often associated with
marked peripheral blood eosinophilia and eosinophilia at bronchoalveolar lavage
(BAL), and may include parenchymal lung diseases as well as diseases of the
lower airways (1). The diseases associated with eosinophilic pneumonia devel-
oped in this chapter may be separated into eosinophilic pneumonia of unde-
termined origin and well-individualized syndromes, and eosinophilic pneumonia
with a definite cause (mainly infection and drug reaction) (Table 1).
