NCIt definition : An inflammatory lung disorder characterized by an increased number of eosinophils
in the lungs. The majority of cases are idiopathic, without identifiable cause. In
a minority of cases, medications, fungal infections, and environmental triggers have
been implicated. It manifests as acute or chronic. Acute eosinophilic pneumonia is
a severe and rapidly progressing pneumonia that may lead to respiratory failure requiring
mechanical ventilation. Chronic eosinophilic pneumonia follows a slower course and
manifests as fever, dyspnea, cough, and weight loss.;