Correct!
3. Lung eosinophilia (bronchoalveolar lavage differential cell count > 25% eosinophils or predominance of eosinophils on open lung biopsy) is typical
Lung eosinophilia is characteristic of acute eosinophilic pneumonia, whereas peripheral blood eosinophilia is often lacking in these patients. Unlike chronic eosinophilic pneumonia, patients with acute eosinophilic pneumonia typically do not have a prior history of asthma, and usually do not suffer relapses from the disease following corticosteroid therapy. The imaging findings of acute eosinophilic pneumonia include rapidly progressive bilateral pulmonary opacities largely indistinguishable from the numerous other causes of acute lung injury or ARDS. The peripheral / subpleural opacities characteristic of chronic eosinophilic pneumonia are generally not a feature of acute eosinophilic pneumonia.
References