[Acute eosinophilic pneumonia presented with hemoptysis as the first manifestation]

We reported a case of 38-year-old man who was admitted with a 10-day history of hemoptysis. He had reported a significant increasing in tobacco consumption in the week prior to admission. Chest computed tomographic (CT) scans showed multiple ground-glass opacities in bilateral lung fields. The percentage of eosinophils in the bronchoalveolar lavage fluid was over 25%. Based on the patient's imaging findings and the predominant eosinophilia in the bronchoalveolar lavage, a diagnosis of acute eosinophilic pneumonia was made. Systemic corticosteroid therapy was initiated. Repeated CT scan showed the opacities were completely resolved afterwards. Compared with the previous case reports published in Pubmed, which included 234 patients with AEP, the present case described hemoptysis as the only manifestation in an AEP patient, indicating the diversity of clinical manifestations of AEP. Clinicians should consider the probability of AEP in patients with hemoptysis and pulmonary ground-glass opacities after acute tobacco exposure if the disease cannot be explained by other causes.