An Eosinophilic Pneumonia Mimicking Lung Cancer on Multiple Imaging Modalities Monitored By CT

Abstract

Eosinophilic pneumonia (EP) is a rare interstitial lung disease often mimicking other pulmonary conditions. We present the case of a 43-year-old male evaluated for suspected lung cancer due to progressive dyspnea, weight loss, cough. Cytological analysis confirmed an interstitial pulmonary inflammatory process with significant eosinophilic granulocyte infiltration, with no evidence of malignancy. Complete clinical and radiological resolution was achieved within two weeks following corticosteroid and empiric antibiotic therapy. This case highlights the challenging differential diagnosis of EP, especially when mimicking malignancy, emphasizing the crucial role of a complete clinical evaluation based on a multimodality imaging diagnostic assessment and prompt response to corticosteroids for diagnosis confirmation.