Pulmonary Complication of Novel Influenza A (H1N1) Infection: Imaging Features in Two Patients

Novel influenza A (H1N1) virus is the pathogen of recent global outbreaks of febrile respiratory infection. We herein report the imaging findings of pulmonary complication in two patients with novel influenza A (H1N1) infection. The first patient without secondary infection showed the ill-defined ground-glass opacity nodules and patch areas of ground-glass opacities. The second patient with sec-ondary pneumococcal pneumonia showed areas of lobar consolidation in the right middle lobe and left lower lobe and ground-glass opacities. rom April 2009, outbreaks of novel influenza A (H1N1) virus occurred world-widely. It has some characteristics that may be differentiated from the seasonal influenza virus, such as involving younger patient. Clinical outcomes of this pathogen are reported as ranging from self-limited illness to respira-tory failure or death (1-3). Although the chest radiographic findings of the novel influenza A (H1N1) pneumonia were described in a clinical report (2), the CT findings have not yet been described. Therefore, we report our experiences of two cases of novel influenza A (H1N1) pneumonia with chest CT findings