Fig. 1

1. Pneumonia due to human metapneumovirus. Pneumonia due to HMPV in 3-year-old children who presented with fever, cough, and blood-stained sputum. (A) Axial high-resolution (0.625-mm collimation) chest CT images showed a segmental consolidation in the right upper lobe. The air bronchogram was well delineated within the consolidation. (B) Lung window image showed patchy centrilobular nodules around the segmental consolidation. In addition, bronchial wall thickening was seen in the right lower lobe. (C) Bronchoscopy showed a partially occluded lumen in segmental bronchi. (D) Anteroposterior chest radiograph showed disappeared air-space consolidations after 1 week of treatment. 2. Pneumonia due to HMPV in 4-year-old children who presented with fever and cough. (A) Coronally reconstructed CT image demonstrates lobar consolidation in the left lower lobe. (B) Axial high-resolution (1.25-mm collimation) chest CT images shows patchy GGO, centrilobular nodules and lobar consolidation. (C) Bronchoscopy showed the sputum plugs in the bronchial cavity of the lower left and the posterior branch. (D) Anteroposterior chest radiograph showed disappeared air-space consolidations after 1 week of treatment. 3. Pneumonia due to HMPV in 4-year-old children who presented with fever and cough. A and B) Axial high-resolution (1.25-mm collimation) chest CT images show patchy GGO, centrilobular nodules around the segmental consolidation. C) Bronchoscopy showed mucosa erosion and white viscous secretions in the left lower posterior basal branch. D) HRCT showed disappeared consolidations after 9 days of treatment