Fig. 1

Chest CT and chest X-ray in the clinical course of the patient: A CT on the 4^th day of fever showed multiple small patchy hyperdense shadows in both lungs with poorly defined borders, mainly in the lower lobes of both lungs. B CT on the 16^th day of fever showed the appearance of interstitial thickening with grid-like changes and ground glass opacities in both lungs. C A chest X-ray showed large dense shadows in both the middle and lower lung (7^th day of fever). D A chest X-ray showed the increase of large dense shadows of pulmonary infiltrates (9^th day of fever). E A chest X-ray showed an increase in grid-like changes and corn-like high-density shadows in both lungs with unclear borders (11^th day of fever). F A chest X-ray showed no change in grid-like changes and corn-like high-density shadows