Figure 2 Chest X-ray findings of the patientChest radiographs obtained at different time points during hospitalization. On hospital day 3 (A), slightly increased and thickened pulmonary markings with patchy opacities and blurred margins were observed in both lower lung fields. On hospital day 7 (B), a patchy area of increased density with blurred margins was observed in the middle field of the left lung. On hospital day 24 (C), compared with previous findings, patchy opacities in the middle and lower lung fields were partially absorbed. A patchy area of increased density with relatively clear margins was observed in the upper field of the right lung, with local pleural adhesion at the right lung apex. On hospital day 34 (D), pulmonary markings were distinct, with no obvious abnormalities detected.