Figure 1: Chest X-ray images and changes of inflammatory biomarkers and PaO2/FiO2 in a 61-year-old female patient with COVID-19. A: Chest X-ray on the first hospitalized day shows bilateral diffuse infiltrates. B: Chest X-ray on the sixth hospitalized day shows right pneumothorax with visceral pleura (red arrows) and the endotracheal tube (red asterisk). C: Chest X-ray on the eleventh hospitalized day shows lessened the improvement parenchymal infiltration (black asterisks). D: Chest X-ray on the fifteenth hospitalized day after stopping corticosteroid shows the progression of parenchymal infiltration (black asterisks). E: Chest X-ray on the twentieth hospitalized day shows abated parenchymal infiltration again upon resumption of corticosteroid therapy (black asterisks). F: Changes of inflammatory biomarkers and PaO2/FiO2. CRP: C-reactive protein; IL-6: interleukin-6; NLR: neutrophil to lymphocyte ratio; PaO2/FiO2: partial pressure of oxygen/fraction of inspired oxygen; D1, D6, D11, D15, and D20: the first, sixth, eleventh, fifteenth, and twentieth hospitalized day, respectively.