Figure 1: Chest x-ray of patient 1. (a) At the onset of methotrexate-induced pneumonitis showing patchy consolidates in bilateral upper and middle lobe. (b) After 3 months of treatment showing resolution of lung opacities. (c–f) HRCT chest showing patchy peribronchial opacities with bronchial thickening in left upper lobe and both lower lobes (arrowhead). Patchy areas of air trapping seen in the left upper, bilateral middle, and lower lobe (arrow) suggestive of bronchiolitis obliterans with organising pneumonia (BOOP)