Fig. 3
Patient 3. Chest computed tomography showing interstitial pneumonia on day 2 (a), day 15 (b). Immunosuppression with cyclophosphamide (red arrow) was initiated on day 43, causing impressive clinical improvement. A control chest computed tomography was performed after 15 months (c). There was a close temporal association of the initiation of cyclophosphamide (red arrow) on day 43 with recovery of oxygenation index (d)