Fig. 2
Patient 2. Chest computed tomography showing progressive interstitial pneumonia on day 17 (a) and day 28 (b) with dense and partly consolidated infiltrates, fine reticular pattern and no honeycombing. Dramatic improvement in the chest computed tomography scan on day 71 (c). There was a close temporal association of the initiation of therapeutic plasma exchange on day 24 (blue arrow), and the infusion of cyclophosphamide (red arrow) and rituximab (violet arrow) on day 28 and 42 with recovery of oxygenation index (closed squares) (d)