Fig. 3

Chest radiographic images before and at the presentation of acute respiratory failure. Chest postero-anterior radiography taken about one month after initiating rituximab therapy shows no clear haziness or infiltration in both lung fields (a). At the presentation of acute respiratory failure with altered mentality (in the sixth week after starting rituximab) there was diffuse bilateral infiltration in both lung fields with relative sparing of both lower lung fields (b). Axial high-resolution computed tomography images show diffuse ground glass opacity in both upper lungs with consolidation in dependent areas (c); The lung base is relatively spared (d)