Fig. 2

Rituximab-associated changes in the thrombi in both pulmonary arteries and the left common femoral vein thrombus on contrast-enhanced computer tomography (CT). Contrast-enhanced CT images before rituximab initiation (a), immediately after the first course of rituximab (500 mg/week for 4 weeks, repeated 6-monthly) (b), and at 3 months (c), 1 year (d), and 2 years 2 months (e) after the start of rituximab. The thrombi observed before rituximab initiation immediately started to improve with rituximab therapy. Open circles, thrombus present; open squares, thrombus has disappeared