Developmental venous anomaly with symptomatic thrombosis of the draining vein.

Developmental venous anomalies (DVAs) are generally considered a benign and asymptomatic finding on CT and MR imaging. The authors report 2 cases of spontaneous thrombosis of the draining vein of a DVA depicted on CT and MR imaging. One patient presented with a nonhemorrhagic transient ischemia, which was successfully treated with anticoagulant therapy. The second patient presented with ischemia complicated by hemorrhagic conversion.