developmental venous anomaly with asymmetrical basal ganglia calcification: two case reports and review of the literature

developmental venous anomaly (dva) is a common lesion formerly known as venous angioma. dvas drain normal brain parenchyma; however, parenchymal abnormalities surrounding dvas have been reported. unilateral putamen and caudate calcification in the drainage territory of dvas has so far been reported in 7 cases, all with deep venous drainage. we present two additional cases of dvas, one with superficial and the other one with deep venous drainage, associated with basal ganglia calcifications. we emphasize that dvas should be in the differential diagnosis of unilateral basal ganglia calcifications.