Subependymal veins and ventricular tumors.
D002533:Cerebral Angiography; D002551:Cerebral Ventricle Neoplasms / Q000000981:diagnostic imaging*; D002552:Cerebral Ventricles / Q000098:blood supply*; D003392:Cranial Sinuses / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D004806:Ependymoma / Q000000981:diagnostic imaging*; D005909:Glioblastoma / Q000000981:diagnostic imaging*; D005910:Glioma / Q000000981:diagnostic imaging*; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000000981:diagnostic imaging*; D008579:Meningioma / Q000000981:diagnostic imaging*; D010212:Papilloma / Q000000981:diagnostic imaging*