Pediatric Developmental Venous Anomaly

• Etiology: Congenital malformation of veins that drain normal brain
• Imaging:
  — Most commonly in frontoparietal region draining towards frontal horn of lateral ventricle
  — Caput medusae sign of many small veins draining into a single larger collecting vein
  — Look for gliosis or hemosiderin to suggest steal phenomenon or bleeding
• DDX: Arteriovenous malformation, dural arteriovenous fistula
• Complications: Usually incidental finding unless associated with cavernous malformation causing seizures
• Treatment: None if isolated
• Clinical:
  — Most common cerebral vascular malformation
  — Usually an incidental finding of no clinical significance

Radiology Cases of Developmental Venous Anomaly