<prompt> Medusa head appearance on MRI is seen inAV malformationVenous angiomaCavernous hemangiomaVein of galen malformation  <response>: Veins are small at periphery and gradually enlarge as they approach a central draining vein - caput medusa or medua head.serpentine apperance of the curvilinear peripheral draining veins seen in venous malformation venous angioma. 