Medusa head appearance on MRI is seen in
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).
AV malformation
Venous angioma
Cavernous hemangioma
Vein of galen malformation
Venous angioma