CT image at 1 year. Non-contrast CT demonstrated macrocephaly with elevated biparietal index and dilatated lateral ventricles (B). CT angiography shows significant enlargement of the aneurysmal dilatated vein of Galen compared to previous MRI, feeders coming from the posterior and middle choroidal arteries draining into it, dilatated torcula (white star) and significantly narrowed proximal part of the straight sinus (white arrows) distal to Galen (A, C).