MRI Brain; Ax T2W (left), and Ax PD (right): Hyperintense signal within the
posterior fossa behind the cerebellum, which spans across the midline.
At the midline there is a low signal falx cerebelli and bridging vein.
MRI Brain; Sag T1W (left top and bottom), and Ax T1W Post-Gd (right):
Hypointense signal in the retrocerebellar region without evidence of enhancement.
Key words: mri congenital developmental normal variant
Giant cisterna magna