There is a solid right cerebellar mass with small cystic components that suppress on FLAIR, showing predominantly a low signal on T1 and high signal on T2, diffusion restriction and slight foci of enhancement. It causes a prominent mass effect distorting and compressing the 4th ventricle with associated obstructive hydrocephalus. Cerebellar tonsils are low-lying, displaced inferiorly below the foramen magnum.
Spinal cord is unremarkable in appearance.