Case #19

CT

• Ill-defined mass in the right cerebellar hemisphere with crowding of the fourth ventricle

MRI

• Infiltrative T2/FLAIR hyperintense mass in the right cerebellar hemisphere and extending into the fourth ventricle and right foramen of Luschka
• Corresponding patchy enhancement
• Faint areas of internal restricted diffusion
• Associated mass effect on the fourth ventricle with mild prominence of the lateral ventricles for patient age but no ballooning of the temporal horns or third ventricle