Figure 5c. Medulloblastoma in a 6-year-old girl with a 10-day history of nausea and vomiting. (a) Axial CT image shows a heterogeneous hyperattenuated mass in the right cerebellar hemisphere. (b) On an axial T1-weighted MR image, the mass has homogeneous hypointensity compared with normal cerebellar signal intensity. (c) On an axial T2-weighted MR image, the mass is heterogeneous with surrounding vasogenic edema. (d) Contrast-enhanced axial T1-weighted MR image shows heterogeneous enhancement of the mass.