Figure 7c. Pilocytic astrocytoma with ringlike enhancement. (a) Axial T1-weighted image shows a hypointense mass (m) of the left cerebellar hemisphere. (b) Axial T2-weighted image reveals hyperintensity with numerous hypointense septations within most of the mass. (c) Contrast-enhanced axial T1-weighted image demonstrates ringlike enhancement of multiple cystic areas within the tumor.