Figure 10b. Dysplastic cerebellar gangliocytoma in a 16-year-old girl with occipital headaches. (a) Axial T1-weighted MR image shows a mass (arrowheads) within the left cerebellar hemisphere. Alternating hypointense and isointense bands characterize the lesion. (b) Axial T2-weighted MR image shows alternating hyperintense and isointense bands. (c) Contrast-enhanced axial T1-weighted MR image shows no enhancement within the mass.