A-B, T2-weighed imaging at initial presentation: (A) Hyperintense signal in the bilateral cerebellar hemispheres; (B) Hyperintensity noted in the bilateral thalamus and bioccipital subcortex; C-F, T2-weighted imaging and T1-weighted imaging with gadolinium enhancement immediately before brain biopsy; (C) Hyperintense lesions noted in the pons and the left side of the cerebellum; (D) Progression of the lesion of the thalamus on the right; (E) Ring-enhancing lesion of the cerebellum; (F) Ring-enhancing lesion of the thalamus.