Magnetic resonance imaging at 5 years, 4 months. a T2-weighted image shows increase in abnormal signals in the frontal lobe and volume loss in bilateral white matter and deep gray matter. b T2-weighted image demonstrates an increase in abnormal signals in the medulla oblongata. c Fluid attenuated inversion recovery image shows swelling and high intensity from the medulla oblongata to the top of the cervical spine. d, e Mild elevation in apparent diffusion coefficient values are recognized in affected areas.