Neuroimaging of Natalizumab Complications in Multiple Sclerosis: PML and Other Associated Entities

Figure 5

45-year-old woman with a 10-year history of RRMS was started on natalizumab. She did well for six years and then developed gait abnormality and fatigue. MR imaging demonstrates large lesions in the cerebellar peduncles demonstrating a “crescent” shape.