• Dynamic Cerebellar Tonsils in Chiari Malformation

    2 days ago - By The Journal of Pediatrics

    A 5-year-old asymptomatic boy had apparent optic nerve head elevation on routine ophthalmology examination. Magnetic resonance imaging of the brain revealed a previously undiagnosed Chiari I malformation with crowding of the foramen magnum and low-lying cerebellar tonsils. Cine phase sagittal MR imaging showed altered cerebrospinal fluid egress through the foramen magnum. It also demonstrated dynamic motion of the cerebellar tonsils that correlated with the cardiac cycle.
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