CHIARI-I MALFORMATION AND SPINAL-CORD INJURY - CAUSE FOR CONCERN IN CONTACT ATHLETES

We present a case of transient quadriparesis in an 8-yr-old football p layer with a normal cervical spine canal but Chiari I malformation of the hindbrain. Chiari I consists of herniation of the cerebeller tonsi ls through the foramen magnum, which reduces space available for the s pinal cord. Magnetic resonance imaging (MRI) of the brain or cervical spine can identify asymptomatic Chiari I, whereas previously myelograp hy was necessary. The incidence and natural history of Chiari I malfor mation is reviewed, with special reference to the question of return-t o-play in young athletes.