Syringomyelia in infants secondary to mobile congenital atlantoaxial dislocation.

We report a characteristic pattern of 'waist-like' syringomyelia observed in three infants having mobile and reducible congenital atlantoaxial dislocation. The syringomyelia in at least two of these cases was diagnosed to be an intramedullary tumor. Following atlantoaxial fixation, all three patients had long-term recovery of their symptoms. Copyright (c) 2007 S. Karger AG, Basel.