People in their 20s and 30s may lack self-care skills and independence. Common signs and symptoms during this time include:

  • Seizures
  • Acceleration of cognitive decline
  • Sleep disturbance
  • Continued regression of previously mastered skills to the point of loss of ability
  • Gait (walking) disturbance
  • AGU-specific facial features become more apparent for example: widely-spaced eyes, small ears, full lips, large tongue, broad nose