The condition is also called mucopolysaccharidosis type III (MPS III). Kids who have the condition are born with it. But most won't have symptoms until the preschool years, when they're between 2 and ...

Snugburys director Cleo Spencer explained that a family friend had a son with mucopolysaccharidosis type III (MPS 3A) which is also referred to as Sanfilippo syndrome or childhood dementia.