The girl who won’t grow up

The bizarre medical mystery of a 12-year old girl who literally is stuck as a 9-month old baby:

For 12 years the family has changed her nappies, rocked her to sleep and taken turns to give her cuddles. On school days, she is carried gently into a yellow bus and taken to a special school for handicapped children. Her condition has no name and doctors are unaware of any other child in her situation.