Childhood Disintegrative Disorder (CDD)
CDD is an extremely rare disorder with very specific signs of regression in physical functioning such as motor skills or control over bladder and bowel movement. Regression in social and language skills can also be apparent. These regressions will not appear before the age of two. By definition, this disorder can only be diagnosed if those symptoms are preceded by at least two years of normal development. The regression must be prior to age ten.