childhood disintegrative disorder(redirected from Dementia infantilis)
Also found in: Medical, Wikipedia.
childhood disintegrative disorder[¦chīld‚hu̇d dis′in·tə‚grād·iv dis‚ȯrd·ər]
A condition occurring in 3- and 4-year-old children that is characterized by unequivocally normal development in the first several years of life, followed by a marked developmental regression (a child who previously had been speaking in sentences becomes totally mute), and various autistic features develop. Also known as Heller's syndrome.