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The pervasive developmental disorders were: [4] Pervasive developmental disorder not otherwise specified (PDD-NOS), which includes atypical autism, and is the most common (47% of autism diagnoses); [10] Typical autism, the best-known; Asperger syndrome (9% of autism diagnoses); Rett syndrome; and; Childhood disintegrative disorder (CDD).
A high-functioning group (around 25 percent) whose symptoms more or less overlap with that of what was Asperger syndrome, while also not meeting the then current criteria for autism spectrum disorder, but who completely differ from those with Asperger syndrome in terms of having a lag in language development and/or mild cognitive impairment ...
Childhood disintegrative disorder (CDD), also known as Heller syndrome and disintegrative psychosis, is a rare condition characterized by late onset of developmental delays—or severe and sudden reversals—in language (receptive and expressive), social engagement, bowel and bladder, play and motor skills.
Developmental disability is a diverse group of chronic conditions, comprising mental or physical impairments that arise before adulthood. Developmental disabilities cause individuals living with them many difficulties in certain areas of life, especially in "language, mobility, learning, self-help, and independent living". [1]
Treatment often involves promoting better communication and socializing, and reducing behaviors that can be disruptive. Children with pervasive developmental disorders may be placed in special education classes, receive behavior modification training, speech, physical or occupational therapy, or medication.
Pervasive developmental disorder not otherwise specified – (PDD-NOS) was a pervasive developmental disorder, and is also considered an autism spectrum disorder. It was diagnosed when deficits in social interaction and verbal/nonverbal communication or stereotyped, repetitive behaviors and interests were present but criteria was not met for a ...
A 2017 study [8] [9] tested all 20,000 genes in about 4,300 families with children with rare developmental difficulties in the UK and Ireland in order to identify if these difficulties had a genetic cause. They found 14 new developmental disorders caused by spontaneous genetic mutations not found in either parent (such as a fault in the CDK13 ...
The syndrome can be difficult to diagnose and may be misdiagnosed as autism, pervasive developmental disorder, hearing impairment, learning disability, auditory processing disorder, attention deficit hyperactivity disorder (ADHD), intellectual disability, childhood schizophrenia, or emotional/behavioral problems. An EEG (electroencephalogram ...