Autism spectrum disorder vs Rett syndrome and historical pervasive developmental disorder labels
How to tell Autism spectrum disorder and Rett syndrome and historical pervasive developmental disorder labels apart when a board question makes them look alike.
ASD is social-communication deficit plus restricted/repetitive behavior; Rett is regression with hand stereotypies and MECP2; Asperger/CDD are historical labels.
Side by side
Autism spectrum disorder has early social communication deficits plus restricted, repetitive behaviors, interests, or sensory patterns, with variable language and intellectual ability.
Rett syndrome has normal early development followed by regression, loss of purposeful hand skills, stereotyped hand-wringing, gait problems, and MECP2 mutation; Asperger and childhood disintegrative disorder are historical DSM-IV labels now folded into or separated from ASD framing.
ASD is a neurodevelopmental syndrome defined behaviorally by social-communication differences and restricted/repetitive behavior.
Rett syndrome is an X-linked MECP2-related neurodevelopmental disorder; older pervasive-developmental labels are not separate DSM-5 diagnoses.
Reduced social reciprocity, poor eye contact, delayed joint attention, restricted interests, insistence on sameness, and sensory reactivity support ASD.
Developmental regression after normal early milestones, loss of hand skills, hand-wringing, seizures, breathing irregularities, and MECP2 testing support Rett syndrome.
The trap
Regression can occur in ASD, but classic Rett has loss of purposeful hand skills with hand-wringing and MECP2 association.
The repair move
For developmental stems, separate core ASD criteria from syndromic regression patterns and outdated labels.
Try a free question
CoreA toddler has reduced eye contact, limited joint attention, delayed social reciprocity, intense restricted interests, distress with routine changes, and sensory hypersensitivity. Which diagnosis is most likely?
Show answer and explanation
Answer: A. Autism spectrum disorder. Social-communication deficits plus restricted/repetitive behaviors and sensory reactivity support autism spectrum disorder.
Why the other choices are tempting
- B. Rett syndrome features regression with loss of purposeful hand skills and hand stereotypies.
- C. Childhood disintegrative disorder is a historical label rather than a separate current DSM-5 diagnosis.
- D. ADHD centers on inattention and/or hyperactivity-impulsivity.
- E. Social anxiety disorder is fear of scrutiny, not early restricted/repetitive behavior.
Flashcards
Tap a card to flip it.
What two domains define autism spectrum disorder?
Social communication deficits plus restricted/repetitive behaviors define autism spectrum disorder.
What gene is classically associated with Rett syndrome?
MECP2 mutation is classically associated with Rett syndrome.
Quick answers
What is the fastest way to tell Autism spectrum disorder from Rett syndrome and historical pervasive developmental disorder labels?
ASD is social-communication deficit plus restricted/repetitive behavior; Rett is regression with hand stereotypies and MECP2; Asperger/CDD are historical labels.
What is the key clue for Autism spectrum disorder?
Autism spectrum disorder has early social communication deficits plus restricted, repetitive behaviors, interests, or sensory patterns, with variable language and intellectual ability.
What is the key clue for Rett syndrome and historical pervasive developmental disorder labels?
Rett syndrome has normal early development followed by regression, loss of purposeful hand skills, stereotyped hand-wringing, gait problems, and MECP2 mutation; Asperger and childhood disintegrative disorder are historical DSM-IV labels now folded into or separated from ASD framing.
What is the common trap with Autism spectrum disorder vs Rett syndrome and historical pervasive developmental disorder labels?
Regression can occur in ASD, but classic Rett has loss of purposeful hand skills with hand-wringing and MECP2 association.