Match each pediatric clinical vignette with the most likely neurodevelopmental diagnosis.

A 7-year-old boy with a 1-year history of excessive fidgeting, blurting out answers in class, and difficulty waiting his turn across both home and school settings.Attention-Deficit/Hyperactivity Disorder (ADHD)
A 4-year-old boy presenting with poor eye contact, delayed speech, repetitive stacking of blocks, and severe distress during routine transitions.Autism Spectrum Disorder (ASD)
A 9-year-old boy with a 2-year history of recurrent facial grimacing, shoulder shrugging, and occasional involuntary throat clearing.Tourette Syndrome
A 3-year-old girl who developed normally until 15 months of age, now presenting with loss of expressive language, repetitive hand-wringing movements, and ataxia.Rett Syndrome

Answer

The correct matches align the pathognomonic behavioral and developmental features with their respective neurodevelopmental disorders.

Each vignette provides classic diagnostic criteria for the most common neurodevelopmental disorders tested on the USMLE. Recognizing these classic patterns is essential for rapid and accurate diagnosis.

Step-by-Step Solution

Analyze each vignette for core developmental, behavioral, or motor abnormalities.

Identified hyperactivity (left_1), social/communication deficits (left_2), motor/vocal tics (left_3), and developmental regression in a female (left_4).

Identifying the primary symptom cluster narrows down the differential diagnosis in pediatric psychiatry.

Correlate identified symptom clusters with DSM-5 criteria.

Matched hyperactivity to ADHD, social deficits/repetitive behaviors to ASD, chronic tics to Tourette syndrome, and female regression with hand-wringing to Rett syndrome.

Direct application of diagnostic criteria ensures accurate diagnosis.

Key Concept

Clinical presentation of core childhood neurodevelopmental disorders

Estimated Time:1m 0s

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Step-by-Step Solution

Key Concept

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