Smith-Magneis syndrome: behavioural phenotype mimics ADHD

Area of Science:

• Neurodevelopmental disorders
• Genetics
• Behavioral phenotyping

Background:

• Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental disorder characterized by inattention and hyperactivity.
• Accurate diagnosis is crucial for effective management and intervention.

Observation:

• A 7-year-old male with intellectual disability presented with symptoms suggestive of ADHD.
• Specific facial dysmorphic features were noted during clinical evaluation.

Findings:

• Differential diagnosis considered ADHD, but further investigation was warranted.
• Genetic testing confirmed Smith-Magenis syndrome.
• The behavioral phenotype of Smith-Magenis syndrome closely resembles ADHD.

Implications:

• This case underscores the importance of comprehensive evaluation beyond presenting symptoms.
• Recognizing subtle phenotypic clues can aid in diagnosing rare genetic syndromes.
• Distinguishing Smith-Magenis syndrome from ADHD is vital for appropriate treatment strategies.