Phenotype in patients with intellectual disability and pathological results in array CGH

Area of Science:

• Genetics
• Paediatric Neurology

Background:

• Global developmental delay (GDD) and intellectual disability (ID) are common in pediatric neurology.
• Array comparative genomic hybridisation (array-CGH) is a key diagnostic tool for these conditions.

Purpose of the Study:

• To identify phenotypic features associated with positive array-CGH results in patients with unexplained ID.

Main Methods:

• A blind study analyzed epidemiological, clinical, anthropometric, and morphological data from 80 patients with unexplained ID.
• Association between specific features and array-CGH results was evaluated.

Main Results:

• Pathological array-CGH results were observed in 27.5% of patients.
• Significant associations with positive array-CGH results included family history of GDD/ID (OR=12.1), congenital malformations (OR=5.33), more than 3 facial dysmorphic features (OR=20.9), and hypotonia (OR=3.25).

Conclusions:

• The likelihood of pathological array-CGH results in ID/GDD patients increases with specific clinical indicators.
• Findings align with existing literature, reinforcing the diagnostic utility of array-CGH in identifying genetic causes of ID/GDD.