Which syndrome with elf-like appearance includes a short broad forehead, prominent cheeks, flat nasal bridge, and unusual music talent, with mild-to-moderate intellectual disability and hypersociability?

• A. Williams syndrome
• B. Velocardiofacial syndrome
• C. Fragile X syndrome
• D. Angelman syndrome

Answer: (A)

Williams syndrome is characterized by an elf-like facial appearance, described here as a short broad forehead with prominent cheeks and a flat nasal bridge, combined with a highly sociable personality and relatively strong language skills despite mild-to-moderate intellectual disability. A notable feature often highlighted is a heightened affinity for music, which can manifest as unusual musical talent or strong musical interest. This profile stems from a microdeletion at 7q11.23 that includes the elastin gene, leading to the distinctive facial gestalt, social disinhibition, and the cognitive profile seen in this syndrome. The other options do not fit this exact combination: Velocardiofacial syndrome can involve cardiac defects and facial differences but typically lacks the pronounced hypersociability and musical strengths; Fragile X often presents with social anxiety and features like an elongated face and large ears; Angelman presents with a happy, excitable demeanor but severe developmental delays and movement/coordination problems.