Williams Syndrome is a genetic disorder characterized by mild to moderate intellectual disability, facial dysmorphia, hypercalcemia, and cardiac defects. Individuals have an outgoing personality, and interact readily with strangers.
The most common psychiatric disorders found in Williams syndrome have been reported mainly in children and include Attention-Deficit/Hyperactivity Disorder (ADHD) in 65%, Specific Phobia in 43%, and Generalized Anxiety Disorder (GAD) in up to 24% of cases.[1][2][3]
The syndrome is caused by a chromosome 7q11.2 deletion.