What is Prader-Willi Syndrome?
Prader-Willi syndrome is a complex genetic condition that affects many parts of the body. In infancy, this condition is characterized by weak muscle tone (hypotonia), feeding difficulties, poor growth, and delayed development. Beginning in childhood, the metabolism of individuals with Prader-Willi syndrome changes, and there is a reduced calorie need. Many individuals will develop an insatiable appetite and chronic overeating (hyperphagia). As a result, without dietary modifications, rapid weight gain occurs, leading to obesity. People with Prader-Willi syndrome typically have learning disabilities and behavioral problems. Prader-Willi syndrome affects an estimated one in 10,000 to 25,000 people.*
Rady Children's Prader-Willi Syndrome Clinic
The Prader-Willi Clinic is a multidisciplinary clinic which manages medical, nutritional, developmental and behavioral needs of children with Prader-Willi syndrome. Children who come to the clinic are seen by a clinical geneticist, pediatric endocrinologist, nutritionist and social worker.
The Clinic is held on the 3rd Tuesday morning of each month (for children with a confirmed diagnosis). You can make an appointments by calling 858-966-5840.
Children without a confirmed diagnosis who are suspected of having Prader-Willi syndrome should be evaluated by the Genetics/Dysmorphology Department. For more information or to make an appointment, please call 858-966-5840.
Contact Us:
- Appointments: 858-966-5840 for children with a confirmed diagnosis.
- Genetics Services: 858-966-5840





