Prader-Willi syndrome is a disease that is present from birth (congenital). It affects many parts of the body. People with this condition feel hungry all the time and become obese. They also have poor muscle tone, reduced mental ability, and underdeveloped sex organs.
Prader-Willi syndrome is caused by a missing gene on chromosome 15. Normally, parents each pass down a copy of this chromosome. The syndrome can occur in a couple of ways:
These genetic changes occur randomly. People who have this syndrome usually do not have a family history of the condition.
Signs of Prader-Willi syndrome may be seen at birth.
Other symptoms may include:
Children have an intense craving for food. They will do almost anything to get food, including hoarding. This can result in rapid weight gain and morbid obesity. Morbid obesity may lead to:
Genetic testing is available to test children for Prader-Willi syndrome.
As the child grows older, lab tests may show signs of morbid obesity, such as:
Children with this syndrome may not respond to luteinizing hormone-releasing factor. This is a sign that their sex organs are not producing hormones. There also may be signs of right-sided heart failure and knee and hip problems.
Obesity is the greatest threat to health. Limiting calories will control weight gain. It is also important to control your child's environment to prevent access to food. Your child's family, neighbors, and school must work together, because your child will try to get food wherever possible. Exercise can help a child with Prader-Willi syndrome gain muscle.
Growth hormone is used to treat Prader-Willi syndrome. It can help:
Taking growth hormone therapy may lead to sleep apnea. A child who takes hormone therapy needs to be monitored for sleep apnea.
Low levels of sex hormones may be corrected at puberty with hormone replacement.
Mental health and behavioral counseling are also important. This can help with common problems such as skin picking and compulsive behaviors. Sometimes, medicine to treat mental health conditions may be needed.
The following organizations can provide resources and support:
The child will need the right education for their IQ level. The child will also need speech, physical, and occupational therapy as early as possible. Controlling weight will allow for a much more comfortable and healthy life.
Complications of Prader-Willi can include:
Contact your health care provider if your child has symptoms of this condition. The disorder is frequently suspected at birth.
Cooke DW, DiVall SA, Radovick S. Normal and aberrant growth in children. In: Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. Williams Textbook of Endocrinology. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 25.
Escobar O, Gurunca N, Viswanathan P, Witchel SF. Pediatric endocrinology. In: Zitelli BJ, McIntire SC, Nowalk AJ, Garrison J, eds. Zitelli and Davis' Atlas of Pediatric Physical Diagnosis. 7th ed. Philadelphia, PA: Elsevier; 2023:chap 9.
Kumar V, Abbas AK, Aster JC, Deyrup AT, Das A. Genetic and pediatric diseases. In: Kumar V, Abbas AK, Aster JC, Deyrup AT, Das A, eds. Robbins and Kumar Basic Pathology. 11th ed. Philadelphia, PA: Elsevier; 2023:chap 4.
BACK TO TOPReview Date: 4/17/2024
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
Health Content Provider
06/01/2025
|
A.D.A.M., Inc. is accredited by URAC, for Health Content Provider (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics. This site complied with the HONcode standard for trustworthy health information from 1995 to 2022, after which HON (Health On the Net, a not-for-profit organization that promoted transparent and reliable health information online) was discontinued. |
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2024 A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.