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Beckwith-Wiedemann syndrome


Beckwith-Wiedemann syndrome is a growth disorder that causes large body size, large organs, and other symptoms. It is a congenital condition, which means it is present at birth. The signs and symptoms of the disorder vary somewhat from child to child.

Infancy can be a critical period in babies with this condition because of the possibility of:

  • Low blood sugar
  • A type of hernia called an omphalocele (when present)
  • An enlarged tongue (macroglossia)
  • An increased rate of tumor growth. Wilms tumors and hepatoblastomas are the most common tumors in children with this syndrome.


Beckwith-Wiedemann syndrome is caused by a defect in the genes on chromosome 11. About 10% of cases can be passed down through families.


Signs and symptoms of Beckwith-Wiedemann syndrome include:

  • Large size for a newborn
  • Red birth mark on forehead or eyelids (Nevus flammeus)
  • Creases in ear lobes
  • Large tongue (macroglossia)
  • Low blood sugar
  • Abdominal wall defect (umbilical hernia or omphalocele)
  • Enlargement of some organs
  • Overgrowth of one side of the body (hemihyperplasia/hemihypertrophy)
  • Tumor growth, such as Wilms tumors and hepatoblastomas

Exams and Tests

The health care provider will do a physical exam to look for signs and symptoms of Beckwith-Wiedemann syndrome. Often this is enough to make a diagnosis.

Tests for the disorder include:


Infants with low blood sugar may be treated with fluids given through a vein (intravenous, IV). Some infants may need medicine or other management if low blood sugar continues.

Defects in the abdominal wall may need to be repaired. If the enlarged tongue makes it hard to breath or eat, surgery may be needed, Children with overgrowth on one side of the body should be watched for a curved spine (scoliosis). The child also must be watched closely for the development of tumors. Tumor screening includes blood tests and abdominal ultrasounds.

Outlook (Prognosis)

Children with Beckwith-Wiedemann syndrome typically lead normal lives. Further study is needed to develop long-term follow-up information.

Possible Complications

These complications can occur:

  • Development of tumors
  • Feeding problems due to enlarged tongue
  • Breathing problems due to enlarged tongue
  • Scoliosis due to hemihypertrophy

When to Contact a Medical Professional

If you have a child with Beckwith-Wiedemann syndrome and worrisome symptoms develop, call your pediatrician right away.


There is no known prevention for Beckwith-Wiedemann syndrome. Genetic counseling may be of value for families who would like to have more children.


Jones KL, Jones M, Del Campo M, eds. Smith's Recognizable Patterns of Human Malformation. 7th ed. Elsevier Saunders; Philadelphia, PA; 2015:218-22.

Stevenson RE, Hall JG, Everman DB, Soloman BS, eds. Human Malformations and Related Anomalies. 3rd Edition. Oxford University Press. New York, NY, 2015:888-91.

Review Date:4/21/2015
Reviewed By:Jennifer M. Kalish, MD, PhD, Attending Physician, Division of Human Genetics, The Children’s Hospital of Philadelphia and the Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team. Editorial update 03-17-16.

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