Overgrowth disorder with increased risk of childhood cancer.Encyclopedia Entry for Beckwith-Wiedemann Syndrome :Beckwith-Wiedemann 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.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: Blood tests for low blood sugar Chromosomal studies for abnormalities in chromosome 11 Ultrasound of the abdomen.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 breathe 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.Children with Beckwith-Wiedemann syndrome typically lead normal lives. Further study is needed to develop long-term follow-up information.These complications can occur: Development of tumors Feeding problems due to enlarged tongue Breathing problems due to enlarged tongue Scoliosis due to hemihypertrophy.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.Beckwith-Wiedemann syndrome Beckwith-Wiedemann syndrome.Devaskar SU, Garg M. Disorders of carbohydrate metabolism in the neonate.