Beckwith-Wiedemann Syndrome - GeneReviews® - NCBI Bookshelf
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Last updated 04 abril 2025

Beckwith-Wiedemann syndrome (BWS) is a growth disorder variably characterized by macroglossia, hemihyperplasia, omphalocele, neonatal hypoglycemia, macrosomia, embryonal tumors (e.g., Wilms tumor, hepatoblastoma, neuroblastoma, and rhabdomyosarcoma), visceromegaly, adrenocortical cytomegaly, kidney abnormalities (e.g., medullary dysplasia, nephrocalcinosis, and medullary sponge kidney), and ear creases / posterior helical ear pits. BWS is considered a clinical spectrum, in which affected individuals may have many or only one or two of the characteristic clinical features. Although most individuals with BWS show rapid growth in late fetal development and early childhood, growth rate usually slows by age seven to eight years. Adult heights are typically within the normal range. Hemihyperplasia (also known as lateralized overgrowth) is often appreciated at birth and may become more or less evident over time. Hemihyperplasia may affect segmental regions of the body or selected organs and tissues. Hemihyperplasia may be limited to one side of the body (ipsilateral) or involve opposite sides of the body (contralateral). Macroglossia is generally present at birth and can obstruct breathing or interfere with feeding in infants. Neonatal hypoglycemia occurs in approximately 50% of infants with BWS; most episodes are mild and transient. However, in some cases, persistent hypoglycemia due to hyperinsulinism may require consultation with an endocrinologist for therapeutic intervention. With respect to the increased risk for embryonal tumor development, the risk for Wilms tumor appears to be concentrated in the first seven years of life, whereas the risk for developing hepatoblastoma is concentrated in the first three to four years of life. Cognitive and neurobehavioral development is usually normal. After childhood, prognosis is generally favorable, although some adults experience issues requiring medical management (e.g., for renal or skeletal concerns).

Genome-wide methylation profiling of Beckwith-Wiedemann syndrome
Genetics: Metabolism and Conditions With Distinctive Appearance

Beckwith-Weidemann syndrome with IC2 (KvDMR1) hypomethylation

Beckwith-Wiedemann Syndrome Resources

Beckwith-Wiedemann syndrome: MedlinePlus Genetics

Overgrowth syndromes — clinical and molecular aspects and tumour
APC-Associated Polyposis Conditions - GeneReviews® - NCBI

Beckwith-Wiedemann Syndrome - an overview

Figure 1. [Comprehensive testing strategy to diagnose

Figure 2. [Individuals with characteristic facial features of
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