Wiedemann-Beckwith syndrome in apparently discordant monozygotic twins

A. H. Olney, B. A. Buehler, M. Waziri

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


We report 3 pairs of monozygotic (MZ) twins, one twin showing typical Wiedemann-Beckwith syndrome (WBS) with minimal or no expression of the condition in the co-twin. These cases are documented, and three previously reported MZ twin pairs are reviewed. Phenotypic concordance for this syndrome in MZ twin pairs has not been reported. Many cases of familial occurrence have been published and different modes of inheritance have been postulated. Based on the twin-twin variability seen in our patients, it seems the most likely mechanism of inheritance is an autosomal dominant mutation with environmental modification of expressivity, or reduced phenotrance.

Original languageEnglish (US)
Pages (from-to)491-499
Number of pages9
JournalAmerican journal of medical genetics
Issue number3
StatePublished - 1988

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)


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