Variable phenotype in Greig cephalopolysyndactyly syndrome: clinical and radiological findings in 4 independent families and 3 sporadic cases with identified GLI3 mutations
- PMID: 12794692
- DOI: 10.1002/ajmg.a.20018
Variable phenotype in Greig cephalopolysyndactyly syndrome: clinical and radiological findings in 4 independent families and 3 sporadic cases with identified GLI3 mutations
Abstract
Greig cephalopolysyndactyly (GCPS) (OMIM 175700) is an autosomal dominant disorder characterized by a distinct combination of craniofacial, hand and foot malformations. In this report, clinical and radiological findings of 12 patients with GCPS derived from 4 independent families and 3 sporadic cases with documented GLI3 mutations are presented with particular emphasis on inter- and intrafamilial variability. In a particularly instructive family in which 9 members of 4 generations could be studied clinically and molecularly, a missense mutation (R625W) is transmitted and shows a partially penetrant pattern. In a branch of the family, the GCPS phenotype skips a generation via a normal female carrier without clinical signs providing evidence that GCPS does not always manifest full penetrance as generally supposed.
Copyright 2003 Wiley-Liss, Inc.
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