Greig cephalopolysyndactyly syndrome
- Greig syndrome
- Polysyndactyly with peculiar skull shape
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Different genetic changes involving the GLI3 gene can cause Greig cephalopolysyndactyly syndrome. In some cases, the condition results from a chromosomal abnormality—such as a large deletion or rearrangement of genetic material—in the region of chromosome 7 that contains the GLI3 gene. In other cases, a mutation in the GLI3 gene itself is responsible for the disorder. Each of these genetic changes prevents one copy of the gene in each cell from producing any functional protein. It remains unclear how a reduced amount of this protein disrupts early development and causes the characteristic features of Greig cephalopolysyndactyly syndrome.
- Greig cephalopolysyndactyly syndrome. Genetics Home Reference (GHR). 2006; http://ghr.nlm.nih.gov/condition/greig-cephalopolysyndactyly-syndrome. Accessed 4/8/2011.