Boy with syndactylies, macrocephaly, and severe skeletal dysplasia: not a new syndrome, but two dominant mutations (GLI3 E543X and COL2A1 G973R) in the same individual.
The clinical features of spondyloepiphyseal dysplasia congenita resulting from the substitution of glycine 997 by serine in the alpha 1(II) chain of type II collagen.
Three new point mutations in type II procollagen (COL2A1) and identification of a fourth family with the COL2A1 Arg519-->Cys base substitution using conformation sensitive gel electrophoresis.
A single base mutation in the type II procollagen gene (COL2A1) that converts glycine alpha 1-247 to serine in a family with late-onset spondyloepiphyseal dysplasia.