Kniest dysplasia is caused by dominant collagen II (COL2A1) mutations: parental somatic mosaicism manifesting as Stickler phenotype and mild spondyloepiphyseal dysplasia.

Abstract excerpt

We describe two unrelated children with Kniest dysplasia, a severe autosomal dominant form of chondrodysplastic dwarfism associated with cleft palate, progressive arthropathy, myopia and retinal detachment. In the first patient the disorder was caused by a 28 base pair exon 12/intron 12 deletion in the gene coding for type II collagen. Her mother had mild abnormalities of the vertebral bodies and long bones...

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