A Venezuelan Case of Schmid-Type Metaphyseal Chondrodysplasia with a Novel Mutation in COL10A1

Schmid-type metaphyseal chondrodysplasia (MIM 156500) is an uncommon autosomal dominant skeletal dysplasia caused by heterozygous mutations in the <i>COL10A1</i> gene (MIM 120110) encoding the α1(X) chains of type X collagen. We report an 8-year-old girl with waddling gait, short stature, mild dorsal scoliosis, coxa vara, short lower limbs, bowing of the femurs, genu varum, and metaphyseal fraying and splaying, who is a carrier of a novel heterozygous 2-bp (c.1894_1895dupTA; p.Leu633Thrfs*45) duplication in exon 3 of the <i>COL10A1</i> gene.