COL2A1 and connective tissue disorder: High throughput sequencing (HTS) analysis of 34 genes associated with hereditary connective tissue disorders identified two sequence variants: a novel unclassified missense mutation, c.1361 T > C (p.Leu454Pro) in the gene for LDS type 2, TGFBR2 (NM_003242.5), as well as a likely pathogenic nonsense mutation, c.115C > T (p.Gln39*) in COL2A1 (NM_001844.4), a gene that encodes collagen type 2.