SRTD3 can be divided into subtypes according to phenotype: short-rib polydactyly syndrome type I (SRPS1), short-rib polydactyly syndrome type II B (SRPS2B), short-rib polydactyly syndrome type III (SRPS3), asphyxiating thoracic dystrophy 3 (ATD3), polydactyly with neonatal chondrodystrophy type I, or polydactyly with neonatal chondrodystrophy type III [2]. This evidence concerns the gene DYNC2H1 and short-rib thoracic dysplasia 6 with or without polydactyly.