Smith-Mccort Dysplasia 2, also known as smc2, is related to cornelia de lange syndrome and fanconi anemia, complementation group i. An important gene associated with Smith-Mccort Dysplasia 2 is RAB33B (RAB33B, Member RAS Oncogene Family). Affiliated tissues include bone and smooth muscle, and related phenotypes are short neck and hyperlordosis