Another subtype, the arthrochalasia EDS (aEDS, MIM #130060, and #617821), is caused by mutations in COL1A1 or COL1A2 (MIM *120160) genes which would impact the proper N‐terminal cleavage of the peptides they encode and is distinguished from other types of EDS by the frequency of congenital hip dislocation and extreme joint laxity with recurrent joint subluxations and minimal skin involvement (Steinmann et al., 2002). This evidence concerns the gene COL1A2 and Ehlers-Danlos syndrome, arthrochalasia type.