Bardet-Biedl syndrome 13 (MONDO_0014441) is any Bardet-Biedl syndrome in which the cause of the disease is a mutation in the MKS1 gene. Also known as: BBS13, Bardet-Biedl syndrome caused by mutation in MKS1, Bardet-Biedl syndrome type 13, MKS1 Bardet-Biedl syndrome.