BBS1 and Bardet-Biedl syndrome: Indeed, biallelic mutations have been reported in 19 genes, namely BBS1, BBS2, ARL6, BBS4, BBS5, BBS6 (MKKS), BBS7, BBS8 (TTC8), BBS9, BBS10, BBS11 (TRIM32), BBS12, MKS1, CEP290, C2ORF86, SDCCAG8, LZTFL1, BBIP1, IFT27, which account for 70–80% of BBS cases [11, 12].