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]. The gene discussed is BBS2; the disease is Bardet-Biedl syndrome.