At least 21 genes are associated with BBS (OMIM database, accessed on 26‐09‐2018), among which BBS1 (MIM# 209901), BBS10 (MIM# 610148), BBS2 (MIM# 606151), BBS9 (MIM# 607968), MKKS (MIM# 604896) and BBS12 (MIM# 610683) are the most common. The gene discussed is BBS2; the disease is Bardet-Biedl syndrome.