MKKS and Bardet-Biedl syndrome: In Group II, MKKS causes the McKusick-Kaufman syndrome characterized by genitourinary malformations (MIM#236700), and BBS10, and BBS12 Bardet-Biedl syndromes (BBS) type 10 (MIM # 615987) and 12 (MIM # 615989) [1].