In addition to nephronophthisis 1, the same NPHP1 deletion has also been identified in patients with Senior-Loken syndrome-1 (SLSN1, MIM# 266900) and Joubert syndrome 4 (JBTS4, MIM# 609583) with distinct phenotypes [35–37]. This evidence concerns the gene NPHP1 and Senior-Loken syndrome 1.