Nephronophthisis 13, also known as nphp13, is related to caroli disease, isolated and short-rib thoracic dysplasia 5 with or without polydactyly. An important gene associated with Nephronophthisis 13 is WDR19 (WD Repeat Domain 19). Affiliated tissues include kidney, and related phenotypes are proteinuria and stage 5 chronic kidney disease