HNF1B and hyperuricemia: Considering the absence of clinical symptoms that could be highly suggestive of MCKD (such as hyperuricemia and gout (ADTKD-UMOD), anemia in childhood or adolescence (ADTKD-REN), MODY5 (ADTKD-HNF1β) or nephronophtisis (polyuria, polydipsia, anemia during childhood)) we decided not to perform a genetic analysis aimed at diagnose these diseases.