CLCNKB and Bartter disease type 3: In this patient two likely pathogenic variants in compound heterozygous state (p.[(?)];[(Glu490Lys)]) in the CLCNKB gene (Chloride Channel Protein ClC-Kb, pathogenic mutations cause type III BS, OMIM #607364) were identified confirming a clinical diagnosed of Bartter syndrome type 3.