CLDN16 and Autosomal dominant primary hypomagnesemia with hypocalciuria: Renal hypomagnesemia 3 (OMIM phenotype number 248250) is an AR condition due to inactivating variants in CLDN16, resulting reduced reabsorption of calcium (hypercalciuria)and magnesium (hypermagnesuria) with hypomagnesemia, NC, NL, and progressive CKD (Godron et al., 2012).