SLC12A3 and Gerstmann syndrome: Gitelman syndrome (GS) (MIM No. 263800), an autosomal recessive tubulopathy, induced by mutation in the SLC12A3 gene (MIM No.600968) and characterized by hypokalemic metabolic alkalosis, hypomagnesemia, hypocalciuria, secondary renin–angiotensin–aldosterone system (RAAS) activation and normal or lower blood pressure [1].