Gitelman syndrome (GS), also referred to as familial hypokalemia-hypomagnesemia, is characterized by hypokalemic metabolic alkalosis in combination with significant hypomagnesemia and low urinary calcium excretion. The disease is Gitelman syndrome (Monarch Disease Ontology identifier MONDO_0009904). Also known as: hypomagnesemia-hypokalemia, primary renotubular, with hypocalciuria, primary renal tubular hypokalemic hypomagnesemia with hypocalciuria.