['We describe a 79-year-old man with biochemical and radiological features of Gitelman syndrome: hypokalemia, hypomagnesemia, hyperreninemic hyperaldosteronism in absence of secondary hyperaldosteronism causes, and chondrocalcinosis.\u2029', 'The diagnosis was confirmed by sequence analysis of the SLC12A3 gene showing the compound heterozygous mutation Gly439Ser and Arg1018Term. Aliskiren, a direct renin inhibitor, in combination with potassium and magnesium oral supplements was effective in ameliorating the electrolytic imbalance without any adverse effects.'] Is it never too late for a genetic disease : a case of a 79-year-old man with persistent hypokalemia?