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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Chondrocalcinosis secondary to hypomagnesemia in Gitelman's syndrome.

Chondrocalcinosis can be associated with hyperparathyroidism, hemochromatosis, hypophosphatasia, and hypomagnesemia. Gitelman syndrome (GS), an inherited disorder due to loss of function mutations of the gene encoding the distal convoluted tubule Na-Cl cotransporter (NCCT), is characterized by hypokalemia metabolic alkalosis, hypomagnesemia, and hypocalciuria. A 53-year-old man, with history of recurrent joint effusions and pains affecting knees and wrists, had transient episodes of muscle pain, weakness, cramping, and fatigue over a one-year period. Laboratory tests showed hypokalemia, metabolic alkalosis, hypocalciuria, and hypomagnesemia related to genetically proven GS. Radiographs of affected joints revealed calcium pyrophosphate dihydrate deposition. This observation points out the necessity to look for Mg depletion (and especially GS) in the biological investigation of chondrocalcinosis. Additionally, the association between GS (NCCT inactivation) and high bone mineral density provides a new insight into the possible role of thiazides in osteoporosis management.[1]


  1. Chondrocalcinosis secondary to hypomagnesemia in Gitelman's syndrome. Ea, H.K., Blanchard, A., Dougados, M., Roux, C. J. Rheumatol. (2005) [Pubmed]
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