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[Chondrocalcinosis: rarely diagnosed frequent disease. A case report].

In this paper we described a case of 56 old patient with history of joint disease. We diagnosed chondrocalcinosis with hypomagnesemia. The patient was treated for gout during last 13 years. The frequency of chondrocalcinosis is estimated about 10% in patients after 50 years of age, but it is very rare diagnosed. A correct diagnosis is possible on the basis of simple tests and it allows to avoid the drugs which are not effective in this disease.