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1/2. Familial hypomagnesaemia--hypercalciuria leading to end-stage renal failure.

    Several disorders of hypomagnesaemia of hetary renal origin are now recognised. The cases of two sisters from a consanguineous marriage with the syndrome of renal magnesium wasting, hypercalciuria and nephrocalcinosis are presented. Pathological examination of the heterozygous parental kidneys revealed mild focal interstitial fibrosis. This condition is a previously unreported cause of end-stage renal failure in childhood, and this report suggests that transplantation from heterozygous parental donors can be successfully undertaken without recurrence of the syndrome.
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keywords = hypercalciuria
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2/2. nephrocalcinosis in three siblings with idiopathic hypercalciuria.

    Idiopathic hypercalciuria (IH) associated with nephrocalcinosis was found in three of six siblings. After the three affected children were maintained on a low-calcium diet, they demonstrated increasing hypercalciuria, parathyroid hormone, and vitamin D3 levels. An oral calcium loading test was not necessary to diagnose renal IH. During treatment with hydrochlorothiazide, the calcium excretion was normalized. These patients are remarkable because nephrocalcinosis is generally regarded as a rare complication of renal IH. Moreover, the fact that three of six siblings are affected raises the question of whether the renal form of IH is genetically distinct from other forms of IH.
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keywords = hypercalciuria
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