A familial hypomagnesemia--hypercalciuria (Manz syndrome).

: We report a case of a rare inherited tubular disorder of linked transport of magnesium and calcium at the level of ascending limb of loop of Henle, characterized by hypomagnesemia, hypercalciuria and nephrocalcinosis, known as "Manz syndrome," who presented with polyuria, nystagmus and recurrent episodes of tetany with radiological evidence of rickets and nephrocalcinosis.