Gitelman syndrome

Gitelman syndrome is a rare inherited defect in the renal tubule of the kidneys. It causes the kidneys to pass sodium, magnesium, chloride, and potassium into the urine, rather than allowing it to be reabsorbed into the bloodstream. The kidneys themselves are normal; the problem is in the shortage of the chemicals in the body.

Gitelman syndrome is an autosomal-recessive disorder: one defective gene is inherited from each parent.

Read more at Wikipedia.org