Failure to thrive, can this be Bartter's syndrome?

A case series of four children, of different age groups, having complaints of polyuria and failure to thrive. These cases include two infants, a toddler and a child and investigations revealed that they had hyponatremia, hypokalemia, hyperchloremia and metabolic alkalosis, leading to a diagnosis of Bartters syndrome. Two of the patients also had hypomagnesemia. All the children were put on treatment for Bartter's Syndrome, and they responded well but unfortunately one of them was lost to follow-up

Renal potassium wasting and hypocalciuria ameliorated with magnesium repletion in Gitelman's syndrome

A woman aged 45 years was presented with hypokalemic metabolic alkalosis and hypomagnesemia associated with renal potassium and magnesium wasting. Her 24-hour urinary calcium excretion was strikingly low despite normocalcemia and normal creatinine clearance, which is one of characteristic findings of Gitelman's syndrome (GS). She was evaluated for the responses following Mg supplementation for 10 days, which showed marked increments in serum potassium and magnesium as well as improvements of the degree of renal potassium wasting and hypocalciuria. This amelioration of abnormal biochemical pictures in this patient after Mg supplementation proposes that the hypokalemia with renal potassium wasting and hypocalciuria may be caused by abnormal Mg metabolism.