A 1-month old baby present with frequent vomiting and failure to thrive. There are features of moderate dehydration. Blood sodium in 122 mEq/l and potassium is 6.1 mEq/l. The most likely diagnosis is?: (A) Gitelman syndrome, (B) Bater syndrome, (C) 21-hydroxylase deficiency, (D) 11-13 hydroxylase deficiency
Answer is C. Ans. is 'c' i.e., 21 hydroxylase deficiency Blood parameters indicate Hyponatremia and Hyperkalemia in this patient. All conditions other than 21 hydroxylase deficiency present with Hypokalemia.