label: Salt-Wasting 21-Hydroxylase Deficiency
label_lc: salt-wasting 21-hydroxylase deficiency
description: A classic form of congenital adrenal hyperplasia characterized by complete absence of 21-hydroxylase activity resulting in deficiency of glucocorticoids and mineralocorticoids accompanied by androgen excess causing virilization in female infants. Mineralocorticoid deficiency results in renal salt-wasting, and if untreated, hyponatremia, hyperkalemia, and shock.