A group of inherited disorders of the adrenal glands, caused by enzyme defects in the synthesis of cortisol (hydrocortisone) and/or aldosterone leading to accumulation of precursors for androgens. Depending on the hormone imbalance, congenital adrenal hyperplasia can be classified as salt-wasting, hypertensive, virilizing, or feminizing. Defects in steroid 21-hydroxylase; steroid 11-beta-hydroxylase; steroid 17-alpha-hydroxylase; 3-beta-hydroxysteroid dehydrogenase (3-hydroxysteroid dehydrogenases); testosterone 5-ALPHA-REDUCTASE; or steroidogenic acute regulatory protein; among others, underlie these disorders.