In addition, there are other much rarer forms of CAH that could also be considered as causes of the symptomatology, including 11-β-hydroxylase deficiency, 17-α-hydroxylase deficiency, 3-β -hydroxysteroid dehydrogenase deficiency, congenital lipoid adrenal hyperplasia, and p450 oxidoreductase deficiency [33]; thus, for the remainder of the present work, CAH only indicates CAH due to 21-hydroxylase deficiency. The gene discussed is CYP2B6; the disease is classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency.