While mostly associated with 21-hydroxylase deficiency (21OHD), which constitutes more than 90% of CAH cases, it can also be caused by deficiencies in 11β-hydroxylase, 3β-hydroxysteroid dehydrogenase type 2, 17α-hydroxylase/17,20-lyase, P450 oxido-reductase, steroidogenic acute regulatory protein (StAR), and cholesterol side-chain cleavage enzyme (P450scc) [1]. This evidence concerns the gene CYP11A1 and classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency.