CYP21A2 and congenital adrenal hyperplasia: Congenital adrenal hyperplasia (CAH) (OMIM# 201910) comprises a family of autosomal recessive disorders that are characterized by a group of enzymatic defects in cortisol biosynthesis due to defects in the steroid 21-hydroxylase gene (CYP21A2, OMIM*613815) (Nimkarn et al., 1993; Baumgartner-Parzer et al., 2020).