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Congenital adrenal hyperplasia (CAH) refers to a group of autosomal recessive disorders that impair cortisol biosynthesis. CAH represents a continuous phenotypic spectrum with over 95% of all cases caused by 21hydroxylase deficiency. CAH owing to 21hydroxylase deficiency is the most common cause of genital ambiguity in the newborn and is present in about 1 in 15000 live births worldwide