Introduction: Congenital adrenal hyperplasia (CAH) due to 21-Hydroxylase deficiency occurs in 90-95% of cases, being a common autosomal recessive condition that can present with a wide range of hyperandrogenemic signs in childhood or adulthood. Severity of this disease is correlated with the enzymatic blockade of 21-Hydroxylase which depends of the mutation in gene CYP21A2. Two clinical forms are possible: clas...