“…The impairment of 21-hydroxylase activity results in decreased cortisol and/or aldosterone synthesis and leads to a spectrum of clinical manifestations, ranging from a simple virilising (SV) type, with prenatal external genitalia virilisation in females, to the severely affected salt-wasting form, a life-threatening condition. [1][2][3][4][5][6] Congenital adrenal hyperplasia is an eligible disease for newborn screening (NBS) programmes, which aim to establish an early diagnosis in order to prevent significant morbidity and mortality. 4,[7][8][9] The pilot newborn screening for congenital adrenal hyperplasia (CAH-NBS) in Brazil revealed a high frequency of classical forms, approximately 1:10 000 live-births in Sao Paulo and Goi as states, 10 justifying the introduction of CAH in our National Newborn Screening Program in November 2013.…”