Abstract
Congenital adrenal hyperplasia (CAH) is an autosomal recessive endocrine disorder which can manifest after birth with ambiguous genitalia and salt-wasting crisis. However, genital ambiguity is not seen in male babies and may be mild in female babies, leading to a missed diagnosis of classical CAH at birth. In this review, we provide a standard operating protocol for routine newborn screening for CAH in Indian settings. A standardization of first tier screening tests with a single consistent set of cut-off values stratified by gestational age is also suggested. The protocol also recommends a two-tier protocol of initial immunoassay/time resolved fluoroimmunoassay followed by liquid chromatography tandem mass spectrometry for confirmation of screen positive babies, wherever feasible. Routine molecular and genetic testing is not essential for establishing the diagnosis in all screen positive babies, but has significant utility in prenatal diagnosis and genetic counseling for future pregnancy.
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