Tip 11: congenital adrenal hyperplasia

Incidence is 1:18,000 (girls=boys)

~90% have 21-hydroxylase deficiency

~50% present as a neonate (girls mainly with virilised genitalia, boys mainly with salt-wasting crisis)

External links: Khalid, JM., et al. Incidence and clinical features of congenital adrenal hyperplasia in Great Britain. Arch Dis Child 2012;97:101-106.

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