The adrenal gland sits above each kidney - one on each side of the body. It is made up of a medulla (middle) which makes adrenaline - this part works perfectly normally in CAH. The outer part of the adrenal gland is the adrenal cortex which makes three main hormones called steroids. These steroids are secreted into the blood stream and are necessary for normal health. It is the adrenal cortex and its hormones which are involved in CAH.

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MORE INFORMATION What is CAH? Steroids and CAH Different types of CAH CAH Genetics FAQs

Many thanks to Dr Gerard Conway, UCLH (University College London Hospital), 250 Euston Road, London NW1 2PQ for help with this section