Britannica AI Icon

Quick Summary

21-hydroxylase is an enzyme crucial for synthesizing cortisol in the adrenal glands. A deficiency in this enzyme is the most common cause of congenital adrenal hyperplasia (CAH), an inherited disorder. This deficiency leads to reduced cortisol production and a compensatory increase in adrenocorticotropin. Consequently, adrenal androgens are overproduced, causing virilization in females and early sexual development in males. In severe cases, aldosterone production also decreases, leading to potentially fatal electrolyte imbalances. Treatment involves hormone replacement therapy.1

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.