Addison's disease is a rare disorder of the adrenal glands. With Addison's, the adrenal glands do not produce enough of the hormones cortisol and aldosterone.

Adrenal Glands
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Addison's occurs because of damage to the cortex.
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Addison's disease is the result of gradual damage to the outer layer of the adrenal gland. This damage may be caused by: