
Other cases are due to congenital adrenal hyperplasia or an adenoma (tumor) of the adrenal gland.Primary adrenal insufficiency is due to impairment of the adrenal glands.The adrenal glands are triangular-shaped organs on top of the kidneys.

Each adrenal gland has two distinct structures, the outer adrenal cortex and the inner medulla-both produce hormones.In humans, the right adrenal gland is triangular shaped, while the left adrenal gland is semilunar shaped.In mammals, the adrenal glands (also known as the suprarenal glands) are endocrine glands that sit atop the kidneys.Examples of adrenal gland in the following topics:
