NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,777 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

adrenal gland
(uh-DREE-nul...)
A small gland that makes steroid hormones, adrenaline, and noradrenaline. These hormones help control heart rate, blood pressure, and other important body functions. There are two adrenal glands, one on top of each kidney. Also called suprarenal gland.

EnlargeAnatomy of the adrenal gland; drawing of the abdomen showing the left and right adrenal glands, the left and right kidneys, and major blood vessels. A cross section of an adrenal gland is in an inset showing the adrenal cortex and the adrenal medulla.

Anatomy of the adrenal gland. There are two adrenal glands, one on top of each kidney. The outer part of each gland is the adrenal cortex; the inner part is the adrenal medulla.