The adrenal glands, located on top of the kidneys, are small triangular-shaped glands that secrete hormones to regulate body function. Adrenal tumors—or an abnormal growth in the adrenal gland—can be benign (non-cancerous) or malignant (cancerous).
Adrenal cancer is extremely rare; an estimated 250 cases are diagnosed in the U.S. annually. However, benign tumors are more common in adults ages 40 and older.
Generally, adrenal tumors are discovered on an imaging scan ordered for an unrelated reason or because of symptoms created by the gland’s excess secretion of hormones.