The adrenal glands are two glands located just above each kidney. The glands produce important hormones. These hormones regulate heart rate, blood pressure, and many other vital functions. The adrenal cortex is the outside layer of the two adrenal glands.
Cancers of the adrenal cortex are very rare. They make up 0.5-2 cases per million. The majority of these tumors produce excess hormones. The excess can alter hormonal balance.