Incidental adenomas of the adrenal gland — also called incidentalomas — are tumors that are found unexpectedly during an imaging test for an unrelated health problem.

Aldosteronomas are a type of benign adrenal tumor that produces excess aldosterone. They are a common cause of Conn syndrome, also called hyperaldosteronism.

These tumors produce too much cortisol, a hormone that affects metabolism and helps the body recover from physical stress. Tumors of the adrenal cortex can cause a condition called Cushing’s syndrome.

Pheochromocytomas are adrenal tumors that produce excess catecholamines (epinephrine and norepinephrine).

Malignant (cancerous) tumors that arise in the adrenal cortex of the adrenal gland are called adrenal cortical carcinoma.