or suprarenal gland
Either of two small, triangular endocrine gland s over the kidneys.
In humans, each gland weighs about 0.15 oz (4.5 g) and consists of an inner medulla, which produces the catecholamine hormones epinephrine and norepinephrine, and an outer cortex (about 90% of the gland), which secretes the steroid hormones aldosterone, cortisol, and androgen s (the last two in response to ACTH from the pituitary gland ). Diseases of the adrenal glands include pheochromocytoma (a tumour of the medulla) and the cortical disorders Addison disease , adrenal hypertrophy, Cushing syndrome , and primary aldosteronism.