The adrenal gland is located in the epigastrium, between the kidneys and diaphragm. It has an outer cortex and inner medulla. The cortex secretes corticosteroids and androgens. It is divided into three zones - the zona glomerulosa secretes mineralocorticoids, the zona fasciculata secretes glucocorticoids, and the zona reticularis secretes androgens. The medulla secretes catecholamines and is derived from neural crest cells. Disorders of the adrenal cortex include Cushing's syndrome, congenital adrenal hyperplasia, and Addison's disease, while disorders of the medulla