Duke Endocrinologists diagnose and treat adrenal gland disorders, including pheochromocytoma, Cushing's syndrome (elevated cortisol), and Conn’s syndrome (elevated aldosterone), all of which involve the overproduction of adrenal hormones. We also treat adrenal cancer, rare neuroendocrine tumors called paragangliomas, and a rare genetic condition called congenital adrenal hyperplasia, which affects the gland’s ability to produce hormones.