This document provides information about Cushing's disease/syndrome, which is a hormonal disorder caused by prolonged high levels of the cortisol hormone. It is usually due to a benign tumor in the pituitary gland that causes excessive production of ACTH, stimulating the adrenal glands to overproduce cortisol. Symptoms include weight gain, high blood pressure, fragile skin, and mental disturbances. The condition is diagnosed through tests measuring cortisol and ACTH levels and imaging to identify tumors. Treatment involves medication, surgery to remove tumors, or adrenalectomy to address excess cortisol production.