Test Details: 17 hydroxycorticosteroid is a product formed when the liver and other body tissues breakdown steroid hormone cortisol. This test can help determine if the body is producing too much cortisol. This test may be used to diagnose Cushing syndrome. Higher than normal level of 17-hydroxy corticosteroid indicate Cushing syndrome, depression, hydrocortisone therapy, malnutrition, obesity, pregnancy, high blood pressure, physical and emotional stress, tumour in pituitary gland.