18-OHCORTICOSTERONE Test is a laboratory analysis used to measure the level of this hormone in blood serum. It is one of the cortisol-derived hormones and plays an important role in regulating water and salt balance in the body. This test is an important tool for diagnosing adrenal gland disorders, such as Cushing's syndrome, where 18-OHCORTICOSTERONE levels may be abnormally elevated. It is also used to assess adrenal gland function in other conditions like hyperaldosteronism, helping physicians identify the underlying causes of specific hormonal imbalances. This test is accurate and reliable, providing valuable information to support appropriate treatment decisions.