Cushing's Syndrome – Adenoma (Nuc) Fig. 25.14b75Se Selenocholesterol adrenocortical imaging in Cushing's syndrome. Posterior view of the abdomen in a patient with Cushing's syndrome due to a solitary cortisol-secreting adenoma. A high uptake of 75Se selenocholesterol is seen in the cortisol-producing adenoma. In this case, the left adrenal is not visualised because of suppression of ACTH by the high cortisol level, thereby reducing the normal uptake of 75Se selenocholesterol. See also: • Cushing's Syndrome • Selenocholesterol Imaging in Cushing's Syndrome