title: A new and superior adrenal imaging agent, 131I-6beta-iodomethyl-19-nor-cholesterol (NP-59): evaluation in humans.
abstract: We have reported tissue distribution studies in rats and dogs with a new adrenal imaging agent. 131I-6beta-iodomethyl-19-nor-cholesterol (NP-59). This agent concentrated five times higher in the adrenal cortex than 131I-19-iodocholesterol without increased concentration in non-adrenal tissues. We now report in 34 patients, the findings on scintigraphy with NP-59 compared with angiograms and/or adrenal vein hormone levels and histopathology, including 13 patients with hypercortisolism, 12 with primary aldosteronism, 2 with low renin hypertension, 5 with catecholamine excess, 1 with a liver metastasis from an aldosterone producing adrenal cortical carcinoma, and 1 with anaplastic adrenal cortical carcinoma. NP-59 adrenal cortical uptake was more rapid and intense and background activity was less prominent, allowing earlier and more definite interpretation of images than was possible with 131I-19-iodocholesterol.
mesh_terms: D000306:Adrenal Cortex Neoplasms / Q000175:diagnosis; D000307:Adrenal Gland Diseases / Q000175:diagnosis* / Q000473:pathology; D000311:Adrenal Glands; D000792:Angiography; D004341:Drug Evaluation; D005069:Evaluation Studies as Topic; D006801:Humans; D006929:Hyperaldosteronism / Q000175:diagnosis; D007457:Iodine Radioisotopes; D010690:Phlebography; D011877:Radionuclide Imaging; D013261:Sterols
chemical_list: D007457:Iodine Radioisotopes; D013261:Sterols