Phaeochromocytoma – Nuclear Scanning Recently, a scanning agent, meta-iodobenzyl-guanidine (MIBG), was introduced. This compound is taken up by most benign and malignant phaeochromocytoma tissues and also by secondary deposits. See later: • Phaeochromocytoma – CT Scanning • Phaeochromocytoma – Arteriography See also: • Imaging in Adrenal Disease