Source:http://linkedlifedata.com/resource/umls/id/C0047506
MSH: A guanidine analog with specific affinity for tissues of the sympathetic nervous system and related tumors. The radiolabeled forms are used as antineoplastic agents and radioactive imaging agents. (Merck Index, 12th ed) MIBG serves as a neuron-blocking agent which has a strong affinity for, and retention in, the adrenal medulla and also inhibits ADP-ribosyltransferase.,NCI: A synthetic, aralkylguanidine analogue of the adrenergic neurotransmitter norepinephrine (NE) and adrenergic neuron blocking agent with potential diagnostic imaging or antineoplastic activity when radiolabeled. Iobenguane, also known as metaiodobenzylguanidine (MIBG), is taken up and accumulates in the granules of adrenal medullary chromaffin cells and in the pre-synaptic granules of adrenergic neurons in a manner almost identical with that of NE. In radiolabeled forms, iobenguane may be used to image or eradicate neuroendocrine tissues and tumor cells.