Since the early eighties, *I-MIBG (= *I-metaiodobenzylguanidine), which is stored in the neurotransmitter storage granules of chromaffin cells, has been increasingly used for the detection of pheochromocytomas and allied sympathoadrenal pathologies. The aim of this paper is to illustrate, by means of clinical examples, the role of *I-MIBG-scintigraphy in child neuroblastoma and to underline its original place, compared with other imaging techniques, in determining the neuro-ectodermal origin of a tumor as well as in establishing the extension of the lesions at the time of diagnosis and during follow-up.