Inclusion Criteria:  I-1. Patients with PNT: ganglioneuroma or ganglioneuroblastoma or neuroblastoma, I-2. At the time of initial diagnosis of neuroblastic tumour, or at relapse/progression if not yet registered I-3. Written patient informed consent, or parents or legal representative written informed consent and assent of the child, adolescent or young adult  Non-Inclusion Criteria:  R-1. (Adult) Patients with olfactory neuroblastoma R-2. Central nervous system (CNS) neuroblastoma (as per the WHO classification)