What are the various stages of neuroblastoma?

4 stages. Stage 1: there is only one tumor, stage 2a: the tumor is not easily removed, but the disease is confined to one side of the body, all lymph nodes still remain free from the disease. 2b: the lymph nodes on the opposite side of the body are not found to show signs of the disease, but same side is affected, stage 3: the tumor has spread so that it can be found on both sides of the body. Stage 4:advac.
Five stages. Stage i localized to single organ stage ii extends beyond initial organ but does not cross midline of body stage iii beyond midline, encroaches upon adjacent organs stage IV distant mets, bone, lymph nodes, etc stage iv-s liver, skin, bone marrow.