Leukemia and the cancers derived from lymphoid and myeloid resources were at the leading rank of malignant, while the neuroblastoma which derived from embryogenesis was followed.

• 恶性肿瘤中以淋巴、造血系统和有关组织肿瘤占首位,其次为起源于胚胎组织的神经母细胞瘤;