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小儿癌的特征,从组织学观点来看,是非上皮性的,几乎都是肉瘤,多发生于乳幼儿,且随年龄的变化其好发肿瘤的发生率亦有所差异。神经胚细胞瘤、Wilm′s 肿瘤、肝胚细胞瘤、网膜胚细胞瘤、胎儿的睾丸癌多见于乳幼儿,80%发生在5岁以下。而骨肿瘤、何杰金氏病、卵巢肿瘤等则多见于7岁以上的大年龄儿童。发病率最高的白血病以3～4岁多发。脑肿瘤除畸胎瘤外,在幼儿中几乎看不到,2～3岁和8～9岁多发。这些小儿癌发育极其迅速,急剧增长、局部浸润、早期转移使预后极其不良。然而,近年来由于以
The characteristics of pediatric cancer, from the histological point of view, is non-epithelial, almost all sarcoma, occurred in milk and toddlers, and with the change of age, the incidence of the incidence of malignant tumors are also different. Neuroblastoma, Wilm’s tumor, hepatoblastoma, omentum blastoma, fetal testicular cancer more common in children and young children, 80% occurred in 5 years of age. The bone tumors, Hodgkin’s disease, ovarian cancer are more common in older children over the age of 7 years. The highest incidence of leukemia in 3 to 4-year-old multiple. In addition to teratoma brain tumor, in young children can hardly be seen, 2 to 3 years old and 8 to 9 years old. The development of these children is extremely rapid and rapid growth of cancer, local infiltration, early metastasis so that the prognosis is extremely poor. However, in recent years due to