儿童期肿瘤良性居多,而恶性者约占总数的2％。由于恶性肿瘤起病隐匿,病死率高。如何提高其治愈率,是儿科学领域中的一个急待解决的课题。病理学特点在病理学方面,要从形态学角度把真性肿瘤和其它类型的先天性畸形(瘤样病变)严格地区别开来是相当困难的。因为后者包括在宫内发育过程中组织分化的异常,出生后迁徙的细胞和组织团块可以在组织学上表现正常,但却以胎儿或婴儿的生长速度增殖,这些迁徙的细胞团伴随婴儿的长大而形成肿瘤或单纯的畸形。这种处于正常组织与 Tumors are benign in childhood, while malignant tumors make up about 2% of the total. Due to the occult onset of malignancy, high mortality. How to improve the cure rate is an urgent issue in pediatrics. Pathological features In pathology, it is quite difficult to critically distinguish true tumors from other types of congenital malformations (tumor-like lesions) from a morphological point of view. Because the latter include abnormalities of tissue differentiation during intrauterine development, migrating cells and tissue mass after birth can histologically behave normally but proliferate at fetal or infant growth rates, and these migratory cell masses accompany infants The growth and formation of tumors or simple deformity. This is normal tissue and