There is a wide variety of tumors in children. They mainly include benign tumors such as hemangiomas and lymphangiomas, but also malignant tumors such as leukemia, central nervous system tumors and soft tissue sarcomas. 1. Benign tumors: the incidence rate of pediatric benign tumors is higher than that of malignant tumors, in which miscegenation tumors are dominant and the incidence rate of true benign tumors is lower. Malignant tumor is a kind of tumor-like malformation, such as hemangioma, lymphangioma, sebaceous adenoma and so on belong to malignant tumor. 2. Malignant tumors: the prevalent tissues of pediatric malignant tumors have obvious differences with adults, focusing on hematopoietic system, soft tissues, bones and central nervous system and other parts. Among them, leukemia is the most frequent malignant tumor in children, and other common malignant tumors include neuroblastoma, osteosarcoma, hepatoblastoma and nephroblastoma. In recent years, the incidence of pediatric malignant tumors has been gradually increasing. Therefore, if you find any abnormality in your child, please consult a doctor in time to find out the nature of the tumor and treat it aggressively if necessary.