What are common forms of childhood cancer?

Childhood leukemias. Childhood leukemias taken together are the most common form of childhood cancers. This is followed by brain tumors, lymphomas, and bone and soft tissue sarcomas. Other common childhood cancers include neuroblastoma and wilms tumor.
Depends on age... Some of the most common forms of childhood cancer in younger children are neuroblastoma, acute lymphoblastic leukemia (all), brain tumors, retinoblastoma and wilms tumor. Common adolescent cancers include all, rhabdomyosarcoma, osteosarcoma, ewings sarcoma and lymphomas (both hodgkin disease and non-hodgkin lymphoma).