Childhood cancer refers to various types of cancer that occur in children, typically between the ages of 0 and 19. Unlike adult cancers, childhood cancers often develop quickly and can be harder to detect. Common types include leukemia, brain tumors, and neuroblastoma. Early diagnosis and treatment are crucial for improving survival rates. The causes of childhood cancer are not fully understood, but some factors may increase the risk, such as genetic conditions or exposure to certain environmental toxins. Support from families, friends, and organizations like St. Jude Children's Research Hospital plays a vital role in helping children and their families cope with the challenges of cancer treatment.