Cancer occurs when cells begin to divide and reproduce abnormally. If unstopped, cancer will continue to grow and spread across the body (called metastasis). There are many types of cancer, and it can begin in almost any organ. Often, cancers will form large, solid masses of cancer cells called tumors. While factors like diet, activity level, and tobacco are known to increase the risk of developing cancer in adults, the causes of cancer in children are more mysterious. Genetics may play a large role, so researchers are working to better understand those factors. Early detection can make treatment more successful, so many researchers also focus on ways to detect warning signs earlier. Because powerful treatments like chemotherapy and radiation are needed to defeat cancer, there is always a push to find new, effective treatments with minimal side effects.
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