When cells divide abnormally and uncontrollably, they can form a mass or lump of tissue. This lump is called a tumor. Bone tumors form in your bones. As the tumor grows, abnormal tissue can displace ...

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An 11-year-old British girl who loves sports, being outdoors, and running triathlons was given a heartbreaking diagnosis of a rare cancer after her parents discovered her “growing pains” were ...