The document provides an overview of 10 key things to know about cancer. It discusses that cancer is the abnormal growth of cells that can spread, and that the symptoms depend on the cancer type. The causes of some cancers are unknown. Cancers are typically diagnosed via biopsies, and treatment depends on the cancer type and stage. A cancer diagnosis causes anxiety for patients and loved ones, and support groups are available to help cope. A patient's prognosis depends on the specific cancer type and stage of diagnosis.
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