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CA-125 is a molecule that can be detected in blood tests and is associated with ovarian cancer. While elevated CA-125 levels can support the detection of cancer, it's important to note that other cancers and non-cancerous conditions can also cause these levels to rise. Therefore, a CA-125 blood test alone is not sufficient for diagnosing ovarian cancer; a biopsy is required for confirmation. Ovarian cancer itself is characterized by the abnormal growth of cells in the ovaries, which are the reproductive organs that produce egg cells in women.12

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