Early Cancer Detection: What Blood Tests Can (and Can't) Reveal
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Can a Simple Blood Test Spot Cancer Early? Here's What Research Reveals
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Firstpost•08-03-2026, 18:07
Can a Simple Blood Test Spot Cancer Early? Here's What Research Reveals
•Blood tests are common for health monitoring but cannot reliably diagnose most cancers, especially early-stage, on their own.
•They offer clues by detecting abnormalities in blood cell counts (e.g., blood cancers) or identifying specific "tumor markers" like prostate-specific antigen.
•Circulating tumor cells indicate advanced, metastatic cancer and are primarily used for monitoring progression, not initial diagnosis.
•Researchers are actively investigating circulating tumor DNA and other molecules as potential early cancer indicators.
•Despite ongoing progress and promising studies, a single, definitive blood test for early cancer detection is still a future possibility.
