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Blood Tests Can Now Detect Cancer Early
4 Sep
Summary
- Blood tests detect cancer by measuring altered cell counts or proteins.
- Liquid biopsy identifies tumour DNA fragments in blood for treatment planning.
- Persistent fatigue and unexplained weight loss are potential cancer signs.
Specialized blood tests are emerging as a vital component in early cancer detection, identifying physiological changes that may indicate malignancy. These tests assist in timely clinical intervention by measuring altered blood cell counts, elevated protein concentrations, or circulating genetic material released by cancer cells.
A complete blood count (CBC) can reveal abnormal levels of red or white blood cells, potentially signaling blood cancers like leukemia or indicating bone marrow function disruption. Tumour marker tests measure specific proteins, such as PSA or CA-125, which can be elevated in certain cancers, though these results are typically interpreted alongside other diagnostic findings.
More advanced, liquid biopsies analyze circulating tumour DNA (ctDNA) shed into the bloodstream. This offers valuable insights into a tumour's genetic profile, aiding in personalized treatment planning. While these laboratory advancements are significant, persistent physical symptoms like unexplained weight loss, fatigue, unusual bleeding, or new lumps also warrant thorough medical evaluation and can prompt further diagnostic workup.
