Tumor markers are substances produced in large quantities by cancer cells OR by normal cells in response to the presence of a cancer. They may also be produced in small quantities by normal cells. These substances are usually proteins (enzymes, hormones, DNA, RNA,...
CITATION STYLE
Bharathan, A., & Sitaram, V. (2019). Tumor Markers in GI and HPB Cancers (pp. 139–154). https://doi.org/10.1007/978-981-13-3227-2_5
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