====== Serum biomarker ====== [[Serum]] [[biomarker]]s are defined as [[substance]]s changing quantitatively in the serum during [[tumor development]]. Classically, a marker is synthesized by the tumor and released into circulation or expressed at the cell surface in large quantity by malignant cells. {{rss>https://pubmed.ncbi.nlm.nih.gov/rss/search/1bwpplXhivi4rwu9i8cxlydcRc6OOGYGS_42lLVWUvIXB8TQ4Q/?limit=15&utm_campaign=pubmed-2&fc=20221130061602}}