They may be indicators of tumour stage and grade as well as useful for monitoring responses to treatment and predicting recurrence. Many chemical groups are represented including hormones, antigens, amino and nucleic acids, enzymes, polyamines, and specific cell membrane proteins and lipids.
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... it as early as possible, which is a huge huge challenge, as early stage tumours are seldom symptomatic. Screening techniques are extremely limited ... what therefore the population urgently needs is screening based on bio-markers. The ideal biomarker would be one that had very few false negatives ...
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