Tumour marker

04 May 2011
A tumour marker is a substance found in the blood, urine or body tissues that can be elevated in cancer. Tumour markers can be produced directly by the tumour or by non-tumour cells as a response to the presence of a tumour.

Tumour markers can be used to detect tumours via screening programmes for common cancers; they can be used to monitor cancer survivors after treatment by detecting recurrence; and they can be used for diagnosis of specific tumour types, particularly in cases where biopsy is not feasible, such as brain tumours.
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