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the biochemical indicators employed to detect the presence of cancers are collectively reffered to as tumor markers. these are abnormally produced molecules of tumor cells.tumor markers that have proved to be clinically useful are included in the selected list. they are:

oncofetal antigens- carcinoembryonic antigen(CEA).

alpha fetoprotein(AFP)

cancer antigen-125.

hormones- human chorionic gonadotropin.

calcitonin.

catecholamines.

enzymes- prostatic acid phosphatase.

neuron specific enolase.

specific proteins- prostate specific antigen.

immunoglobulins.

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