marker (redirected from historic marker)

marker /mark·er/ (mahrk´er) something that identifies or that is used to identify.

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tumor marker  a biochemical substance indicative of neoplasia, ideally specific, sensitive, and proportional to tumor load.

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mark·er (märkr)

n.

1. One that marks or serves as a mark.

2. A physiological substance, such as human chorionic gonadotropin or alpha-fetoprotein, that may indicate disease when present in abnormal amounts in the serum, as that caused by a malignancy. Also called biomarker.

3. A genetic marker.

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marker [mahr´ker]

something that identifies or that is used to identify; see also determinant.

cell-surface marker an antigenic determinant found on the surface of a specific type of cell.

tumor marker a biochemical substance indicative of presence of a tumor; ideally, it should be specific, sensitive, and proportional to tumor load. Called also biomarker.

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marker

a visual or electronic signal that permits identification and therefore sorting of individual items from a group.

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marker animals

males or teasers wearing chin-ball or siresine harness so that females mounted are marked by crayon or paint.

marker genes

genes with a known location on a chromosome and an obvious phenotype which are used as reference points when mapping other genes.

histochemical marker

marking of cells or tissues based on a chemical identification of the contents; the location of specific chemical substances in particular locations is marked by the installation of an electronic or color signal.

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marker

Internal medicine A diagnostic indicator for presence of a disease. See Biomarker, Bone marker, Breast marker, Cardiac marker, Cell marker, Cell surface marker, Gene marker, Genetic marker, Kinesic marker, Microsatellite marker, Pan B-cell marker, Pan T-cell marker, Selectable marker, Selected marker, Surface marker, Surrogate marker, Tumor marker.

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Patient discussion about marker.

Q. My wife(53) has elevated CEA and CA19.9 levels - near 150, without any concomitant reason/observation? Comment

A. Hi Bobby3,

The most important question is why were these tests done?
An elevated level may result from many causes, some of them are simple and some are more problematic. IMHO the best thing would be consulting her doctor to consider the need to check-up her alimentary system.
You can read more here (http://www.ascocancerfoundation.org/patient/ASCO+Resources/Patient+Guides/ASCO+Patient+Guide:+Tumor+Markers+for+Gastrointestinal+Cancers) and here (http://www.cancer.gov/cancertopics/factsheet/Detection/tumor-markers)

Q. what is a safe tumor marker number range?

A. depends on the marker...most of the markers are materials that found normally in our body. and there are a number of markers and their levels differentiate. what marker do you mean?