marker

(redirected from marker pens)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

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.

mark·er

(mark'ĕr),
1. A device used to make a mark or to indicate measurement.
2. A characteristic or factor by which a cell or molecule can be recognized or identified.
3. A locus containing two or more alleles that, being harmless, are common and therefore yield high frequencies of heterozygotes, that facilitate linkage analysis.

marker

(mär′kər)
n.
1. A biomarker.
2. A genetic marker.

marker

Medspeak
A value or indicator of the presence of a disease.

Molecular biology
An identifiable physical location on a chromosome (e.g., restriction enzyme cutting site, gene, minisatellite, microsatellite), the inheritance of which can be monitored. Markers can be an expressed region of DNA (gene encoding a protein) or a segment of DNA with no known coding function but whose pattern of inheritance can be determined. A marker can be localised to a specific region of the genome (e.g., all markers on the human transcript map are STSs).

Markers have also been defined as a genetic trait, of which one allelic form is selected or screened for after recombination. 

Suicidology
A potential physiologic indicator or predictor of an increased risk of suicide, the most promising of which is a decrease in serotonin in the brain.

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.

mark·er

(mahrk'ĕr)
1. A device used to make a mark or to indicate measurement.
2. A characteristic or factor by which a cell or molecule can be recognized or identified.
3. A locus containing two or more alleles that, being harmless, are common and therefore yield high frequencies of heterozygotes that facilitate linkage analysis.

marker

1. A trait, condition, gene, or substance that indicates the presence of, or a probable increased predisposition to, a medical or psychological disorder.
2. A gene whose location on a chromosome is known so that it can be used as a point of reference for MAPPING new mutations.

marker

see GENETIC MARKER.

mark·er

(mahrk'ĕr)
1. A device used to make a mark or to indicate measurement.
2. A locus containing two or more alleles that, being harmless, are common and therefore yield high frequencies of heterozygotes, which facilitate linkage analysis

Patient discussion about marker

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?

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)

More discussions about marker
References in periodicals archive ?
However, other reports have previously indicated that a 5ml indelible ink marker pen can mark up to 600 voters while a 100ml dipping bottle can mark up to 1000 voters.
It is recommended to use indelible marker pen with arrow extending to the site.
Visitors will get seasonal crime-busting advice as well as security devices like ultraviolet marker pens.
Teachers are banning permanent marker pens from schools in a bid to tackle graffiti.
Passengers were given marker pens to fill in the appropriate station - and then they have to rely on the Christmas spirit of others to ensure that they get a nudge at the right time.
Headteachers at St Joseph's and Hebburn Comprehensive schools have told pupils there is no need for students to use permanent marker pens and have banned them from school premises.
Community partnership officer Elaine Hale, from Little Park Street police station, has 1,000 UV marker pens to give away to people who call into the police box in Smithford Way on Sunday.
PC Tony Gilroy, crime prevention officer, has a number of free marker pens for residents and businesses in Newcastle East.
She said: "Mr Maxwell has much to say about the subject of paedophelia but unfortunately he uses marker pens to express this on other people's property.
He said that security-marked property would also act as a deterrent to would-be thieves - and he suggested marker pens might figure on people's Christmas shopping list.
The packs include security marker pens, a crime prevention booklet, a burglary risk assessment guide and some Crimestoppers information.
Police are appealing to all garages and car dealerships in Nuneaton and Bedworth to contact them so they can be given free ultra-violet marker pens to give to customers.