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COMT
COMT Abbreviation for catechol-O-methyltransferase.
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Catechol-O-methyltransferase
COMT. An enzyme that catalyzes the degradation of catecholamines, including the neurotransmitters dopamine, epinephrine, and norepinephrine. COMT is also important in the metabolism of catechol drugs used in the treatment of hypertension, asthma, and Parkinson disease. A genetic polymorphism (a common normal variant) in COMT contributes to the responses to pain and stress.
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Computed tomography
An x-ray procedure that uses the help of a computer to produce a detailed picture of a cross section of the body. Also called a CT scan or CAT scan.
Computer addiction
A disorder in which the individual turns to the Internet or plays computer games in an attempt to change moods, overcome anxiety, deal with depression, reduce isolation or loneliness, or distract themselves from overwhelming problems. The elderly, as well as children and adolescents, are particularly vulnerable because they may not realize the extent of their dependency. In many instances, individuals with computer addiction may seek help for another condition, such as depression, phobias or other addictions.
Computerized axial tomography (CAT)
Cat scanning adds X-ray images with the aid of a computer to generate cross-sectional views anatomy. It can identify normal and abnormal structures and be used to guide procedures. CAT scanning is painless. Iodine-containing contrast material is sometimes used in CAT scanning. If you are having a CAT scan and are allergic to iodine or contrast materials, you should notify your physicians and radiology staff.
Computerized axial tomography scan
Pictures of structures within the body created by a computer that takes the data from multiple X-ray images and turns them in pictures. The CAT (computerized axial tomography) scan can reveal some soft-tissue and other structures that cannot be seen in conventional X-rays. Using the same dosage of radiation as that of an ordinary X-ray machine, an entire slice of the body can be made visible with about 100 times more clarity with the CAT scan.
Computerized tomography
Pictures of structures within the body created by a computer that takes the data from multiple X-ray images and turns them in pictures.
COMT
Concatemer
Multiple copies of a DNA sequence arranged end to end in tandem. Concatenate means to link together in a chain or in a series.
Concatenate
To link together in a chain or in a series. For example, the lymph nodes that appeared enlarged were concatenated, in a row like the links of a chain.
Concordance
1. The presence of any given condition such as HIV in both members of a couple. 2. In genetics, the presence of a phenotype such as asthma in both members of a twin pair. 3. In clinical care, agreement between physician and patient.
Concordant
1. Showing concordance, complete agreement. A couple may be concordant for a sexually transmitted infection, with both partners having it. 2. In transplantation genetics, between closely related species. A concordant xenograft is a transplant between members of closely related species.
Concordant couple
A pair of long-term sexual partners in which both partners have a sexually transmitted infection. The CDC has guidelines for counseling concordant couples in which both the man and woman are HIV-infected.
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