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NCI Dictionary of Cancer Terms

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12 results found for:       Q



Q10      
A nutrient that the body needs in small amounts to function and stay healthy. Q10 helps mitochondria (small structures in the cell) make energy. It is an antioxidant that helps prevent cell damage caused by free radicals (highly reactive chemicals). Q10 is fat-soluble (can dissolve in fats and oils) and is found in fatty fish, beef, soybeans, peanuts, and spinach. It is being studied in the prevention and treatment of some types of cancer and heart disease and in the relief of side effects caused by some cancer treatments. Also called coenzyme Q10, CoQ10, ubiquinone, and vitamin Q10.

QA      
A process that looks at activities or products on a regular basis to make sure they are being done at the required level of excellence. In clinical trials, QA makes sure that all parts of the trial follow the law and the Good Clinical Practice guidelines. Also called quality assurance.

qi    listen   (chee)
In traditional Chinese medicine, vital energy or life force that keeps a person’s spiritual, emotional, mental, and physical health in balance.

qigong    listen   (chee-gong)
A form of traditional Chinese mind/body exercise and meditation that uses slow and precise body movements with controlled breathing and mental focusing to improve balance, flexibility, muscle strength, and overall health.

QS21      
A substance from plants that is being studied together with vaccine therapy for its ability to improve the way the immune system responds to disease. It belongs to the family of drugs called saponin adjuvants.

Quadramet    listen   (KWAH-druh-met)
A drug used to treat pain caused by bone cancer and other cancers that have spread to the bones. Quadramet is a type of radiopharmaceutical. Also called samarium Sm 153 lexidronam pentasodium.

quadrantectomy    listen   (KWAD-ran-TEK-toh-mee)
Surgical removal of the region of the breast (approximately one quarter) containing cancer.

quadrivalent human papillomavirus (types 6, 11, 16, and 18) recombinant vaccine    listen   (KWAH-drih-VAY-lent HYOO-mun PA-pih-LOH-muh-VY-rus … ree-KOM-bih-nunt vak-SEEN)
A vaccine used to prevent anal, cervical, vulvar, and vaginal cancer caused by human papillomavirus (HPV) types 16 and 18 and genital warts caused by HPV types 6 and 11. It is also used to prevent lesions that are caused by these viruses and that can lead to anal, cervical, vulvar, or vaginal cancer. Quadrivalent human papillomavirus (types 6, 11, 16, and 18) recombinant vaccine is used in males and females aged 9-26 years. Quadrivalent human papillomavirus (types 6, 11, 16, and 18) recombinant vaccine is being studied in the treatment of other medical conditions. Also called Gardasil and recombinant human papillomavirus quadrivalent vaccine.

quality assurance    listen   (KWAH-lih-tee uh-SHOOR-ents)
A process that looks at activities or products on a regular basis to make sure they are being done at the required level of excellence. In clinical trials, quality assurance makes sure that all parts of the trial follow the law and the Good Clinical Practice guidelines. Also called QA.

quality of life    listen   (KWAH-lih-tee ... life)
The overall enjoyment of life. Many clinical trials assess the effects of cancer and its treatment on the quality of life. These studies measure aspects of an individual’s sense of well-being and ability to carry out various activities.

quinone oxidoreductase 1    listen   (KWIH-none OK-sih-doh-ree-DUK-tays ...)
An enzyme inside cells that makes certain molecules less toxic. Also called quinone reductase.

quinone reductase    listen   (KWIH-none ree-DUK-tays)
An enzyme inside cells that makes certain molecules less toxic. Also called quinone oxidoreductase 1.

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