octreotide scan
(ok-TREE-oh-tide skan)
A type of radionuclide scan used to find carcinoid and other types of tumors. Radioactive octreotide, a drug similar to somatostatin, is injected into a vein and travels through the bloodstream. The radioactive octreotide attaches to tumor cells that have receptors for somatostatin. A radiation-measuring device detects the radioactive octreotide, and makes pictures showing where the tumor cells are in the body. Also called somatostatin receptor scintigraphy and SRS.
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carcinoid (KAR-sih-noyd)
A slow-growing type of tumor usually found in the gastrointestinal system (most often in the appendix), and sometimes in the lungs or other sites. Carcinoid tumors may spread to the liver or other sites in the body, and they may secrete substances such as serotonin or prostaglandins, causing carcinoid syndrome.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
device (dee-VISE)
An object that has a specific use. In medicine, wheelchairs, pumps, and artificial limbs are examples of devices.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
drug (drug)
Any substance, other than food, that is used to prevent, diagnose, treat or relieve symptoms of a disease or abnormal condition. Also refers to a substance that alters mood or body function, or that can be habit-forming or addictive, especially a narcotic.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
octreotide (ok-TREE-oh-tide)
A drug similar to the naturally occurring growth hormone inhibitor somatostatin. Octreotide is used to treat diarrhea and flushing associated with certain types of tumors.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
radioactive (RAY-dee-oh-AK-tiv)
Giving off radiation.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
radionuclide (RAY-dee-oh-NOO-klide)
An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radionuclides may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment. Also called radioisotope.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
receptor (reh-SEP-ter)
A molecule inside or on the surface of a cell that binds to a specific substance and causes a specific physiologic effect in the cell.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
scan (skan)
A picture of structures inside the body. Scans often used in diagnosing, staging, and monitoring disease include liver scans, bone scans, and computed tomography (CT) or computerized axial tomography (CAT) scans and magnetic resonance imaging (MRI) scans. In liver scanning and bone scanning, radioactive substances that are injected into the bloodstream collect in these organs. A scanner that detects the radiation is used to create pictures. In CT scanning, an x-ray machine linked to a computer is used to produce detailed pictures of organs inside the body. MRI scans use a large magnet connected to a computer to create pictures of areas inside the body.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
scintigraphy (sin-TIH-gruh-fee)
A procedure that produces pictures (scans) of structures inside the body, including areas where there are cancer cells. Scintigraphy is used to diagnose, stage, and monitor disease. A small amount of a radioactive chemical (radionuclide) is injected into a vein or swallowed. Different radionuclides travel through the blood to different organs. A machine with a special camera moves over the person lying on a table and detects the type of radiation given off by the radionuclides. A computer forms an image of the areas where the radionuclide builds up. These areas may contain cancer cells. Also called radionuclide scanning.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
SRS
A type of radionuclide scan used to find carcinoid and other types of tumors. Radioactive octreotide, a drug similar to somatostatin, is injected into a vein and travels through the bloodstream. The radioactive octreotide attaches to tumor cells that have receptors for somatostatin. A radiation-measuring device detects the radioactive octreotide, and makes pictures showing where the tumor cells are in the body. Also called octreotide scan and somatostatin receptor scintigraphy.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
tumor (TOO-mer)
An abnormal mass of tissue that results when cells divide more than they should or do not die when they should. Tumors may be benign (not cancer), or malignant (cancer). Also called neoplasm.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
vein (vayn)
A blood vessel that carries blood to the heart from tissues and organs in the body.
Source: The National Cancer Institute's Dictionary of Cancer Terms(http://www.cancer.gov/dictionary)
Source: The National Cancer Institute's Dictionary of Cancer Terms
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