Medications

Radiation therapy, targeted - Medical
Radiation therapy, targeted - Medical
Radiation therapy, targeted: A procedure that uses computers to create a 3-dimensional picture of the tumor in order to target the tumor as accurately as possible and give it the highest possible dose of radiation while sparing normal tissue as much ...
Radiation therapy, stereotactic - Medical
Radiation therapy, stereotactic - Medical
Radiation therapy, stereotactic: The use of a number of precisely aimed beams of ionizing radiation, each coming from different directions and meeting at a specific point, to deliver radiation treatment to that spot.Last Editorial Review: 4/27/...
Radiation therapy, internal - Medical
Radiation therapy, internal - Medical
Radiation therapy, internal: Radiation therapy in which a small container of radioactive material is implanted in the body, in or near the cancerous tumor.Last Editorial Review: 4/27/2011 5:27:15 PM Medical Author: ...
Radiation therapy, external - Medical
Radiation therapy, external - Medical
Radiation therapy, external: Radiation therapy in which the source of radiation is a machine outside the body.Last Editorial Review: 4/27/2011 5:27:15 PM Medical Author: William C. Shiel Jr., MD, FACP, FA...
Radiation therapy, conformational - Medical
Radiation therapy, conformational - Medical
Radiation therapy, conformational: A procedure that uses computers to create a 3-dimensional picture of the tumor in order to target the tumor as accurately as possible and give it the highest possible dose of radiation while sparing normal tissue as...
Radiation therapy, conformal - Medical
Radiation therapy, conformal - Medical
Radiation therapy, conformal: A procedure that uses computers to create a 3-dimensional picture of the tumor in order to target the tumor as accurately as possible and give it the highest possible dose of radiation while sparing normal tissue as much...
Radiation therapy, 3-D - Medical
Radiation therapy, 3-D - Medical
Radiation therapy, 3-D: A procedure that uses computers to create a 3-dimensional picture of the tumor in order to target it as accurately as possible and give it the highest possible dose of radiation while sparing normal tissue as much as possible....
Radiation therapy - Medical
Radiation therapy - Medical
Radiation therapy: The use of high-energy rays to damage cancer cells, stopping them from growing and dividing. Like surgery, radiation therapy is a local treatment that affects cancer cells only in the treated area. Radiation can come from a ...
Radiation sickness - Medical
Radiation sickness - Medical
Radiation sickness: See: Acute radiation syndrome. Last Editorial Review: 2/6/2004 Acute radiation syndrome: An acute illness caused by a dose greater than 50 rads of penetrating radiation to most or all of the body in a short time, usually a m...
Radiation pneumonitis - Medical
Radiation pneumonitis - Medical
Radiation pneumonitis: Inflammation of the lungs as a result of radiation. Although the radiation can be from various sources including accidents, today it is usually from radiation therapy. Radiation pneumonitis typically occurs after radiatio...
Radiation oncology - Medical
Radiation oncology - Medical
Radiation oncology: Also called radiation therapy or radiotherapy, radiation oncology is the use of high-energy rays to damage cancer cells and stop them from growing and dividing. A specialist in radiation therapy is called a radiation oncologist, a...
Radiation oncologist - Medical
Radiation oncologist - Medical
Radiation oncologist: A specialist in the use of radiation therapy as a treatment for cancer.Last Editorial Review: 4/27/2011 5:27:15 PM Medical Author: William C. Shiel Jr., MD, FACP, FACR ...
Radiation menopause - Medical
Radiation menopause - Medical
Radiation menopause: Menopause induced by radiation. Last Editorial Review: 4/27/2011 5:27:15 PM Medical Author: Melissa Conrad Stöppler, MD ...
Radiation fibrosis - Medical
Radiation fibrosis - Medical
Radiation fibrosis: Scarring of the lungs from radiation. Radiation fibrosis is a sequel of radiation pneumonitis (inflammation of the lungs due to radiation), as from radiation therapy. Radiation pneumonitis typically occurs after radiation treat...
Radiation during pregnancy - Medical
Radiation during pregnancy - Medical
Radiation during pregnancy: See: Prenatal radiation exposure. Last Editorial Review: 2/2/2004Prenatal radiation exposure: The exposure of an unborn baby to radiation. Radiation exposure of the fetus can occur when the mother's abdomen is exposed to ...
Radiation - Medical
Radiation - Medical
Radiation: 1. Rays of energy. Gamma rays and X-rays are two of the types of energy waves often used in medicine. 2. The use of energy waves to diagnose or treat disease. See also: Irradiation.Last Editorial Review: 4/27/2011 5:27:15 PM Irradiatio...
Radiate - Medical
Radiate - Medical
Radiate: To spread out from a central area. For example, sciatic pain may radiate outward from the lower back.Last Editorial Review: 4/27/2011 5:27:15 PM...
Radial keratotomy - Medical
Radial keratotomy - Medical
Radial keratotomy: An eye surgery procedure designed to flatten the cornea, reducing its optical power, to correct nearsightedness ( myopia). In the procedure, incisions (cuts) are made in the cornea. The procedure is said to be radial because th...
Radial head subluxation - Medical
Radial head subluxation - Medical
Radial head subluxation: See: Nursemaid's elbow. Last Editorial Review: 11/8/2003 Nursemaid's elbow: Partial dislocation of the elbow. The radius (a bone in the forearm) slips out of the ligament that holds it in place at the elbow. Thi...
Radial head dislocation - Medical
Radial head dislocation - Medical
Radial head dislocation: See: Nursemaid's elbow. Last Editorial Review: 11/8/2003 Nursemaid's elbow: Partial dislocation of the elbow. The radius (a bone in the forearm) slips out of the ligament that holds it in place at the elbow. Thi...
Radial drusen - Medical
Radial drusen - Medical
Radial drusen: See: Malattia leventinese.Last Editorial Review: 7/22/2004 Malattia leventinese: An hereditary form of macular degeneration that results in progressive and irreversible visual loss. This disease is characterized by the appearance in e...
Radial - Medical
Radial - Medical
Radial: A word with diverse meanings in medicine and the biomedical sciences: Pertaining to the radius, the smaller bone in the forearm. The radial artery is so named because of its proximity to the radius. Pertaining to the radius of a circle....
RAD51 - Medical
RAD51 - Medical
RAD51: An enzyme that coordinates recombination and that is important to the process of error-free DNA repair by recombination.Last Editorial Review: 5/8/2003...
Rad - Medical
Rad - Medical
Rad: Radiation absorbed dose, a measure for a dose of ionizing radiation. Last Editorial Review: 4/27/2011 5:27:15 PM...
Racemose aneurysm - Medical
Racemose aneurysm - Medical
Racemose aneurysm: An aneurysm that looks like a bunch of grapes.Last Editorial Review: 3/26/1998 2:30:00 PM...
Racemose - Medical
Racemose - Medical
Racemose: A descriptive term for something that is in a cluster or bunch.From the Latin "racemus" meaning "a cluster or bunch, particularly of grapes."Last Editorial Review: 4/27/2011 5:27:15 PM...
Race-based therapy - Medical
Race-based therapy - Medical
Race-based therapy: See: Race-based drug.Last Editorial Review: 11/14/2004 Race-based drug: A drug designed for a particular racial group. The first race-based drug was BiDil, a combination of two old drugs that increase levels of nitric oxide. BiD...
Race-based medication - Medical
Race-based medication - Medical
Race-based medication: See: Race-based drug.Last Editorial Review: 11/14/2004 Race-based drug: A drug designed for a particular racial group. The first race-based drug was BiDil, a combination of two old drugs that increase levels of nitric oxide. ...
Race-based drug - Medical
Race-based drug - Medical
Race-based drug: A drug designed for a particular racial group. The first race-based drug was BiDil, a combination of two old drugs that increase levels of nitric oxide. BiDil was tested in African-Americans and reported in 2004 to reduce deaths from...
Race - Medical
Race - Medical
Race: An ethnic stock or division of humans. Naturalists and ethnographers have long divided humans into a variable number of distinct races. However, DNA and other genetic studies have revealed that that most genetic variation, about 94%, is within...