Category: R

  • Red eye

    A term used to describe inflammation of the eye that causes the eye to have a red appearance. Depending on its cause, red eye may be accompanied by pain, tearing, tenderness, or changes in vision. Since red eye can have a variety of causes, the eye needs to be examined by a medical professional to…

  • Rectal bleeding

    Bleeding from the rectum can be a sign of disease. Often, rectal bleeding results from a minor problem such as hemorrhoids. But it may be caused by a more serious disorder such as colitis, Crohn disease, or cancer. Any rectal bleeding requires prompt medical attention. Regular screening tests are also recommended to detect rectal bleeding…

  • Reactive airway disease

    A group of lung and lower airway disorders characterized by wheezing, a high-pitched whistling sound. Causes of reactive airway disease include the chronic condition asthma, bronchial infections such as bronchiolitis and bronchitis, colds, congenital lung defects, a tumor, cystic fibrosis, inhalation of a foreign object, and pneumonia. Besides wheezing, other symptoms of reactive airway disease…

  • Radioisotope scanning

    A nuclear medicine technique that uses radioactive isotopes injected into the bloodstream to visualize internal organs. Radioactive isotopes are substances that give off beta or gamma rays, which are similar to X rays. Radioisotope scanning allows for the observation and study of the size, shape, and location of organs or bones. The procedure can be…

  • Radiculopathy

    Damage to the nerve roots that enter or leave the spinal cord. Radiculopathy may be caused by problems such as disk prolapse, spinal arthritis, or thickening of the meninges (the membranes that cover the brain and spinal cord). Symptoms include severe pain and sometimes loss of feeling in the area supplied by the affected nerves.…

  • Relapsing polychondritis

    An inflammatory, autoimmune disorder that affects the cartilage and other connective tissues of the joints, as well as the ears, nose, larynx, trachea, eye, heart valves, kidney, and blood vessels. When the disorder affects the joints, the symptoms include pain and arthritis in large and small joints on both sides of the body. It is…

  • Resistance exercise

    Strength-building exercise that requires the muscles to push against or resist the weight of an object or a force, such as gravity. Resistance exercise, which may also be called strength training, body building, body sculpting, and strengthening exercise, can also increase a person’s endurance. Exercise in which a muscle contraction is opposed by an outside…

  • Rubella antibodies

    A test done on blood to find out whether a woman is protected against or susceptible to rubella (German measles). Although generally a mild vital disease in children, rubella can cause serious birth defects if contracted by the mother during her first three months of pregnancy.  

  • Rubella virus

    The virus that causes German measles.  

  • Rubacell

    A blood test done to determine whether a child or adult has had rubella (German measles), to screen for immunity to rubella, and to determine whether a child has congenital rubella infection.