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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «S»:

  1. Spotted fever Spotted fever
    Spotted fever: Also known as Rocky Mountain spotted fever. An acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard-shelled (ixodid) ticks. Occurs only in the Western Hemisphere. Anyone frequenting tick-infested areas ...
  2. Sprain Sprain
    Sprain: An injury to a ligament that results from overuse or trauma. Sprains occurs when there is a stretch or tear in one or more ligaments, slightly elastic bands of tissue that keep the bones in place while permitting movement at a joint. The treatment of a sprain involves applying ice packs, re...
  3. Sprain, ankle Sprain, ankle
    Sprain, ankle: See: Ankle sprain....
  4. Sprain, metatarsophalangeal joint Sprain, metatarsophalangeal joint
    Sprain, metatarsophalangeal joint: See: Metatarsophalangeal joint sprain....
  5. Sprained ankle Sprained ankle
    Sprained ankle: See: Ankle sprain....
  6. Sprue, nontropical Sprue, nontropical
    Sprue, nontropical: This condition results from an immune (allergic) reaction to gluten, a protein found in wheat and related grains and present in many foods that we eat. Sprue causes impaired absorption and digestion of nutrients through the small intestine. Symptoms include frequent diarrhea and ...
  7. Spur, heel Spur, heel
    Spur, heel: A bony spur projecting from the back or underside of the heel that often makes walking painful. Spurs at the back of the heel are associated with inflammation of the Achilles tendon (Achilles tendinitis) and cause tenderness and pain at the back of the heel that is made worse by push...
  8. Sputum Sputum
    Sputum: The mucus and other matter brought up from the lungs, bronchi, and trachea that one may cough up and spit out or swallow. The word "sputum" is borrowed directly from the Latin "to spit." Called also expectoration....
  9. Squamous cell carcinoma Squamous cell carcinoma
    Squamous cell carcinoma: Cancer that begins in squamous cells -- thin, flat cells that look under the microscope like fish scales. Squamous cells are found in the tissue that forms the surface of the skin, the lining of hollow organs of the body, and the passages of the respiratory and digestive tra...
  10. Squamous cell carcinoma in situ Squamous cell carcinoma in situ
    Squamous cell carcinoma in situ: An early stage of skin cancer. Also known as Bowen's disease. This is a tumor that develops from the squamous cells which are flat, scalelike cells in the outer layer of the skin (the epithelium). The term "in situ" (borrowed from the Romans) means "in the natural or...
  11. Squamous cells Squamous cells
    Squamous cells: Flat cells that look like fish scales. The word "squamous" came from the Latin squama meaning "the scale of a fish or serpent." We have a lot of squamous cells. They make up most of the cells in the outer layer of the skin (the epidermis), the passages of the respiratory and digesti...
  12. Squamous intraepithelial lesion Squamous intraepithelial lesion
    Squamous intraepithelial lesion: A general term for the abnormal growth of squamous cells on the surface of the cervix. The changes in the cells are described as low grade or high grade, depending on how much of the cervix is affected and how abnormal the cells are. Also called SIL....
  13. Squawroot Squawroot
    Squawroot: See: Blue cohosh....
  14. SRAS SRAS
    SRAS: Syndrome respiratoire aigu severe (in French). In English, severe acute respiratory syndrome or SARS....
  15. SRY SRY
    SRY: Sex region Y, a region on the Y chromosome that determines the sex of the individual. SRY is necessary and sufficient for male sex determination. It is the testis-determining factor. Mutations in SRY give rise to XY females with gonadal dysgenesis who appear to be normal females at birth, but...