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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «T»:

  1. Tumor, malignant giant cell Tumor, malignant giant cell
    Tumor, malignant giant cell: A type of bone tumor characterized by massive destruction of bone near the end (epiphysis) of a long bone. The site most commonly struck by this tumor is the knee -- the far end of the femur and the near end of the tibia. The tumor is often coated by new bony growth. It ...
  2. Tumor, primary Tumor, primary
    Tumor, primary: See: Primary tumor....
  3. Tumor, sweat gland Tumor, sweat gland
    Sweat gland tumor: A benign (harmless) skin tumor called a syringoma that derives from cells related to sweat glands. (These particular specialized cells are scientifically referred to as eccrine.) Syringomas tend to appear during puberty or adult life. They consist of small bumps 1-3 millimet...
  4. Tumor, Wilms Tumor, Wilms
    Tumor, Wilms: See: Wilms tumor....
  5. Tuna Tuna
    Tuna: A fish about which there are several health concerns. One concern involves carbon monoxide that prevents the flesh of the fish from discoloring and keeps it red. The FDA permits this practice in the US but Japan, Canada and the European Union have banned the practice because of fears that it ...
  6. Tunica albuginea Tunica albuginea
    Tunica albuginea: The whitish membrane within the penis that surrounds the spongy chambers (corpora cavernosa) in the penis and which helps to trap the blood in the corpora cavernosa, thereby sustaining erection of the penis. The term comes straight from the Latin tunica (covering or coat) + albugin...
  7. Tunica albuginea of the testis Tunica albuginea of the testis
    Tunica albuginea of the testis: The layer of dense whitish inelastic tissue that surrounds the testis....
  8. Tunnel vision Tunnel vision
    Tunnel vision: Loss of peripheral vision with retention of central vision, resulting in a constricted circular tunnel-like field of vision. And, by extension, any very narrow point of view. Also called tubular vision....
  9. Turban tumor syndrome Turban tumor syndrome
    Turban tumor syndrome: See: Familial cylindromatosis....
  10. Turbinate Turbinate
    Turbinate: A bone shaped like a top. The turbinate is a bone in the nose; it is an extension of the ethmoid bone, is situated along the side wall of the nose, and is covered by mucous membrane. The word turbinate is related to a turbine and tornado. They are all derived from the Latin turbo meaning ...
  11. Turbinectomy Turbinectomy
    Turbinectomy: Removal of a turbinate bone. The turbinate is a bone in the nose; it is an extension of the ethmoid bone, is situated along the side wall of the nose, and is covered by mucous membrane. For example, submucous turbinectomy (removal of the turbinate bone without removing the overlying mu...
  12. Turcot syndrome Turcot syndrome
    Turcot syndrome: A genetic disease characterized by polyps in the colon (large intestine) in addition to tumors in the brain. The polyps in the colon tend to become malignant. The brain tumors are also malignant. There are sometimes also skin abnormalities including cafe-au-lait (coffee-with-milk) ...
  13. Turf toe Turf toe
    Turf toe: An injury to the big toe due to forced hyperextension (upward bending back) of the toe. The damage is to the capsule of the joint (the first metatarsophalangeal joint) and the ligaments that connect the big toe to the foot. Hyperflexible shoes predispose to the injury. The big toe is painf...
  14. Turgor Turgor
    Turgor: The degree of elasticity of skin, sometimes referred to as skin turgor. The assessment of skin turgor is used clinically to determine the extent of dehydration, or fluid loss, in the body. The measurement is done by pinching up a portion of skin (often on the back of the hand) between two...
  15. Turner syndrome Turner syndrome
    Turner syndrome: A chromosome disorder in females that is characterized by the absence of all or part of a second sex chromosome in some or all cells. The condition occurs in 1 in 2,500 to 3,000 girls born. The physical features often include webbing of the neck (due to congenital lymphedema), shor...