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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «H»:

  1. Hypermobility syndrome Hypermobility syndrome
    Hypermobility syndrome: A common benign childhood condition involving hypermobile joints (that can move beyond the normal range of motion). Symptoms include pains in knees, fingers, hips, and elbows. The affected joints may sprain or dislocate. Scoliosis (curvature of the spine) is more frequent. Us...
  2. Hypernatremia Hypernatremia
    Hypernatremia: Elevated blood sodium. Sodium is the major positive ion (cation) in fluid outside of cells. The chemical notation for sodium is Na+ (from natrium, a synonym for sodium). When combined with chloride (Cl), the resulting substance is table salt (NaCl). Excess sodium (such as from f...
  3. Hyperopia Hyperopia
    Hyperopia: Farsightedness; the ability to see distant objects more clearly than close objects. Hyperopia may be corrected with glasses or contact lenses....
  4. Hyperosmolar Hyperosmolar
    Hyperosmolar: In biochemistry, pertaining to an osmolar concentration of the body fluids that is abnormally increased. As, for examples, in hyperglycemic hyperosmolar syndrome and hyperosmolar coma....
  5. Hyperosmolarity Hyperosmolarity
    Hyperosmolarity: In biochemistry, an osmolar concentration of the body fluids that is abnormally increased....
  6. Hyperostosis Hyperostosis
    Hyperostosis: Overgrowth of bone. Hyperostosis is a nonspecific term that does not refer to any particular condition....
  7. Hyperoxaluria Hyperoxaluria
    Hyperoxaluria: An hereditary disorder that causes a special type of stone to form in the kidney and the urine beginning in childhood. Also known as oxalosis. The clinical features of this disease include the following: Urinary tract: Stones in the urine and kidney that are composed of calcium oxala...
  8. Hyperparathyroidism Hyperparathyroidism
    Hyperparathyroidism: Too much parathyroid hormone resulting in abnormally high levels of calcium in the blood (hypercalcemia). This can cause bone resorption and osteoporosis, calcium deposits in the kidneys, muscular weakness, nausea, vomiting, abdominal pains, and drowsiness. Hyperparathyroidism ...
  9. Hyperphosphatemia Hyperphosphatemia
    Hyperphosphatemia: A higher than normal blood level of phosphate. Phosphate molecules are particularly important as part of larger molecules in cell energy cycles. Higher than normal levels can be caused by ingestion of phosphate-rich foods, such as dairy products, or by kidney failure. ...
  10. Hyperpigmentation Hyperpigmentation
    Hyperpigmentation: Dark spots on the skin. Hyperpigmentation is primarily a cosmetic concern that can be covered with make-up, although in some cases (such as the cafe au lait spots associated with neurofibromatosis) it can be a sign of an underlying medical problem. If treatment of hyperpigment...
  11. Hyperplasia Hyperplasia
    Hyperplasia: A condition in which there is an increase in the number of normal cells in a tissue or organ....
  12. Hyperplasia of the prostate, nodular Hyperplasia of the prostate, nodular
    Hyperplasia of the prostate, nodular: See: Benign prostatic hyperplasia....
  13. Hyperplasia, benign prostatic Hyperplasia, benign prostatic
    Hyperplasia, benign prostatic: See: Benign prostatic hyperplasia....
  14. Hyperplasia, endometrial Hyperplasia, endometrial
    Hyperplasia, endometrial: A condition characterized by overgrowth of the lining of the uterus. Hyperplasia means overgrowth. The endometrium is the inner layer of the uterus....
  15. Hypertension Hypertension
    Hypertension: High blood pressure, defined as a repeatedly elevated blood pressure exceeding 140 over 90 mmHg -- a systolic pressure above 140 with a diastolic pressure above 90. Chronic hypertension is a "silent" condition. Stealthy as a cat, it can cause blood vessel changes in the back ...