Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «H»:
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...
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...
Hyperopia: Farsightedness; the ability to see distant objects more clearly than close objects.
Hyperopia may be corrected with glasses or contact lenses....
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....
Hyperosmolarity: In biochemistry, an osmolar concentration of the body fluids that is abnormally increased....
Hyperostosis: Overgrowth of bone. Hyperostosis is a nonspecific term
that does not refer to any particular condition....
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...
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 ...
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. ...
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...
Hyperplasia: A condition in which there is an
increase in the number of normal cells in a tissue or organ....
Hyperplasia of the prostate, nodular
Hyperplasia of the prostate, nodular: See: Benign prostatic hyperplasia....
Hyperplasia, benign prostatic
Hyperplasia, benign prostatic: See: Benign prostatic hyperplasia....
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....
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 ...