Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «F»:
First do no harm
First do no harm: Slogan used in
medicine often in the Latin wording "primum non nocere," a
fundamental medical precept of Hippocrates (ca. 460-ca.
First stage of labor
First stage of labor: The part of labor when the cervix dilates fully
(to 10 centimeters). The first stage of labor is also called the stage of dilatation....
FISH: Abbreviation for fluorescence in situ
hybridization, a molecular technique used in chromosome studies.
FISH employs fluorescent (fluorescein tags) that
glow under ultraviolet light to detect the hybridization (the combination) of molecular probes with specific chromosomes and specific chromo...
Fish bowl granuloma
Fish bowl granuloma: Localized nodular skin
inflammation (small reddish raised areas of skin) caused by a bacterium called
mycobacterium marinum. Fish bowl granuloma is typically acquired by occupational or
recreational exposure to salt or fresh water, often resulting from minor trauma during
Fish oil, omega-3
Fish oil, omega-3: A class of fatty acids found in fish oils, especially from salmon and other cold-water fish, that acts to lower the levels of cholesterol and LDL (low-density lipoproteins) in the blood. (LDL cholesterol is the "bad" cholesterol.)
Omega-3 fish oil is therefore thought to be a neut...
Fish-odor syndrome: An inborn error of metabolism
associated with an offensive body odor, the smell of rotting fish, due to the excessive
excretion of trimethylaminuria (TMA) in urine, sweat, and breath. Persons with TMA may
experience tachycardia (fast heart rate) and severe hypertension (high bloo...
Fisher's exact test
Fisher's exact test: A statistical test of independence much used
in medical research. It tests the independence of rows and columns in a 2 X 2 contingency
table (with 2 horizontal rows crossing 2 vertical columns creating 4 places for data)
based on the exact sampling distribution of the observed f...
Fissure: A cleft or groove. A fissure can be normal or abnormal.
A fissure in the cerebral cortex is a normal feature. It is a deep fold that involves the entire thickness of the brain wall.
A fissure in the anus is distinctly abnormal. It is a painful crack in the edge of the anus and is very pai...
Fissure, palpebral: The opening for the eye between the eyelids. ...
Fistula: An abnormal passageway in the body. The fistula may go from the body surface into a blindpouch or into an internal organ or go between two internal organs.
For a common example, an anal fistula has an opening in the skin near the anus that leads into a blind pouch or may connect through ...
Fistula, anal: See: Anal fistula....
Fistulize: To form or make a fistula, an abnormal passageway. As, for example, fistulizing Crohn's disease....
Five-day fever: Also called trench fever, this is
a disease borne by body lice that was first recognized in the
trenches of World War I, when it is estimated to have affected more
than a million people in Russia and on the fronts in Europe. Trench
fever was again a major problem in
Five-lipoxygenase activating protein
Five-lipoxygenase activating protein: See: FLAP....
Fixation, external: A procedure that stabilizes and joins the ends of fractured (broken) bones by a splint or cast.
External fixation is as opposed to internal fixation in which the ends of the fractured bone are joined by mechanical devices such as metal plates, pins, rods, wires or screws....