FISH
FISH: Fluorescence in situ hybridization, a molecular cytogenetic technique that tags genetic material with fluorescent molecules. FISH is useful for identifying chromosomes and parts of chromosomes, deciphering chromosome rearrangements, detecting chromosome abnormalities, and detecting and mapping genes. For example, a FISH probe to chromosome 21 allows the detection of cells with trisomy 21 (an extra chromosome 21, which is the cause of Down syndrome).
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- 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 caring for aquariums. The diagnosis is suggested by the history of exposure and […]
- 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 neutraceutical, a food that provides health benefits. Eating fish […]
- Fish odor syndrome
Fish-odor syndrome: An inborn error of metabolism that is associated with an offensive body odor whose scent is similar to the smell of rotting fish. Fish-odor syndrome is due to the excessive excretion of trimethylamine (TMA) in urine, sweat, and breath. This syndrome is caused by a mutation in the gene for the enzyme flavin-containing […]
- 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 frequencies. Hence it is an […]
- Fissure
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 abnormal. It is a painful crack in the edge of the anus and […]