Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «F»:
Faciogenital dysplasia: See: Aarskog-Scott syndrome....
Facioscapulohumeral muscular dystrophy
dystrophy: A form of muscular
dystrophy that typically begins before age 20 with slowly progressive
weakness of the muscles of the face, shoulders, and feet. The severity of the
disease is quite variable. Although most people with facioscapulohumeral
Factitious disease by proxy
Factitious disease by proxy: See: Munchhausen syndrome by proxy....
Factitious disorder by proxy
Factitious disorder by proxy: See: Munchhausen syndrome by proxy....
Factor V: A coagulation factor needed for the normal clotting of blood. Also known as proaccelerin....
Factor V Leiden
Factor V Leiden: A genetic disorder of blood coagulation (clotting) that carries an increased risk of venous thromboembolism -- the formation of clots in veins that may break loose and travel through the bloodstream to the lungs or brain. On the molecular level, factor V Leiden is characterized by a...
Factor VIII: Factor eight, a key factor in the process of blood coagulation (clotting). Lack of normal factor VIII causes hemophilia (hemophilia A).
The gene for classic hemophilia was long known to be on the X
chromosome. Females carry the gene and transmit it to their hemophiliac sons. Female car...
Factor X: A coagulation factor, a substance in blood essential to the normal clotting process. Production of factor X takes place in the liver and requires vitamin K. The gene for factor X is located on chromosome 13 and is in band 13q34.
The "X" in factor X is the Roman numeral "ten." (All numbere...
Factor, colony-stimulating: A laboratory-made agent similar to a normally existing substance in the body that stimulates the production of blood cells.
The colony-stimulating factors (CSFs) include granulocyte colony-stimulating factors (G-CSF) and granulocyte-macrophage colony-stimulating factors ...
Factor, rheumatoid: See rheumatoid factor....
Facultative: 1. In general, not obligatory but rather capable of adapting to different conditions. The opposite of facultative is obligate.
2. In bacteriology, bacteria that can grow under either aerobic or anaerobic circumstances (with or without oxygen)....
Facultative heterochromatin: Chromosome material that can be either heterochromatin or euchromatin.
The inactive X chromosome is made up of facultative heterochromatin. When a woman
transmits that X chromosome to a son, the chromosome reverts to the euchromatic state and to genetic activity....
FAE (fetal alcohol effects)
FAE (fetal alcohol effects):
A softer diagnosis than fetal alcohol syndrome (FAS). The diagnosis of possible FAE is considered when: 1. The person has some signs of FAS; 2. The person does not meet all of the necessary criteria for FAS; and 3. There is a history of alcohol exposure before birth....
Fahr syndrome: This syndrome described in 1930 by T. Fahr is a genetic (inherited) neurological disorder characterized by abnormal deposits of calcium in certain of areas of the brain (including the basal ganglia and the cerebral cortex).
Symptoms may include motor function deterioration, dementia,...
Fahrenheit: Thermometer scale in which the freezing point of water is 32°F and the boiling point of water 212°F.
The Fahrenheit scale is still obstinately in use in the US. This anachronism requires conversion from Centigrade
(°C) to Fahrenheit (°F), and vice versa.
One degree &...