Webster's New World Medical Dictionary

facies
Face.
facio-genito-popliteal syndrome
See 
popliteal
pterygium syndrome.
factitious disorder
See 
Munchhausen
syndrome.
Ff
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factor VIII
A coagulation (clotting) factor.
Classic hemophilia (hemophilia A) is due to a defi-
ciency in factor VIII activity. Also known as antihe-
mophiliac factor (AHF) or antihemophiliac globulin
(AHG). Human factor VIII concentrates as well as
recombinant (laboratory-produced) factor VIII are
administered in the treatment of hemophilia A. See
also 
hemophilia A.
factor, rheumatoid
An antibody that is measur-
able in the blood. Rheumatoid factor is commonly
used as a blood test for the diagnosis of rheumatoid
arthritis. Rheumatoid factor is present in about 80
percent of adults (and a much lower proportion of
children) with rheumatoid arthritis. It is also pres-
ent in patients with other connective tissue diseases,
such as systemic lupus erythematosus and Sjögren’s
syndrome, and in some with infectious diseases,
including infectious hepatitis.
FAE
Fetal alcohol effect.
Fahr syndrome
A rare, inherited, progressive
brain disorder that is characterized clinically by
involuntary movements, prolonged muscle contrac-
tions, and dementia. It is characterized by abnormal
deposits of calcium in the basal ganglia and cere-
bral cortex of the brain. The gene that is responsi-
ble for Fahr syndrome has been mapped to
chromosome 14. There is no cure for Fahr syn-
drome. Also called idiopathic basal ganglia calcifi-
cation. Treatment is directed toward relieving
symptoms.