Webster's New World Medical Dictionary

itching, anal
See 
anal itching.
-itis
Suffix meaning inflammation. For example,
colitis is inflammation of the colon.
ITP
Idiopathic thrombocytopenic purpura. A
condition characterized by the sudden, abnormal
lowering of the platelet count. The cause is
unknown, but the immune system seems to play a
major role in the process by eliminating the
platelets. ITP can lead to dangerously low platelet
counts that can be associated with spontaneous
bleeding. Purpura are purplish bruises under the
skin that are often seen in this condition. ITP
requires treatments directed at suppressing the
immune system.
IUD
Intrauterine device.
IUGR
Intrauterine growth retardation.
IV
Intravenous.
IVF
In vitro fertilization.
ischemia
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Jacksonian seizure
See 
seizure, partial.
Jadassohn-Lewandowski syndrome
See
pachyonychia congenita.
jail fever
See 
typhus, epidemic.
Jakob-Creutzfeldt disease
See 
Creutzfeldt-
Jakob disease.
JAMA
The 
Journal of the American Medical
Association,
one of the two leading general medical
journals published in the US. JAMA is published by
the American Medical Association (AMA). It carries
original, generally well-documented, peer-reviewed
medical articles on many clinical and research top-
ics in medicine.
jamais vu
The illusion that the familiar does not
seem familiar. See also 
déjà vu; seizure disorders.
jaundice
A yellowish staining of the skin and
whites of the eyes (sclerae) with bilirubin, the pig-
ment found in bile. Jaundice can be an indicator of
liver or gallbladder disease, or it may result from
the rupture of red blood cells (hemolysis). In new-
born babies it is usually, but not always, a normal
condition. Also known as icterus. See also 
jaun-
dice, hemolytic; jaundice, hepatocellular; jaun-
dice, neonatal; jaundice, obstructive; kernicterus;
spherocytosis, hereditary.