Webster's New World Medical Dictionary

roseola
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RTS
Rothmund-Thomson syndrome.
RU-486
The non-surgical abortion pill, which
has been used in combination with another drug
called misoprostol to terminate pregnancy at an
early stage. A woman using RU-486 can be no more
than 7 weeks pregnant. The drug has 95 percent
effectiveness. About 5 percent of women using RU-
486 in early pregnancy need additional medical
intervention due to incomplete abortion. Also
known as mifepristone.
rubella
German measles, a contagious viral dis-
ease whose symptoms include upper respiratory
tract infection, fever, swollen lymph nodes, and a
rash with small spots. Exposure of a pregnant
woman to rubella can infect and damage the baby.
Prevention of fetal rubella syndrome is the main
reason for rubella immunization. See also 
rubella
syndrome, fetal.
rubella immunization
See 
MMR.
rubella syndrome, fetal
A constellation of
abnormalities caused by infection of a mother with
the rubella (German measles) virus before the birth
of her baby. The syndrome is characterized by 
mental retardation and multiple birth defects,
including abnormally small head, cataracts, glau-
coma, abnormally small eyes, and cardiovascular
malformations. Deafness is common. The risk of
congenital defects in the fetus is greatest when the
mother is infected with the virus during the first 16
weeks of pregnancy. Also known as congenital
rubella syndrome.
rubeola
See 
measles.
rubor
Redness.
RUL
Right upper lobe, the upper-right lobe of the
lung.