时间:2019-01-30 作者:英语课 分类:健康与经济


英语课

HEALTH REPORT - PSA Levels and Prostate Cancer
By Jerilyn Watson


Broadcast: Wednesday, June 09, 2004


This is the VOA Special English Health Report.


Many older men are tested each year for cancer of the prostate gland 1. This organ is part of the male reproductive system. One test measures levels in the blood of a protein known as P.S.A. P.S.A. is prostate-specific antigen. Most men with prostate cancer have increased levels of this protein.


The test results come back from the laboratory as a number. Doctors usually consider the results normal if the P.S.A. level is below four. But a new study raises questions. The study found prostate cancer in fifteen percent of older men with P.S.A. levels below four. But the researchers also found that most of these cancers were not especially dangerous. The risk of prostate cancer increased as the P.S.A. levels got higher.


A result above ten is considered high. But a high P.S.A. level does not always mean that a man has cancer. There could be an infection or an enlarged prostate. This is a common problem in older men.


The study involved almost three-thousand men. They were ages sixty-two to ninety-one. Ian Thompson of the Texas Health Science Center at San Antonio led the study. The results appeared in the New England Journal of Medicine.


Doctors often perform biopsies on men with increased P.S.A. levels. They cut a small amount of tissue from the prostate to look for cancer. If cancer is found, then the question arises of what to do next.


Doctors must decide how aggressive the cancer is. Non-aggressive prostate cancers usually grow slowly. They do not normally spread to other organs.


Researchers say almost thirty percent of men in their thirties and forties have prostate cancer but do not know it. By their sixties and seventies, however, two out of three men may have prostate cancer.


Some doctors advise men with non-aggressive prostate cancer to delay treatment. But, in the United States, almost thirty-thousand men per year die of prostate cancer. So most patients elect to have treatment. This often means an operation to remove the prostate.


Last December, Secretary of State Colin Powell had an operation in which doctors removed his prostate because of cancer. Senator 2 John Kerry, the Democratic presidential candidate, had the same experience early last year.


This VOA Special English Health Report was written by Jerilyn Watson.



n.腺体,(机)密封压盖,填料盖
  • This is a snake's poison gland.这就是蛇的毒腺。
  • Her mother has an underactive adrenal gland.她的母亲肾上腺机能不全。
n.参议员,评议员
  • The senator urged against the adoption of the measure.那参议员极力反对采取这项措施。
  • The senator's speech hit at government spending.参议员的讲话批评了政府的开支。
学英语单词
a-ps
Adustment
alizarin viridine
amnesic
Apocr
atrial premature contraction (apc)
Barrapoll
besort
big-girl pants
boykins
cane juice
carboxyprothrombin
centrifuge simulation
chassepots
Chattahoochee River
combined cycle systems
concentration tank
consignment delivery
crook tong
deterministic mixing
digital services
dimethylamidoantipyrine
discharge pulse
discumbrance
docimaster
dormant processor
drawne
drevitz
Emlenton
evening peak
exuscitated
fagopyrum esculentums
flaw hypothesis methodology
generator body
genus afropavoes
glacial boundary
goods yard
haemochorial placenta
Harbour Land Territory
heliopauses
in all quarters
in flagrant delict
irradiation pasteurization
isovaleryl diethylamide
klooches
Lachman tests
lakes bulk carrier
lateropleurite
linguistic relation
low number of seed set per cross
low-temperature memory
men's studies
Mendoza, I.
Moneragala Dist.
multiple instruction stream multiple data stream
neo-solaniol
non-adrenergic
nondistorter
North Pole of the heavens
over-feeble
own-
pinguinos
pipe in
pliers for cutting and stripping
plural subject
polysomic
prestressed-concrete vessel cooling system
procontarinia mangicola
pull ... down
pulveroboletus ravenelii
reactor building vacuum breaker
reinado
renewal of parts
rolled sheet metal
rutilances
sanatio
scribbllingblock
shaas
simple capital structure
sists-s
solar sails
soreness
space vehicles
spacer section
subarcuated
supremum theorem
tears apart
technomancy
telesurvey
tertiary channel
TGIAF
thyrochondrotomy
truncated-paraboloidal reflector
Ulmus campestris wheatleyi
unclassed felling
undersaturation
untoggle
up and down slope cultivation
uranium photofission
West Kotāpāra
world views
zehr