E#IEF
Yang
Bing-Hui
CANCER
PREVENTION
New diagnostic and therapeutic
techniques have been
introduced
in
recent years which facilitate earlier de-
tection
of
malignant disease and the
probability
of
curing cancer. Because
of
this,
increasing emphasis is being
given to the education
of
physicians,
public health groups, and the lay popu-
lation concerning cancer prevention.
Much of cancer prevention
is
implicit
in
the
understanding
of
etiologic
and
epiologic,
epidemiological studies,
which
provide
imporlant
information
regarding hereditary
and
environmen-
tal causal factors ol
cancer.
ldentifying
the approximate cause of
a
maior type
of cancer such as cigarettes in relation
to lung cancer and
etc.
may lead to et-
fective prevention. This type of preven-
tion
is
to
protect
the
human boby from
invasion
of any
potential carcinogenic
factor, and
is
thus called
primary
can-
cer prevention. However, it
is
particu-
larly important to identify populations
at
increased
risk and to apply
the
appro-
priate detection techniques
to
those
populations, for instances, the
first-de-
gree
female
relatives
ol
women with
breast cancer, heavy smokers,
and
populations among whom sexual activ-
ity
begins at
an
early age, since the risk
of cervical cancer among those
is
sub-
stantially greater. Obviously, this
may
lead to a
secondary
and
etfective
pre-
vention ol cancer, and
is
called second-
ary prevention which means prevention
of cancer development
in
populations
at high risk.
EgF{€
,
hEM,@E.ffiMWI
-
FA
^H--an-H,fi€rE)ffi
Eq
Z<
EE
"
SH
A*
,
€.'rt,M]Effitr'HAHNEH
E
#J
"
bu,ttrFfr
'ffi
ffi ry:EtrJ ffi
6
)\
i\E^fl 'pIFTWE#r^fr.d+.
EF'H
,ffi+H'€A&Ifi'EEEE
#
"
Ftrf:NE+'EffiETft.dWJ4A
,
4E
E
n+
ft.#r /-fi.
F.
H
4P.
I
W.+ET
Rffi,A,WEfr##&.'IJEffiH'flE
,ErOffitrE*tffi#J
"
Hftfuffifu EIF
'
'A€1Z,SA
Rlffi
fr+J
Eq
*,
6FUE€,EE
ffi'tr.+.
€ftsrK
6t
" ItrEf.
Et9rEsl
Fffi
&.
84ft#E#'t!,FnziTf;.fR,ffi
ThA
89,ffi{E
"'E€
trI
F
FIJ4+'.'+.E
*IE&#fr1rEEl*
"
trtL'
ffiffi'rre.
E
tr
ffi
EE
-L
rts eH,
,
Z,qffift,4.tffi.
H-Lx-Z<rt4ftY
"
I8
ff*Etrt
W,
flF
J<Fn
HffJ
*
tl
tu1.IF.E E-
t€
,ffi
ffJ*.rdBF'
;
18
fr
F1& ffi
W
-L
VsH.
;
4FrEXIW.ffi.'
?HSBFFiiH
ffi.fi.H*.,EVJH.
'
F-EFfiTW
Ffi
"
1re*.{ffi
Wr
H.E^.
Lffi
4'J
&4.
,Bry.fi,ft-,ffi
E
ffi,EI F.ffJ?Et,s
,
-b.1+EF,E
"
frtffii
ffi4#+
+tE--
E
le,EHAtHVJH.fr+J@.^, "
€E
ffiIEfr1r-freffiFnBun
t*tffi
+rr
H.rE
^..^,ffi
,
?EE
+t
IPIETE*
)J*l&.#J
,IEE4-ftEffiHtt4
4t6F##Z<='J
"
7E€ffirt'lFIRT
'
ttsH,--fiffi
*'
*6ffiEi6FfStEiS[E'E
iH
&.Fft,+q1-#J
,
rEdiffig+S
'ow+fil*rH
"
BJln'
nTffi=IT
ffi.W, EEFF#FET,-tr+W-
ImrHwf
Fn
-^v,Ffi
Efr
'
Etf
f
tg
E)effifi
.tb&
tr
EE
"fE EEEff
F
+Ef,F
H5AFp,
61E16-EtrgE_tEEE-J
r)(i6H
ilt
"
IR*WE
E
EJ
ry
7E
iE
+
f/f
,F
tR
t6,
fr\
#
)A
E
H!'#'fE'
#-fifq
ffi
42
4)e
ffi
AFEE
rr^ffi
E+
* 7'
E't'
99.r.lErF"|eE
4.ffit#lB'{ZFffi
l+FltJ
flR.H's.R'
Eirr
t
+
Eq++€
H5
+
#
+
#tJ:6F-,
Ffi
t;AEA=-"rt,
#ET
EIEF)A
f#-EF1e-rh
+
Ht
-tF'
E
rlb
EE
€EfitAf
IE
ffiFffaFrE
.
+ffi;2W'
FE.F.}+**'
EEIF.,FHtEtEF
'
9e
EE
tF
FE'B'$)hF
H!
EE'EI
"
gf
,fi
.rt
m
='
=A
eH
Ht
Fi-rEH
ffi
' gfSEffi
='
AAE-rtE+!ffX
ffi.*T
+HEEFIF,EI
T
4.F
-
r6
