Effi
+
#x.
Li
Xiao-rong
BE
()N THE ALERT F(}R
NEOPLASMS ()F THE
LARGE
INTESTINE IN YOUNG ADULTS
Tumors
of the
large
intes-
tine
(colon
and
rectum)
occur
equally
in
all age
groups
but
are
most frequently encounter-
ed in
persons
over
age
fofi-
five. These tumors, in
the
United
States
and
European
countries, account
for
about
only 2.2-4.57o in
young
adults.
However,
they occur
quite
common
in young
Chinese,
i.e.,
about
15Vo.
The majority of
tumors
in
young
adults
orig-
inating
in
the colon
are
of
epi-
thelial origin,
and
are
colloid
according
to
their
microscopic
appearance. Their
clinical
features are similar
to
those
in
the elderly. Although
the
causes
of
colonic
malignancy
are not
established,
there
appears
to be an
intimate
relation
between
the
adenomatous
polyp
and
the
development
of
carcinoma.
There appear
to
be
a
definite
risk of
malignant
polypoid
g,WF+^'
^wrffi
tx+
++F,,
-ww=lL+offi,ulT
#
F.Ihz.z-+.s%
"
F
Ellc
wffi#ffi4{KFsEft+'
{tr€
+
LXWrtr+HH'H'
F,,
-ffi.
W.E
+offi,t>)T
#
ffiiE
I
5"/",
ttrH
+
WtE'ffitfr,'frffi
ry
LW
-{Eil€*
++'H.,
E
rP-re4l
EHf
€4n,
U6q
EN.H)Dq
+Wffi,4+nj-.'E'rffifr+JEffiE
'
€4ttuilf-l-Oh
"
€
€E*
€ft-FEq
F-ffi).Mrffi#rffiL&
MHEA, 4tr&E4PitrF
€EfFffi€ftA
'
EIEfr-f,fte€
AF"-'JI.
H H
flF
fri
€K
€-'
++
ET
ft
DA
AEffi
[FfTE+ffi€ft€-FJ[-M'ffi
#rw+.+^M+)J
"
ffifi#aBH
fiFffiffi€ft-A+,
B?ffifr\Wffi]I
XW'EHWffJffi.€-W*,)EEffi
H&JVTEH€k€fiIfsffi*E#A
€t€k€
" HgrWr€Edft-RtrBt
HEm
Anffiji^ffileFrE+.*.tE
WH.
:
€ftA+
*e^ffi"Vrffi,?&dI
'!fr-x_Eiaryn
.
flFtr-Eg'
iEa
-8ffiF.tffi,,.r'{rffivrH.ffi
wffiffit*,ffiH!ffiH
"
E-2,ffi.
A
tr
H!#fr*E
#F*2'
EUrIrBirn
*1ffi+rJH.ffr+*ffiffiF{
,
€ryM
,Etr#
" WrLtt>^tl'
€ft€+,*
d*,ffiVJH.&,E4Tffij-.E'ffi#J
4.
6H
W
-
?#.
W
EA
H
#*.
tffi
+rr
H..
&grWr;{ffi+4h+tr1D}#
growth
and of
malignancy
in
colons of
patients
who
have
polyps. Congenital
multiple
polyposis
of the
colon has
an
establishingly high malignant
po-
tential.
Symptoms
of colon
carci-
noma are
usually vague
and
nonspecific
at the outset.
Detec-
tion
of
occult
or
gross blood
in
the
stools is
the
most
important
laboratory
technique
for
early
identification
of the
possibility
that
malignancy
of the
colon
exists.
ln
addition
to
this,
a
mass
or
distended
colon
on
routine
physical examination, definite
ab-
normalities
on
rectal examination,
or
evidences
of
weight loss
and
chronic
illness
should
make
one
consider the diagnosis
very
seriously.
The
combination
of
digital and proctosigmoidoscopic
or colonoscopic
examination
should bring out 60 percent of
all
cancers.
l6
