RJ Reynolds
International Cancer Congress, Budapest, Aug. 21-27, 1986 (860821-860827).
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- Risk of Lung Cancer From Passive Smoking, by Doll R. Penetration of A Tobacco Carcinogen Across Oral Mucosa in the Presence of Ethanol, by Squier Ca. Smoking or Health: the Role of Cancer Societies. Current Aspects of Cancer Epidemiology. Effects of Cigar
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- 27 Feb 1998
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- Ussr Academy, O.F. Medical Sciences
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- Intl Cancer Congress
- Intl Union Against Cancer
- Eckhardt, S.
- Mirand, E.
- Roswell Park Memorial Institute
- Assn, O.F. American Cancer Institutes
- Doll, R.
- Gray, N.
- Hirayama, T.
- Japans Natl Cancer Center
- Radio Free Europe
- Adams, L.
- Chermann, J.C.
- Pasteur Institute
- Gallo, R.
- Peto, R.
- Radcliffe Infirmary
- Trichopoulos, D.
- Peto, J.
- Institute, O.F. Cancer Research
- Schuller, H.
- Univ, O.F. Tn
- Univ, O.F. Saskatchewan
- Klaassen, D.J.
- Grafstrom, R.
- Stockholms Karolinska Institute
- Harris, C.
- Hardell, L.
- Univ Hospital
- Univ, O.F. Ia
- American Helath Foundation
- Rivenson, A.
- Hoffman, D.
- Hecht, S.
- Mitsukaido Laboratories
- Auerbach, O.
- Garfinkel, L.
- Veterans Administration Medical Cen
- Kunze, M.
- Univ, O.F. Vienna
- Muir, C.
- Heald, D.E.
- Intl, A.G. For Research, O.N. Cancer
- Gadberry, G.R.
- Simpson, D.
- Britains Action, O.N. Smoking & Health
- Bjartveit, K.
- Adenis, L.
- Stjernsward, J.
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- Centre Oscar Lambret
- Stanley, K.
- Univ, O.F. Bergen
- Kvale, G.
- Heuch, I.
- Mackay, J.
- Hong Kong Anticancer Society
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- Institute, O.F. Preventive Oncology
- Jedrychowski, W.A.
- Axelson, A.
- Ryser, H.
- Boston Univ
- Band, P.
- Cancer Control, A.G.
- Maltoni, C.
- Institute, O.F. Oncology
- Vainio, H.
- Barrett, J.C.
- Zurhausen, H.
- West German Cancer Research Center
- Aoki, K.
- Nagoya Univ
- Fischinger, P.
- Pershagen, G.
- Natl Institute, O.F. Environmental, M.E.
- Heinrich, U.
- Mohr, U.
- Fraunhofer Institute For Toxicolog
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- St Univ, O.F. Ny
- Schmidt, C.G.
- Univ, O.F. Essen
- West German Tumor Center
- Clark, R.L.
- Univ, O.F. Tx
- Reagan
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- Wyngaarden, J.
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- Zahn, L.
- Leonard Zahn & Assoc
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Document Images
SUBJECT: International Cancer Congress,
Budapest, Aug. 21-27, 1986
The logistics of the'congress were like M.urphy's Law -- any-
thing that could go wrong did. Not even th-e scientific part could
help -- that was generally old-hat.. "A-disaster" was the brief
(and private) description of the'meeting by a Canadian researcher
who represents his country in international cancer matters. He
was right on target.
Comedy or disaster, or both, the quadrennial meeting of the
International Union Against Cancer (UICC,. which is headquartered
in Geneva, Switzerland) played to a full house of about 8,000
attendees from 82:-countries and, for the first time, featured a
series of international satellite telecasts. A fairly large press
contingent, predominantly European and mostly Hungarian, was
present to report the event. Several Italian newsmen came because
a pharmaceutical company in their homeland had paid their way;
the company sponsored a session on an anticancer drug it had de-
veloped and also subsidized the congress's daily news letter, a
four-page publication that blatantly promoted the company's prod-
ucts and also had several antismoking stories during the week.
Other writers seemed to have similar benefactors.
The subject of smoking and health arose early and often:_even
before the official opening ceremony, congress secretary-general
SANDOR ECKHARDT of Budapest referred to it during the first of
many press conferences. He noted in part that in countries such
as Norway and Scotland, where there are strong antismoking cam-
paigns, the incidence of lung cancer is beginning to fall. :
There were two press offices and one room for press conferen-
ces. One, for English-speaking writers, was under the direction
of EDWARD MIRAND of Roswell Park Memorial Institute, Buffalo, NY,
secretary-general of the 1982 cancer congress and now secretary-
treasurer of the Association.of American Cancer Institutes. The
,. .. ...
other was directed by 'a Hungarian-'and '='Was,-_-.for-press .- people from
Iron'Curtain countries; -the_Hungarian'nominallyYWas in charge of
the entire-press'operation;"but virtually all =t~ie-maferial -- and
available to'~the -pr _.ess°-came _ ....~fi~o _.__m.~
interviewees -- avail` ' Mirand's -sector.
Major. news_ attention":to_".s~inokiing_'and"-;`'cancer ;;developed early in
the meeting because of°-a -press releasethat"_cited some selected
commen,ts from a paper._by -Sir'RICHARD'DOI.L: -on` risks _'of active and
passive smoke exposure; stories`, appe.ared,°-in _~many newspapers in a
number-of west European nations. As the ~meeting''-,progressed, the
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media people were exposed to other well-known antitobacco acti-
vists from around e the world, several of whom were invited to the r~..
press room foi~`-interviews. They included NIGEL GRAY of Melbourne,
Australia, and TAKESHI HIRAYAMA from Tokyo, where he formerly was
the chief epidemiologist at Japan's National Cancer Center. Doll
was videotaped for an international television broadcast. A few
writ
r
attended
ll
i
t
rt
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oki
A
e
s ac
ua
y
. some sess
ons on sm
er
repo
ng.
for Radio Free Europe, based in London,"-flew-in for two days of
coverage; his first, and biggest, story was on smoking and can-
cer. The medical, writer for a Houston: paper was there and she
also.filed at least two stories.on smoking.
The program contained several sessions dealing specifically
with various aspects of smoking, including cessation and anti-
smoking legislation. Additionally, numerous presentations on the
subject were:scheduled for various other sessions. Most of the
material was familiar and so were many of the speakers. One pre- ,
sentation, by a United States scientist,.,was different, if not
new; it was ignored or overlooked by the press. (See item No. 2
below.) ~
Many top American Cancer Society (ACS) officers were in Buda-
pest and participated in various sessions dealing with smoking.
None was a scientist. LANE ADAMS, who recently retired after many
years as the society's executive vice president, gave.a plenary
lecture. The ACS also had an exhibit with an antismoking theme.
The congress site was an old exposition area several miles
f rom downtown Budapest. It consisted of a number of utilitarian
buildings, many of them seemingly large enough to-contain several
football fields each, constructed in helter-skelter fashion on
several acres of land. None of the buildings was air conditioned.
Meeting rooms in many of the structures had only partial walls --
a speaker in one "room" was heard next door and down the line. In
buildings where there were full walls, there were no public ad-
dress systems in the rooms, and only a-few rooms had individual'
radio receivers. Slide projectors and other equipment were some-;'
what less than modern. Many speakers and listeners had a diffi-
cult and frustrating time. (This despite the fact that Hungary
received more than the normal amount of financial support, espe-
cially _ _
cially from the U.S.)
ffici
l
na
a
Top UICC o
l program
s-from the U.S.-didn
t see the fi
until they arrived in Budapest for the congress. This document
i
tak
,
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i
.
s
i
th
g,`
s
es
-had numerous m
om
er
,.ag-
,
ome_amus
ssions; etc
n
o
.gravating to affected participants."For."example,:paper No..1098
on the program was followed by No.,5045, then No. 4950; this was
a common occurrence.y,Some,numbers were omitted entirely. Discov-
ering when: and where'certain papers were being. given became an
ering ~
adventure at times. The problem was compounded by-the fact that o
the speakers were listed-in
a separate document -which also had ~,
,
numerous errors., _P
_ .'''.. ~> .'l. . ... .3: . u-:. 0
Several prominent cancer -researchers commented privately_..",on. ~
^'
the overall poor scientific quality of the program and vowed that
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3:
the level would be considerably higher at the 1990 congress (in
Hamburg, West Germany). However, there were some informative and
interesting presentations during the meeting that included 18
major lectures, 4 special and 12 plenary lectures, 82 symposia,
79 round-table conferences, 5 audiovisual sessions, 190 poster
discussions, and more than 4,200 individual poster presentations.
Unfortunately, some rather awful material crept in, especially in
the-poster sessions. Apparently not all, the sessions had been ref-
ereedi,
One of the most important scientific reports of the congress
came at a session on AIDS (this seemed to attract the biggest
turnout of the congress): JEAN-CLAUDE CHERMANN of the Pasteur
Institute in Paris disclosed he'd found the AIDS virus present in
mosquitoes and certain other blood-sucking insects in Africa.
ROBERT GALLO, a leading AIDS researcher at the U.S. National
Cancer Institute, questioned the significance of the finding.
(Later, and privately, he said he'd been "shafted" by the
Frenchman.) For the first time at such congresses, significant attention
was paid to the subject of cancer nursing. Indeed, 100 U.S. nur-
ses were at the meeting as the result of a grant. There also were
the expected sessions on oncogenes (and antioncogenes), immunol-
ogy, environmental carcinogens, and cancer therapy (mostly animal
work reported by U.S. scientists; human chemotherapy studies of
great variety and number reported by Japanese and Italian inves-
tigators). And so on.
The highlights:
the the Imperial Cancer Research Fund Unit at Radcliffe Infirmary
in Oxford, U.K.
Doll got considerable new.s attention in several European na-
tions because of a press release, headlined "Risk of Lung Cancer
From Passive Smoking," citing his claim"that "up to-half the lung
cancer deaths among nonsmokers may be-due to passive smoking.
The quotation; if not-.a-little 'inaccurate,~7rtas at.least-incom-
plete. Doll -had a summary`ofy data' from-'=,-10 ."` studies (in the U.S.,
Japan, Greece, Hong Kong,_ and the U.K.) on the-'risk,of_.lung can-
cer in nonsmokers by-their spouse's smoking habits. Here's what
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he actually wrote: ~
f.- _. . .r . - *'1 `- .. . . , .. . ...
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1. Doll was a busy participant. He was scheduled to give the
same paper at twQ.different sessions (morning and afternoon) on
the same day. He literally halved the paper, which dealt with the
risks of active and passive smoking, and had a different title"'.
for each session). The previous day he delivered- a paper by the'
(temporarily) absent RICHARD PETO, his protege and colleague at
(of.the studies)--are.consistent with an
"The great majority
increase in risk, when,..the'-spouse smokes,, " ; of 20. to. 50x. I t need
not be assumed,-however, that the-risk is the-same in;all,coun-
tries, as differences in culture and in housing may well affect
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the relative amounts of smoke to which a person is involuntarily
exposed by the habits or his or her spouse. Nor can it be assumed
that the estimated risks are real, as they depend on the accuracy
of smoking histories,and it is possible that self-reported non-
smokers -have, in fact, smoked actively to a small extent that is
correlated with their spouses' habits unless they have been in-
terrogated in much greater detail than they commonly are. If,
however, the risks are real, they :can constitute only a-fraction
of the total risk as all nonsmokers, whether married to smokers
or not, must be exposed involuntarily to:'smoke from other sour-
ces. A third test, namely examination of the:trend in incidence
in nonsmokers is doomed to -failure as*the rarity of lung cancer
in nonsmokers will ensure that measurements of its incidence are
too imprecise for changes of a likely size to be detected.
"I conclude, therefore, that exposure to tobacco smoke in the
ambient atmosphere must be assumed __ to____ cause._. some risk of_ lung
cancer, but that the -size of the risk is-uncertain. It may, how-
ever, be large enough to account for up to 50% of the risk of
lung cancer that i-s-actually observed in nonsmokers."
f
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In the same paper, but not cited in the press release or, so
far as is known, in press stories, Doll discussed a recent review
that claimed various animal carcinogens exist in tobacco smoke.
He continued: "Unfortunately, it is impossible to estimate the
risk that these ambient chemicals may induce, partly because we
do not know which of the chemicals in tobacco smoke is respon- -
sible for its carcinogenic effect in active smokers and partly
because the_ physical state_of__the__various chem.i_cals_-___and_ their
_ _
distribution within the respiratory tract is (sic) different when
they are inspired actively and passively." - -
Doll discussed passive smoke exposure at a morning session
that purportedly was to deal with the role of cancer societies in.
smoking and health. He was-cochair and lead-off speaker at an af-..
ternoon session on "Analytic Epidemiology!'__ that had a talk on --
passive smoking by DIMITRI TRICHOPOULOS of Athens. He'd leave
that topic to Trichopoulos, he said, and would talk about other
things, such as the effect of changing cigarette consumption pat-
erns and lung cancer mortality trendsn in different countries.
(Trichopoulos said nothing new.)>
The mean tar delivery in many nations.,is now less than half
what it was in the 1950s, he said, but.the-effect on..risk reduc-
-- .-_---_---_ ------
tion is is unclear. Lung- cancer mortality rates at-young ages,
35-44 years, have risen in seven countries (Czechoslovakia +17%,
France +23%, West Germany +22%, Hungary. +43%,.Italy +7%, Japan
+15%, Poland +12%) and fallen-:in five_'-(Australia -15%,. England
and Wales -35%, Hong Kong -45%,, The Netherlands -53%, U.S. -32%).
In the 65-74-year bracket, there were slight reductions in
Hungary and Czechoslovakia, but increases in the other 10 coun-
tries, with the highest being in Italy (+44%), Japan (+36%), Hong
Kong (+34%), Poland (+32%), and France (+-28%).
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In England, Doll said, the reduction in lung cancer deaths in
younger aged men probably was due to lower tar yields, not to
lower cigarette consumption. "Differences in the trends in tar
delivery are, I suspect, major contributors to the differences
between the two groups of countries," he said. "Certainly, there
has been very much less reduction in Czechoslovakia, Hungary and
Poland, where the average delivery has remained above 20 milli-
grams (mg), and in France, where it remained above 20 mg until
recently, than there has been in Australia, England and Wales,
and the U.S.A."
(The above figures are for men, Doll said, but broadly similar
trends exist for women.)
(Doll and JULIAN PETO, Institute -of Cancer Research, Sutton,
UK, have written an editorial in the October issue of the "Bri-
tish Journal of Cancer" in which they say that the evidence sup-
porting an association between passive smoking and lung cancer is
consistent with an increased risk of 20-30%.)
.
2. In an aftei^noon session on the last day of the meeting,
HILDEGARD SCHULLER- of the University of Tennessee in Knoxville
offered a theory as to how cigarette smoking may induce small
cel l 1 ung cancer ( SCLC ): 'The carbon monoxide ( CO ) in -the . smoke -+.
creates an oxygen..imbalance in the lung that.leads.to an,.-influx
. of endocrine cells, which.rarely are,found:,.in.the,lung. Nitr.osa=
; mines in the-smoke activate the endocrine cells,.;reactive metabo=
Glites are::;formed ,, and the- cells';.eventual.ly,.,ar,e,,.:..tra,n,sf..o.rmed into":,,
t$C.[.C-- a
Schuller said she developed her theory after experiments in
which she used#nitrosodiethylamine -°(DEN),~ a tobacco carcinogen,4
in various human lung cancer cell lines and in hamsters. She was
withholding details, she said, because the work is to appear soon
in "Cancer-Research." (She's previously reported data saying~'.DEN"#'
given to hamsters. induced-,pulmonary adenocarcinomas derived,;fromt;'
C1'a"ra-ce11s.;She's been using this model for several years.) ,
In the hamster part of her work, the animals were given DEN
and exposed to CO in an oxygen chamber. All the animals died in
about 8 weeks. Their lungs had "lots of tumors" as well as hemor-
rhages; the tumors were composed of pulmonary endocrine cells.
At the outset, Schuller said that aidous',~4~ce11~
. . . _. w . ,.. ..,, -,,-. . _, ... r. . .
~ano'.er~.~:atidN>SCLG,,"t`were=-.ths~'wmost~.~~QAu'ep~~:tYpea~,,o~~'"liup~~:'rCancer,~ in:~
r .c }
t he U':S, ~zY S~nG:e ~ t.hP n,~'~: hp$4.bStg C'pulmooerYX ;~ad~no9 ~F;ctnomas ; ,hav"e
become# the most ~T.fr.equent~,.typipkpf.~_0 lyng'3;mal~gnan,cy;~ M okers;y~;she ~
.. .
Esai,,dy5 ;~thile ,sq~amous:': Garlcer:o l~as~.;d.eCr.erased~iny incid,ence;~ ~'a,hd~'SCLCeti,
Ehas,recn~ined ,.at~+:i^about~t,he,~.sameslevel;..~Later, .an1it~gdthat '
. , .. ~ +s .Y +M M w, . .
~~LC~,was~ ~rare~in, kiuinans"~'arid~~irik~c~omestio4;and~experimental-animal`s.
Schuller is planning further experiments in which the levels
of CO and oxygen to which the DEN-treated hamsters are exposed
can be adjusted so as to control the influx of pulmonary endo-
crine cells. She wants to give the animals SCLC and keep them
,

~. -. ..
6.
,
I
alive to see if metastases develop.
She worries "a great deal" about the so-called "safe" ciga-
rettes, Schuller said, because smokers compensate by smoking more
of them. While these cigarettes have lower levels of polycyclic
aromatic hydrocarbons, they still contain carcinogenic nitrosa-
mines.
3. Lung cancer in females may be more dependent on endogenous
factors than is lung cancer in males, according to a hypothesis
advanced by scientists at the University of Saskatchewan in-Sas-
katoon, Canada. Data from questionnaires answered by 927 lung
cancer patients (742 males, 233 females) or their relatives and
from the local tumor registry, persuaded D.J. KLAASSEN and
colleagues to theorize that females may be more susceptible to
the hazards of smoking than men.
A poster report noted that females were diagnosed at an earli-
er mean age than were men, a finding consistent for each major
histologic type ofg lung cancer. Of the females, 42% were diag-
nosed before age 60; the figure for males was 25.6%.
Female patients were significantly more likely to be nonsmok-
ers than were male patients. Among current smokers, the females
began smoking at an older age, and smoked fewer years and fewer
cigarettes daily than did male patients.
The females had more lung adenocarcinomas and fewer squamous
cell lung cancers than did the males. Very few female patients
were exposed to known or suspected carcinogens or pulmonary ir-
ritants at work or elsewhere.
4. ROLAND GRAFSTROM of Stockholm's Karolinska Institute repor-
ted that aldehydes in tobacco smoke caused various cytotoxic and
genotoxic effects in cultures of human bronchial epithelial cells
(HBE) and fibroblasts.
Of the aldehydes tested, ~;ae,rolein' was the most cytotoxic in
regard to HBE survival and also had potent adverse effects on
fibroblasts.
Generally speaking, the experiments undertaken by Grafstrom
and others (a coauthor was CURTIS HARRIS, National Cancer Insti-
tute, Bethesda, MD) showed a variety of adverse reactions induced
by the aldehydes tested. These included genotoxic endpoints such
as mutations, DNA single strand breaks, DNA protein crosslinks,
DNA interstrand breaks, and inhibition of DNA repair.
Many of the effects were qualitatively and quantitatively
similar in cells derived from human bronchus, buccal mucosa or
skin. ` _
The results, Grafstrom said, show (t.~'tb~a~cc~o'~*sinoke:dza'I`dehyde
r y' ._h.~
~e~cer~`~a+.Var~.e,t ofi:eff6ct~sr;,"t`tiat'- relate:r to,;;mGlti.s_tagq,,Cari,cinogen=,j
.

esis in HBE.
He noted that aldehydes also occur in vehicular exhaust and in
various occupational sources.
5. Richard Peto, in the talk given for him by Doll, cast_part
of his comments in the form of advice to Britain's national
health authorities -on how to reduce smoking in England. A good
part of the paper was a repeat of material from the lengthy re-
port he and _Doll wrote several years ago, primarily"on the U.S.
situation. _
Smoking is the "overwhelming" factor in human cancer, he said,
and causes about one-third of all cancer deaths in the U.K. and
the U.S. The figure for the European Economic Community is 25%
and "rising fast." Next in importance is alcohol, which is re-
sponsible for about 3% of all deaths. Smoking causes additional
deaths as a result of heart disease and lung ailments.
Priorities should be established for decreasing the hazards in
cigarettes and reducing cigarette consumption. The authorities
must make adults "confidently" aware of the risk of smoking:
about one-fourth of smokers will die six years earlier than they
would die if they didn't smoke. There's almost nothing else that
is "remotely comparable" in importance to the smoking problem.
Peto decried media coverage of "minor" pollutants, saying it
detracts from public attention to true cancer-causing agents such
as cigarette smoke. New chemicals are being introduced but are
being properly controlled. Also, news reports about significant
findings from experimental cancer research lead the public to
think that smoking is just one of many causes of the disease.
As for diet, there's no conclusive evidence regarding nutri-
tion and cancer. The protective or preventive effect of vitamins
is not supported by valid studies. Many current dietary recommen-
dations are based on incomplete data. Nutrition fads should be
avoided.
(At this session, L. HARDELL of University Hospital in Umea,
Sweden, gave a paper in which he discussed various environmental
carcinogens, among them dioxin ("Agent Orange"). He accused Doll
of "selling out" for having said, apparently recently, that diox-
in was not harmful. Doll did not respond.) ,
6. "Penetration of a tobacco carcinogen across oral mucosa in
the presence of ethanol" was the title of a poster presentation
by C.A. SQUIER, University of Iowa, Iowa City. It claimed there
was evidence for a synergistic effect between tobacco and alcohol
in the_development of oral cancer, but that the reason for the
effect was unclear. A po'ssible explanation is that alcohol en-
hances the penetration of carcinogens across the oral tissue.
v =
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.
To study this possibility, measurements were made of the per-
meability of porcine oral mucosa to a tobacco-derived carcinogen,

8.
nitrosonornicotine (NNN), in the presence of 5% or 50% alcohol.
Three regions of oral tissue were used -- gingiva, floor of
mouth and buccal cavity; they represented 83 specimens from 16
pigs. Radiolabeled NNN was used in a solution that contained
nicotine; the concentrations approximated those found at the
mucosal surface of a tobacco user. - -
The penetration of NNN across oral mucosa was found not to be
significantly changed in the presence of 50% alcohol. However,
there was a significant increase in the permeability of gingiva
and floor of mouth mucosa, but not buccal mucosa, in the presence
of 5% alcohol. This increase occurred after far shorter exposures
(1-2 hours) for floor of mouth mucosa than for gingiva (12-20
hours).
The findings suggest that 5% alcohol may act as a vehicle for
the transport of tobacco carcinogens across oral mucosa. The
findings are in accord with epidemiologic studies showing that
the floor of the mou.th is a high risk area for oral cancer.and
that there is an increased relative risk of oral cancer for heavy
smokers and drinkers. The latter statement applies particularly
to those individuals who drink beverages with a low alcohol con-
tent, such as beer and wine.
7. A poster from scientists at the American Health Foundation
in Valhalla, NY, reported studies in which cancers were induced
in rats by the use of smokeless tobacco. The authors were A.
RIVENSON, DIETRICH HOFFMANN and STEPHEN HECHT.
Ninety-one rats were treated surgically to create a canal in
the lower lip. The canal was filled 5 times a week for 28 months
with either snuff powder (30 rats), snuff enriched with its own
water extract (30 rats) or the extracted residue of snuff (21).
The remaining 10 animals served as a control group for monitoring
the effects of surgery only.
The results: Rats treated with-snuff had 1 squamous cell can-
cer:-. of the oral cavity,,, 1 squamous cell papilloma of the hard
palate and 1 meningioma. Treatment with enriched snuff caused 1
squamous cell papilloma of the floor of the mouth and 1 nasal
olfactory tumor. Treatment with extracted snuff induced 1 squa-
mous cell papilloma of the hard palate. The controls had no tu-
mors.
In a parallel study, rats were treated daily for 30 months by
swabbing the oral cavity with either a water extract of snuff (30
rats), snuff enroched with two tobacco-deried nitrosamines (30),
water containing the two nitrosamines (30), or water (21). In the
group treated with the nitrosamines, 8/30 rats had oral tumors
and C/30 had lung cancers. The incidence of tumors in the other
groups was not significant compared to controls.
A!-
.,
8. "Effects
tract tumors,
of cigarette smoke and vitamin C on respiratory
oral leukoplakia and costochondral hyperplasia N
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induced by diethylnitrosamine (DEN) in hamsters" -- TAKANORI
HARADA, Mitsukaido Laboratories, Tokyo.
This poster described an experiment in which male Syrian
golden-hamsters receiving 12 weekly subcutaneous injections of
DEN-were subjected to cigarette smoke inhalation and maintained
on a diet with or without 1% vitamin C_ supplement for 58 weeks.
Various types of respiratory tract- tumors, oral leukoplakic
lesions and costochondral (relating to -rib- cartilage) hype.rplasia
were found in the DEN-treated animals.=The incidence of tumors in
the nasal cavity, larynx and trachea= and of oral leukoplakic
lesions was significantly higher in the smoke-exposed hamsters
than in the control animals.
Hamsters that got the vitamin C supplement had significantly
lower incidences of nasal cavity tumors and oral leukoplakic
lesions and showed much earlier appearance of the tracheal tumors
than did the smoke-exposed animals without the vitamin supple-
ment. Also, appiearance of the costochondral hyperplasia 'was
significantly earlier and the incidence was higher in the vitamin
C-supplemented hamsters.
The findings indicate that the induction of upper respiratory
tract tumors and oral leukoplakic tumors by DEN could be provoked
by cigarette smoke and that the provoking effect on the develop-.
ment of nasal cavity tumors and oral leukoplakic lesions might be
inhibited by vitamin C. However, the occurrence of tracheal tu-
mors and costochondral hyperplasia seemed to be accelerated by
vitamin C supplement.
9. OSCAR AUERBACH, Veterans Administration Medical Center,
East Orange, NJ, was lead author of a poster on histologic type
of lung cancer and asbestos exposure. One of the coauthors was
LAWRENCE GARFINKEL, chief statistician of the American Cancer
Society. Neither man was at the meeting._
The histologic types of lung cancer in 747 men and 107 women
from three hospitals and one international study of insulation
workers were evaluated. About half the cases were diagnosed from
surgical slides and the other half from autopsy slides. Of these,
196 had asbestos exposure.
Squamous cell cancer constituted the largest percentage of
tumor types and was found with the same frequency in exposed *and
nonexposed groups. Small cell carcinoma was found in 25% of as-
bestos-exposed patients and in 15% of the nonexposed patients.
Upper lobes of the lungs were involved in about two-thirds of
the c-ases with asbestos exposure and lower lobes in the other
third. Little difference was found in histologic type in cases
regardless of whether upper or lower loves were involved.
Cigarette smokers who smoked until their cancers were diag-
nosed showed no difference in histologic type by amount smoked
.1
h
~
0
Ln
~
0
N
N
~
1o

10.
,
and slight but not statistically significant
former smokers.
differences from
10. Nigel Gray of Australia and MICHAEL KUNZE, professor of
community and social medicine at the University of Vienna, co-
chaired the session at which Doll spoke about passive smoking.
There-were other speakers at the session,.which was on "Smoking
or Health: the-Role of Cancer Societies."
A. CALUM MUIR, 'of the International Agency for Research on
Cancer, Lyon,--France, spoke on cancers other than of the lung
that have been associated with tobacco. He discussed smokeless
tobacco and the various forms in which it is used around the
world. Smokeless tobacco, whether prepared commercially or by
"artisans," increases the risk of oral cancer. As many as 400-
million persons use smokeless tobacco (mostly in third world
nations) and the result is an estimated 100,000 cancers in males
and 50,000 in females annually; most of these cancers are in the
oral cavity. +
The tobacco companies, he said, f aced with lower cigarette
sales in developed countries, are now promoting the use of "chew-
ing snuff" in the form of "sachets" for oral use. "If the sale of
these products, which do not carry any health warning, is allowed
to continue, the toll of periodontal disease and oral cancer will
be high."
B. DON ELLIOT HEALD of Atlanta, chairman of the American Can-
cer Society (ACS), said a major U.S. publisher will soon be issu-
ing a stop-smoking program that includes a book and both audio
and video cassettes.
C. The ACS's new executive vice president, G. ROBERT GADBERRY
(he recently succeeded Lane Adams), said the U.S. tobacco indus-
try was spending $2-billion annually in advertising-promotion. At
one point, he said there "may be asmany as 500,000 tobacco
deaths each year (in the U.S.)."
D. Kunze, who has long been involved in the UICC's smoking
control program (headed by Gray), said such programs cannot
succeed without the direct involvement of political activists.
D. DAVID SIMPSON, head of Britain's Action on Smoking and
Health, gave a brief "how-to-do-it" talk about getting and main-
taining governmental support at every level in order to combat
the "pervasive influence" of the tobacco industry, which is al-
ways inviting politicians to sports and cultural events.
E. KJELL BJARTVEIT of Oslo, architect of Norway's antismoking
program, said smoking was decreasing so strongly in Norwegian
youths`aged 16-20 years, he expected this group will be smoke-
f ree by the year 2000 or soon thereafter.
F. Gray said global antismoking efforts generally are succeed-
ing. Smoking is falling at the rate of about 1% yearly in many
r
