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Prevention
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
This second module, Prevention, provides practical advice for programme managers in charge
of developing or scaling up cancer prevention activities. It shows how to implement cancer
prevention by controlling major avoidable cancer risk factors. It also recommends strategies for
establishing or strengthening cancer prevention programmes.
Using this Prevention module, programme managers in every country, regardless of resource
level, can confi dently take steps to curb the cancer epidemic. They can save lives and prevent
unnecessary suffering caused by cancer.
The World Health Organization estimates that 7.6 million people died of cancer in
2005 and 84 million people will die in the next 10 years if action is not taken.
More than 70% of all cancer deaths occur in low and middle income countries,
where resources available for prevention, diagnosis and treatment of cancer are
limited or nonexistent.
Yet cancer is to a large extent avoidable. Over 40% of all cancers can be prevented.
Some of the most common cancers are curable if detected early and treated. Even with
late cancer, the suffering of patients can be relieved with good palliative care.
Cancer control: knowledge into action: WHO guide for effective
programmes is a series of six modules offering guidance
on all important aspects of effective cancer
control planning and implementation.
ISBN 92 4 154711 1
Prevention
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
WHO Library Cataloguing-in-Publication Data
Prevention.
(Cancer control : knowledge into action : WHO guide for effective programmes ; module 2.)
1.Neoplasms – prevention and control. 2.Health planning. 3.National health programs – organization and administration. 4.Health policy. 5.Guidelines. I.World Health
Organization. II.Series.
ISBN 92 4 154711 1 (NLM classifi cation: QZ 200)
© World Health Organization 2007
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for noncommercial distribution – should be addressed to WHO Press, at the above address (fax: +41 22 791 4806; e-mail: permissions@who.int).
The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the World
Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.
Dotted lines on maps represent approximate border lines for which there may not yet be full agreement.
The mention of specifi c companies or of certain manufacturers’ products does not imply that they are endorsed or recommended by the World Health Organization
in preference to others of a similar nature that are not mentioned. Errors and omissions excepted, the names of proprietary products are distinguished by initial
capital letters.
All reasonable precautions have been taken by the World Health Organization to verify the information contained in this publication. However, the published material
is being distributed without warranty of any kind, either expressed or implied. The responsibility for the interpretation and use of the material lies with the reader. In
no event shall the World Health Organization be liable for damages arising from its use.
The Prevention module of the Cancer Control Series is a joint effort of the following departments at WHO headquarters:
Chronic Diseases and Health Promotion; Ethics, Trade, Human Rights and Law; Immunization, Vaccines and Biologicals; Immunization, Vaccines and
Research; Measurement and Health Information Systems; Mental Health and Substance Dependence; Public Health and Environment and the Tobacco Free
Initiative; and also the WHO International Agency for Research on Cancer, Lyon, France.
The Prevention module was produced under the direction of Catherine Le Galès-Camus (Assistant Director-General, Noncommunicable Diseases and Mental Health),
Robert Beaglehole (Director, Chronic Diseases and Health Promotion), Serge Resnikoff (Coordinator, Chronic Diseases Prevention and Management) and Cecilia Sepúlveda
(Chronic Diseases Prevention and Management, coordinator of the overall series of modules).
Andreas Ullrich (Chronic Diseases Prevention and Management) was the coordinator for this module and provided extensive editorial input.
Editorial support was provided by Anthony Miller (scientifi c editor), Inés Salas (technical adviser), Angela Haden (technical writer and editor) and Paul Garwood (copy editor).
Proofreading was done by Ann Morgan.
The production of the module was coordinated by Maria Villanueva.
Core contributions for the module were received from the following WHO staff:
Teresa Aguado, Antero Aitio, Timothy Armstrong, Annemieke Brands, Alexander Capron, Zhanat Carr, Felicity Cutts, Poonam Dhavan, JoAnne Epping-Jordan,
Kathleen Irwin, Ivan Dimov Ivanov, Ingrid Keller, Colin Mathers, Yumiko Mochizuki, Isidore Obot, Armando Peruga, Vladimir Poznyak, Eva Rehfuss, Dag Rekve,
Heide Richter-Airijoki, Craig Shapiro, Kurt Straif (IARC), Kate Strong, Angelika Tritscher, Colin Tukuitonga, Andreas Ullrich, Emilie van Deventer, Steven Wiersma
and Hajo Zeeb.
Valuable input, help and advice were received from a number of people in WHO headquarters throughout the production of the module: Caroline Allsopp, David Bramley,
Raphaël Crettaz, Maryvonne Grisetti and Rebecca Harding.
Cancer experts worldwide, as well as technical staff in WHO headquarters and in WHO regional and country offi ces, also provided valuable input by making contributions
and reviewing the module, and are listed in the Acknowledgements.
Design and layout: This document’s design is based on the Chronic Diseases and Health Promotion Department Style Guide developed by Reda Sadki, Paris, France.
Further design and layout by L’IV Com Sàrl, Morges, Switzerland.
Printed in Switzerland
More information about this publication can be obtained from:
Department of Chronic Diseases and Health Promotion
World Health Organization
CH-1211 Geneva 27, Switzerland
The production of this publication was made possible through the generous fi nancial support of the National Cancer Institute (NCI), USA,
and the National Cancer Institute (Institut national du cancer, INCa), France. We would also like to thank the Public Health Agency of
Canada (PHAC), the National Cancer Center of Korea (NCC), the International Atomic Energy Agency (IAEA) and the International Union
Against Cancer (UICC) for their fi nancial support.
Cancer is a leading cause of death globally. The World Health Organization
estimates that 7.6 million people died of cancer in 2005 and 84 million people
will die in the next 10 years if action is not taken. More than 70% of all cancer
deaths occur in low- and middle-income countries, where resources available for
prevention, diagnosis and treatment of cancer are limited or nonexistent.
But because of the wealth of available knowledge, all countries can, at some
useful level, implement the four basic components of cancer control – prevention,
early detection, diagnosis and treatment, and palliative care – and thus avoid
and cure many cancers, as well as palliating the suffering.
Cancer control: knowledge into action, WHO guide for effective programmes is
a series of six modules that provides practical advice for programme managers
and policy-makers on how to advocate, plan and implement effective cancer
control programmes, particularly in low- and middle-income countries.
Cancer is to a large extent avoidable. Many cancers
can be prevented. Others can be detected early in their
development, treated and cured. Even with late stage
cancer, the pain can be reduced, the progression of the
cancer slowed, and patients and their families helped
to cope.
iii
Series overview
Cancer Control Series
Introduction to the
6
Prevention
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
PREVENTION
a practical guide for programme
managers on how to implement
effective cancer prevention by
controlling major avoidable cancer
risk factors.
Early Detection
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
EARLY DETECTION
A practical guide for programme
managers on how to implement
effective early detection of major
types of cancer that are amenable
to early diagnosis and screening.
Diagnosis and
Treatment
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
DIAGNOSIS AND TREATMENT
A practical guide for programme
managers on how to implement
effective cancer diagnosis and
treatment, particularly linked to
early detection programmes or
curable cancers.
Palliative Care
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
PALLIATIVE CARE
A practical guide for programme
managers on how to implement
effective palliative care for
cancer, with a particular focus on
community-based care.
Policy and
Advocacy
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
POLICY AND ADVOCACY
A practical guide for medium level
decision-makers and programme
managers on how to advocate for
policy development and effective
programme implementation for
cancer control.
The WHO guide is a response to the World Health Assembly
resolution on cancer prevention and control (WHA58.22), adopted
in May 2005, which calls on Member States to intensify action
against cancer by developing and reinforcing cancer control
programmes. It builds on National cancer control programmes:
policies and managerial guidelines and Preventing chronic
diseases: a vital investment, as well as on the various WHO
policies that have infl uenced efforts to control cancer.
Cancer control aims to reduce the incidence, morbidity and mortality
of cancer and to improve the quality of life of cancer patients in
a defi ned population, through the systematic implementation
of evidence-based interventions for prevention, early detection,
diagnosis, treatment, and palliative care. Comprehensive cancer
control addresses the whole population, while seeking to respond
to the needs of the different subgroups at risk.
COMPONENTS OF CANCER
CONTROL
Prevention of cancer, especially when integrated with the
prevention of chronic diseases and other related problems (such
as reproductive health, hepatitis B immunization, HIV/AIDS,
occupational and environmental health), offers the greatest
public health potential and the most cost-effective long-term
method of cancer control. We now have suffi cient knowledge to
prevent around 40% of all cancers. Most cancers are linked to
tobacco use, unhealthy diet, or infectious agents (see Prevention
module).
Early detection detects (or diagnoses) the disease at an
early stage, when it has a high potential for cure (e.g. cervical
or breast cancer). Interventions are available which permit the
early detection and effective treatment of around one third of
cases (see Early Detection module).
There are two strategies for early detection:
• early diagnosis, often involving the patient’s awareness of
early signs and symptoms, leading to a consultation with
a health provider – who then promptly refers the patient
for confi rmation of diagnosis and treatment;
• national or regional screening of asymptomatic and
apparently healthy individuals to detect pre-cancerous
lesions or an early stage of cancer, and to arrange referral
for diagnosis and treatment.
iv
Planning
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
PLANNING
A practical guide for programme
managers on how to plan overall
cancer control effectively,
according to available resources
and integrating cancer control
with programmes for other chronic
diseases and related problems.
A series of six modules
Treatment aims to cure disease, prolong life, and improve
the quality of remaining life after the diagnosis of cancer is
confi rmed by the appropriate available procedures. The most
effective and effi cient treatment is linked to early detection
programmes and follows evidence-based standards of care.
Patients can benefi t either by cure or by prolonged life, in cases
of cancers that although disseminated are highly responsive
to treatment, including acute leukaemia and lymphoma. This
component also addresses rehabilitation aimed at improving the
quality of life of patients with impairments due to cancer (see
Diagnosis and Treatment module).
Palliative care meets the needs of all patients requiring relief
from symptoms, and the needs of patients and their families for
psychosocial and supportive care. This is particularly true when
patients are in advanced stages and have a very low chance of
being cured, or when they are facing the terminal phase of the
disease. Because of the emotional, spiritual, social and economic
consequences of cancer and its management, palliative care
services addressing the needs of patients and their families, from
the time of diagnosis, can improve quality of life and the ability
to cope effectively (see Palliative Care module).
Despite cancer being a global public health problem, many
governments have not yet included cancer control in their
health agendas. There are competing health problems, and
interventions may be chosen in response to the demands of
interest groups, rather than in response to population needs or
on the basis of cost-effectiveness and affordability.
Low-income and disadvantaged groups are generally more
exposed to avoidable cancer risk factors, such as environmental
carcinogens, tobacco use, alcohol abuse and infectious agents.
These groups have less political infl uence, less access to health
services, and lack education that can empower them to make
decisions to protect and improve their own health.
• Leadership to create clarity and unity of
purpose, and to encourage team building,
broad participation, ownership of the
process, continuous learning and mutual
recognition of efforts made
• Involvement of stakeholders of all
related sectors, and at all levels of the
decision-making process, to enable active
participation and commitment of key
players for the benefi t of the programme.
• Creation of partnerships to enhance
effectiveness through mutually benefi cial
relationships, and build upon trust and
complementary capacities of partners
from different disciplines and sectors.
• Responding to the needs of people
at risk of developing cancer or already
presenting with the disease, in order
to meet their physical, psychosocial and
spiritual needs across the full continuum
of care.
• Decision-making based on evidence,
social values and effi cient and cost-
effective use of resources that benefi t the
target population in a sustainable and
equitable way.
• Application of a systemic approach
by implementing a comprehensive
programme with interrelated key
components sharing the same goals and
integrated with other related programmes
and to the health system.
• Seeking continuous improvement,
innovation and creativity to maximize
performance and to address social and
cultural diversity, as well as the needs
and challenges presented by a changing
environment.
• Adoption of a stepwise approach
to planning and implementing
interventions, based on local
considerations and needs.
(see next page for WHO stepwise
framework for chronic diseases
prevention and control, as applied to
cancer control).
v
Series overview
BASIC PRINCIPLES OF CANCER CONTROL
PLANNING STEP 1
Where are we now?
1
Investigate the present state of the
cancer problem, and cancer control
services or programmes.
WHO stepwise framework
vi
PLANNING STEP 2
Where do we want to be?
2
Formulate and adopt policy. This includes
defi ning the target population, setting
goals and objectives, and deciding on
priority interventions across the cancer
continuum.
PLANNING STEP 3
How do we get there?
3
Identify the steps needed to implement
the policy.
The planning phase is followed by the policy implementation phase.
Implementation step 1
CORE
Implement interventions in the policy that are
feasible now, with existing resources.
Implementation step 2
EXPANDED
Implement interventions in the policy that are
feasible in the medium term, with a realistically
projected increase in, or reallocation of, resources.
Implementation step 3
DESIRABLE
Implement interventions in the policy that are
beyond the reach of current resources, if and when
such resources become available.
Series overview
1
KEY MESSAGES 2
TAKING ACTION TO PREVENT CANCER 4
CANCER RISK FACTORS 7
PLANNING STEP 1: WHERE ARE WE NOW? 10
How to assess risk factors 11
Use risk assessment to identify priorities for action to prevent cancer 15
PLANNING STEP 2: WHERE DO WE WANT TO BE? 16
What works in prevention? 17
PLANNING STEP 3: HOW DO WE GET THERE? 26
Appoint a focal point 27
Select core risk factors and core interventions 28
Control tobacco use 30
Promote a healthy diet and physical activity and the reduction of overweight and obesity 34
Reduce harmful alcohol use 36
Immunize against hepatitis B virus 38
Prepare to immunize against human papilloma virus 39
Reduce exposure to environmental carcinogens 39
Reduce exposure to occupational carcinogens 41
Reduce exposure to radiation 43
CONCLUSION 45
REFERENCES 46
ACKNOWLEDGEMENTS 48
PREVENTION MODULE CONTENTS
1
Contents
PREVENTION
2
KEY MESSAGES
Cancer prevention is an essential component of all cancer
control plans because about 40% of all cancer deaths can
be prevented.
p
Important cancer risk factors – such as tobacco use – are also risk factors
for other chronic diseases, including cardiovascular disease and diabetes.
Cancer prevention should, therefore, be planned and implemented in the
context of other chronic disease prevention programmes, as well as in
the context of overall cancer control planning.
p
Gender plays a signifi cant role in exposure to risks.
p
Many effective interventions to reduce cancer risk are appropriate for
resource-constrained settings.
p
Activities that are immediately feasible and likely to have the greatest
impact for the investment should be selected for implementation fi rst.
This is at the heart of a stepwise approach.
p
Monitoring trends in cancer risk factors in the population is important
for predicting the future cancer burden and for rational decision-
making in terms of prioritizing scarce resources.
p
A comprehensive surveillance and evaluation system should be an
integral element of prevention policies and programmes.
p
Regardless of resource level, every country can take steps to curb
the cancer epidemic by undertaking primary prevention actions and
thereby avoid unnecessary suffering and premature death.
3
Key messages
Sridhar Reddy,
52 years old,
India
“
HIS TOBACCO USE AND
DRINKING HABITS
ARE TO BLAME,
”
THE ONCOLOGIST SAYS
Like millions of others in 2005, K. Sridhar Reddy died from a cancer that could have been prevented. Still a young
man at the age of 52, Sridhar left behind his grieving wife and daughter, and also a substantial debt that was
incurred by his treatment costs.
Sridhar chewed tobacco since his teenage years and drank alcohol daily for more than 20 years. “Too much
stress,” Sridhar explained when the photographer came to visit him in hospital. Sridhar had a fi rst malignant
tumour removed from his right check in 2004, and a second one from his throat in 2005. By the time of his
interview, his cancer had spread to his lungs and liver.
Despite being cared for at the renowned Chennai Cancer Institute, Sridhar’s physicians were powerless to cure him.
His cancer was simply too aggressive and sadly, Sridhar died only a short time after he was interviewed.
WHO estimates that 40% of all cancer deaths is preventable. Tobacco use and harmful alcohol use are among the
most important risk factors for the disease.
Source: adapted from Preventing chronic diseases: a vital investment, World Health Organization, 2005. Photo © WHO/Chris de Bode.
[...]... together responsible for 274 000 cancer deaths per year; harmful alcohol use – responsible for 351 000 cancer deaths per year; sexually transmitted human papilloma virus (HPV) infection – responsible for 235 000 cancer deaths per year; air pollution (outdoor and indoor) – responsible for 71 000 cancer deaths per year; occupational carcinogens – responsible for at least 152 000 cancer deaths per year... alone account for 40% of endometrial (uterus) cancer Overweight, obesity and physical inactivity collectively account for an estimated 159 000 colon and rectum cancer deaths per year, and 88 000 breast cancer deaths per year 7 PREVENTION ALCOHOL USE is a risk factor for many cancer types including cancer of the oral cavity, pharynx, larynx, oesophagus, liver, colorectum and breast Risk of cancer increases... through the WHO Global InfoBase http://infobase .who. int The WHO Regional Office for Europe also maintains an alcohol database http://data.euro .who. int/alcohol/ www HEPATITIS B VIRUS Information about the prevalence of HBV is usually available from in-country sources Links to WHO data sources on the hepatitis B virus include: l Data about hepatitis http://www .who. int/csr/disease/hepatitis/HepatitisB_whocdscsrlyo2002_2.pdf... in order to strengthen national tobacco control, particularly in low- and middle-income countries, including countries with economies in transition Information on the WHO Framework Convention on Tobacco Control is available at http://www .who. int/tobacco/framework 17 PREVENTION There are many cost -effective interventions for tobacco control (World Bank, 1999; WHO, 2004) that can be used in different... causally related to cancer of the lung, bladder, larynx and skin, leukaemia and nasopharyngeal cancer is well documented Mesothelioma (cancer of the outer lining of the lung or chest cavity) is to a large extent caused by work-related exposure to asbestos Occupational cancers are concentrated among specific groups of the working population, for whom the risk of developing a particular form of cancer may be... estimates for risk factors (tobacco use, body mass index, overweight, fruit and vegetable consumption, physical activity, alcohol use) for all chronic diseases including cancer The WHO STEPwise approach to Surveillance (STEPS) is a simple, standardized method for collecting, analysing and disseminating data on the established risk factors for chronic diseases in WHO Member States http://www .who. int/chp/steps/riskfactor/en/index.html... profiles and other information resources regarding cancer prevention and control This information is available at http://www .who. int /cancer/ en 10 www www www Planning step 1 HOW TO ASSESS RISK FACTORS TOBACCO Surveillance mechanisms are required to: p understand tobacco use patterns; p understand the effects of tobacco use in the country; p monitor the impact of tobacco control policies Information is needed...PREVENTION TAKING ACTION TO PREVENT CANCER Cancer prevention is an essential component of the fight against cancer Unfortunately, many prevention measures that are both cost -effective and inexpensive have yet to be widely implemented in many countries Cancer prevention must be considered in the context of activities to prevent other chronic diseases, especially those with which cancer shares common... estimated to cause almost all cases of cervical cancer, 90% of anal cancers and 40% of cancers of the external genitalia HPV also causes cancer of the oral cavity and the oropharynx Of the many HPV genotypes, types 16, 18 and more than 10 other types are causal for cervical cancer The most common high-risk genotypes, 16 and 18, account for about 70% of cervical cancer cases worldwide There is, however, some... consumed The risk from heavy drinking for several cancer types (e.g oral cavity, pharynx, larynx and oesophagus) substantially increases if the person is also a heavy smoker Attributable fractions vary between men and women for certain types of alcohol-related cancer, mainly because of differences in average levels of consumption For example, 22% of mouth and oropharynx cancers in men are attributable to . effective cancer
control planning and implementation.
ISBN 92 4 154711 1
Prevention
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
WHO. the
6
Prevention
Knowledge into Action
Cancer Control
WHO Guide for Effective Programmes
PREVENTION
a practical guide for programme
managers on how to implement
effective
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