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Cancer screening and prevention in low-resource settings

Abstract

Less-developed-region countries (LDCs) are seeing a rapid rise in cancer incidence owing to changing lifestyles, infections, environmental carcinogens and increasing longevity. LDCs have poor resources to deal with cancers, leading to high mortality rates. Investment in nationally implementable and sustainable cancer prevention and screening strategies would be more appropriate for LDCs. This Science and Society article outlines the burden of preventable cancers in selected LDCs and discusses evidence on cost-effective and widely implementable prevention and screening strategies.

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Correspondence to Surendra Srinivas Shastri.

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Glossary

α-fetoprotein

(AFP). AFP is a protein found in the blood. It is produced by the liver of the fetus and its level steadily decreases after birth. Raised AFP levels in the blood are indicators of the presence of several diseases, including hepatocellular carcinoma.

Breast self-examination

(BSE). Both breasts are periodically (usually monthly) examined by the subject herself in a systematic manner.

Global Alliance for Vaccines and Immunization

(GAVI). A public–private global health partnership that is committed to increasing access to immunization in poor countries. GAVI has been negotiating with human papillomavirus (HPV) vaccine manufacturers to provide the vaccine to less-developed-region countries (LDCs) at very low costs.

Less-developed-region countries

(LDCs; as defined by the United Nations Population Division, Department of Economic and Social Affairs definition, 2012 revision). All regions of Africa, Asia (excluding Japan), Latin America and the Caribbean, Melanesia, Micronesia and Polynesia.

Level-1 evidence of efficacy

Level-1 A evidence is derived from meta-analysis of randomized controlled trials, and Level-1 B evidence is derived from at least one randomized controlled trial. Grade A recommendations for medical practice are all based on Level 1 evidence.

More-developed-region countries

(MDCs; as defined by the United Nations Population Division, Department of Economic and Social Affairs definition, 2012 revision). All regions of Europe, North America, Australia, New Zealand and Japan.

Opportunistic screening

Also known as case-finding, this is a form of screening that is restricted to patients who consult a health practitioner for some other purpose.

Physical breast examination

(PBE). Both breasts and axillae are thoroughly examined in a systematic manner by a trained health care provider.

Prevalence

The number of persons in a defined population who have been diagnosed with the disease and who are still alive at the end of a given year.

Primary health workers

(PHWs). In LDCs, PHWs are usually state health services employees with some high school education and training in basic management of maternal and child health services and simple interventions for commonly occurring diseases in the community.

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Shastri, A., Shastri, S. Cancer screening and prevention in low-resource settings. Nat Rev Cancer 14, 822–829 (2014). https://doi.org/10.1038/nrc3859

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