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Cancer patterns in Inuit populations.
1Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark.
The Lancet. Oncology
|September 2, 2008
Summary
Cancer patterns in Inuit populations show a unique profile, with high rates of Epstein-Barr virus-associated cancers and increasing lifestyle-linked tumors like lung and breast cancer due to significant societal changes.
Area of Science:
- Epidemiology
- Public Health
- Genetics
Background:
- Inuit populations historically had low cancer rates but experienced increasing life expectancy.
- A distinct cancer profile emerged, featuring high risks for nasopharyngeal and salivary gland carcinomas (Epstein-Barr virus-associated) and low risks for prostate, testis, and hematopoietic cancers.
- Both genetic predispositions and environmental factors contribute to these observed cancer patterns.
Purpose of the Study:
- To review current knowledge on cancer epidemiology among Inuit populations.
- To highlight characteristic Inuit cancer types and their epidemiological trends.
- To explore the influence of genetic and environmental factors on cancer incidence.
Main Methods:
- Review of existing epidemiological studies and literature on cancer in Inuit populations.
- Analysis of cancer incidence patterns in relation to demographic and lifestyle changes.
- Examination of the role of Epstein-Barr virus and other etiological factors.
Main Results:
- Inuit populations exhibit a unique cancer epidemiology, differing significantly from Western populations.
- A notable increase in lifestyle-associated cancers (lung, colon, breast) has been observed, linked to changes in smoking, diet, and reproductive behaviors.
- Epstein-Barr virus-associated cancers of the nasopharynx and salivary glands are disproportionately high.
Conclusions:
- Cancer epidemiology in Inuit populations is shaped by a complex interplay of genetic factors and profound lifestyle shifts.
- Environmental and lifestyle changes, particularly post-mid-20th century, have significantly impacted cancer risk profiles.
- Understanding these unique patterns is crucial for targeted cancer prevention and control strategies in circumpolar communities.
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