OnCo
termsTerm

Obesity-related cancers (IARC list of 13)

aka Adiposity-related cancers, Body fatness and cancer

Excess body fat is an established cause of at least thirteen cancers, including womb, oesophagus, kidney, liver, bowel, pancreas and postmenopausal breast cancer. It is the second largest preventable cause of cancer after smoking in many countries.

The IARC Handbook Working Group (2016) found sufficient evidence for cancers of the oesophagus (adenocarcinoma), gastric cardia, colon and rectum, liver, gallbladder, pancreas, postmenopausal breast, endometrium, ovary, kidney, meningioma, thyroid and multiple myeloma. Relative risks per 5 kg/m2 range from about 1.1 (breast) to 1.5-1.6 (endometrium, oesophageal adenocarcinoma). Mechanisms: insulin and IGF-1, sex hormones, adipokines and chronic inflammation. Population-attributable fractions are 4-8% of cancers in high-income countries and rising; bariatric surgery cohorts show the risk is at least partly reversible.

Category
Nutrition & lifestyle

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