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Breast Care (Basel). 2014 Apr;9(4):277-81. doi: 10.1159/000365951.

Metabolic syndrome and breast cancer: is there a link?

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1
Else Kröner-Fresenius-Center for Nutritional Medicine, Klinikum rechts der Isar, Technical University Munich, Germany.

Abstract

Epidemiological data suggest a close link between obesity and breast cancer, the most frequently occurring cancer in women. The metabolic syndrome is typically associated with abdominal obesity and comprises disturbances in glucose and/or lipid metabolism and/or hypertension. Recent studies have established a specific association between the metabolic syndrome - as well as its components - and breast cancer, indicating both an increased risk of developing breast cancer and a poorer prognosis. In premenopausal women, obesity might have a protective effect only on receptor-positive tumors, whereas a positive association was observed between obesity/abdominal obesity and an increased risk of triple-negative breast cancer (TNBC). Overall survival and disease-free survival were reported to be significantly shorter in premenopausal obese women with TNBC compared to non-obese women, but these results are still inconsistent and need further research. The metabolic syndrome is characterized by a state of insulin resistance/hyperinsulinemia and subacute chronic inflammation, with both conditions offering a plausible mechanistic link towards breast cancer. Thus, in addition to their increased risk of cardiovascular morbidity and mortality, women with this syndrome represent a group at elevated risk of developing breast cancer and with poorer prognosis.

KEYWORDS:

Abdominal obesity; Breast cancer; Metabolic syndrome; Triple-negative breast cancer (TNBC)

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