Affects of Weight on Cancer
Being overweight increases blood levels
of certain hormones and proteins, such as estrogen and insulin, which
can stimulate tumors. Weight affects the risk of cancers in organs, such
as the esophagus, colon, liver and gallbladder, as well as gender-specific
sites such as the breast, ovaries, cervix in women and the prostate gland
in men.
In a recent study, Dr. Jeffrey Meyerhardt,
of the Dana-Farber Cancer Institute in Boston, and his colleagues looked
at the link between body mass index - a ratio of height and weight - and
colon cancer in 3,759 men and women who'd been diagnosed with the disease.
Obese women - those with a BMI was at least 30 - were about a third more
likely than their normal-weight peers to die within roughly nine years
of starting the study. But weight wasn't a factor in survival or return
tumors for men, the researchers found.
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