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Diseased gums raise risk of pancreatic cancer
Published in Saudi Press Agency on 13 - 11 - 2006


Gum disease may increase the
risk of developing deadly pancreatic cancer, even among those
who have never smoked, according to research reported today in
Boston at the American Association for Cancer Research's
Frontiers in Cancer Prevention Research Meeting, Reuters reported.
Two previous studies found positive associations between
tooth loss or periodontitis (inflammation of the gums around
the teeth) and pancreatic cancer. However, "residual
confounding" by smoking and other known risk factors may have
accounted for the findings.
To investigate further, Dr. Dominique S. Michaud of Harvard
School of Public Health, Boston and colleagues analyzed 16
years of health data on nearly 52,000 male doctors in the
Health Professionals Follow-up Study. This ongoing study,
initiated in 1986, is looking at lifestyle factors related to
cancer and other chronic diseases.
A total of 216 men developed pancreatic cancer during
follow-up. After factoring out smoking, diabetes, obesity,
physical activity, diet and other potentially confounding
factors, men with a history of gum disease had a 63-percent
higher risk of developing pancreatic cancer relative to men
without periodontal disease.
Never smokers with gum disease fared even worse; "they had
2-fold increased risk in developing pancreatic cancer," Michaud
told a gathering of reporters Monday.
"This is an important finding," Dr. Scott Lippman of The
University of Texas M. D. Anderson Cancer Center in Houston
said, noting that there have been a couple of small reports
that "just dismissed" the gum disease/pancreatic cancer link as
potentially related to smoking, given that smoking increases
the risk of pancreatic cancer.
"This (new) study is the first clearly establishing the
increased risk of pancreatic cancer with periodontal disease,"
regardless of smoking history, Lippman said.
Michaud's team also found that men with gum disease and
recent tooth loss had a 2.7-fold increased risk of developing
pancreatic cancer compared with those who reported neither gum
disease nor tooth loss.
Periodontal disease may boost the risk of pancreatic cancer
through "plausible mechanisms," Michaud and colleagues point
out in meeting materials.
Gum disease results in chronic inflammation over many
years, they explain, and people with gum disease harbor high
levels of harmful bacteria in the mouth and gut and tend to
have higher amounts of cancer-causing nitrosamines.
Pancreatic cancer, the fourth leading cause of death from
cancer death in the United States, is one of the most deadly
cancers, largely because it is often not detected until it has
spread beyond the pancreas. Only about five percent of
pancreatic cancer patients survive the first five years after
being diagnosed.


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