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Obese Patients With Pancreatic Cancer Have Shorter Survival, Study Finds

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Posted October 24, 2013

A diagnosis of pancreatic cancer usually carries with it a poor prognosis, and the news may be even worse for those who are obese: It could mean dying two to three months sooner than pancreatic cancer patients of normal weight, new research shows.

Prior studies have tied obesity to a higher chance of getting pancreatic cancer, but the new study asked whether the disease affects the tumor’s aggressiveness and the patient’s overall survival.

“[The new research] adds to the growing body of evidence that obesity is linked to cancer,” said Dr. Smitha Krishnamurthi, an associate professor of medicine at the Case Western Reserve University School of Medicine.

The study was published Oct. 21 in the Journal of Clinical Oncology. Krishnamurthi was not involved in the new study, but did write a related journal commentary.

Because it is so often asymptomatic and is detected late, pancreatic cancer remains one of the most deadly tumor types. According to the American Cancer Society, more than 45,000 people will be diagnosed with the disease this year, and it will claim over 38,000 lives.

In the new study, a team led by Dr. Brian Wolpin, an assistant professor of medicine at the Dana-Farber Cancer Institute and Harvard Medical School, collected data on more than 900 patients with pancreatic cancer who took part in either the Nurses’ Health Study or the Health Professionals Follow-Up Study. These patients were diagnosed during a 24-year period, the researchers said.

After diagnosis, the patients lived for an average of only five months. Normal-weight patients, however, lived two to three months longer than obese patients, the researchers found.

This association remained strong even after the researchers took into account factors such as age, sex, race, ethnicity, smoking and the stage of the cancer at diagnosis. The study did not, however, prove a cause-and-effect relationship between weight and length of survival.

Read more at: MedlinePlus

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