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Aug. 28, 2006 -- ObesityObesity may worsen survival rates for advanced ovarian cancerovarian cancer, doctors report in the journal Cancer.
The doctors included James Pavelka, MD, and Andrew Li, MD, of Cedars-Sinai Medical Center in Los Angeles.
If their finding is correct, it could lengthen the list of possible links between obesity and cancer.
Obesity has already been tied to cancers of the breast, colon, esophagus, kidney, and endometrium (inner uterus lining). Links to ovarian cancer haven't been certain, the researchers note.
They studied the records of 216 women undergoing surgery and treatment for ovarian cancer at Cedars-Sinai Medical Center.
The patients were in their late-50s to mid-60s, on average. They included 146 women with advanced ovarian cancer (stage III or IV ovarian cancer).
Ovarian cancer is hard to spot in its earliest, most treatable stages. That's a big reason why ovarian cancer has the highest death rate of any cancer of a woman's reproductive system.
The doctors checked the women's BMI (body mass index), which relates height to weight.
Among women with advanced ovarian cancer, 89 had normal BMI, 99 were obese or overweight, and 13 were underweight.
Average survival was shorter for overweight or obese women with advanced ovarian cancer.
Overweight and obese women were more likely to have diabetesdiabetes and high blood pressurehigh blood pressure. Extra fat may have made their cancer more aggressive.
"Our study suggests that fat tissue excretes a hormone or protein that causes ovarian cancer cells to grow more aggressively," Li says, in a Cedars-Sinai news release.
More research is needed to confirm that, Li notes.
While the women got similar types of treatment, it's possible that overweight or obese women may have needed higher chemotherapy doses. But that's not certain, due to incomplete records.
SOURCES: Pavelka, J. Cancer, Oct. 1, 2006; vol 107. National Cancer Institute: "A Snapshot of Ovarian Cancer." News release, Cedars-Sinai Medical Center. News release, John Wiley & Sons, Inc.