Description: MONDAY, Nov. 12 (HealthDay News) -- In another sign that too much weight spells health problems, new research suggests that fat men are twice as likely to die after being diagnosed with prostate cancer than men of normal weight.

The research doesn't confirm a cause-and-effect link between obesity and a higher risk of death from prostate cancer, and it's not clear if losing weight would help patients after they're diagnosed with the disease.

Still, "if you look down the list of factors that are most predictive of a bad outcome, this [excess weight] ranks up there pretty high," said study co-author Dr. Matthew R. Smith, an oncologist at Massachusetts General Hospital in Boston.

According to the Prostate Cancer Foundation, the disease strikes one in six American men and is the most prevalent form of non-skin cancer in the United States. Risk rises with age, with more than 65 percent of all cases diagnosed in men over the age of 65.

However, prostate cancer can successfully be