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Cancer Health Center

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Cancer Patients Less Likely to Get Alzheimer's?

Risk for malignancy was also lower in seniors with Alzheimer's, researchers report

WebMD News from HealthDay

By Alan Mozes

HealthDay Reporter

WEDNESDAY, July 10 (HealthDay News) -- Gaining insight into two big health concerns, Italian researchers have found that seniors with cancer have a lower risk for Alzheimer's disease and vice versa.

Studying more than 200,000 older adults in northern Italy, the research team concluded that cancer patients bear a 35 percent lower risk for developing Alzheimer's, while people with Alzheimer's have nearly half the risk of getting cancer compared to the general population.

The investigators suggested that the findings could help guide researchers toward better treatments for both illnesses over the long term.

"Practically, our results [indicated that] some genes that have been demonstrated to act in cancer growth and control might also be involved in the [development] of Alzheimer's disease," said study lead author Dr. Massimo Musicco, of the National Research Council of Italy's Institute of Advanced Biomedical Technologies. "And this represents a promising [observation] for the struggle against this devastating neurodegenerative disorder."

For the study, which was published online July 10 in the journal Neurology, the research team spent six years (2004 to 2009) tracking the health status of more than 204,000 Italians aged 60 and older. During that period, nearly 21,500 men and women developed cancer, while more than 2,800 developed Alzheimer's disease.

Although 161 patients developed both diseases, the authors said that known incidence rates among the general population had predicted a higher dual-disease figure.

After crunching the numbers, the team found that having one disease seemed to have a considerable protective effect in terms of lowering the risk for the other.

The researchers also determined that the reduced-risk linkage could not be explained by fatalities from either disease. This meant that a lower risk for developing Alzheimer's could not simply be explained away by the premature death (and therefore shorter lifespan) of cancer patients, or vice versa.

Dr. James Galvin, a professor of neurology, psychiatry, nursing and nutrition at the NYU Langone School of Medicine in New York City, said that the observed linkage between cancer and Alzheimer's, while important, may not apply to less common forms of dementia.

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