Neoplasms

Researchers identify possible explanation for link between exercise & improved prostate cancer outcomes
Men who walked at a fast pace prior to a prostate cancer diagnosis had more regularly shaped blood vessels in their prostate tumors compared with men who walked slowly, providing a potential explanation for why exercise is linked to improved outcomes for men with prostate cancer, according to results presented here at the AACR-Prostate Cancer Foundation Conference on Advances in Prostate Cancer Research, held Jan. 18-21.

Men who engage in higher levels of physical activity have been reported to have a lower risk of prostate cancer recurrence and mortality compared with men who participate in little or no physical activity. The biological mechanisms underlying this association are not known. Eurekalert!

Melatonin may lower prostate cancer risk
Of the study participants, 111 men were diagnosed with prostate cancer, including 24 with advanced disease. The researchers found that men whose 6-sulfatoxymelatonin levels were higher than the median value had a 75 percent decreased risk for advanced prostate cancer. A 31 percent decreased risk for prostate cancer overall was observed as well, but this finding was not statistically significant. Eurekalert!

Insufficient evidence for low-dose CT lung CA screening
In contrast to a recommendation from the U.S. Preventive Services Task Force (USPSTF), the American Academy of Family Physicians (AAFP) has concluded that there is currently insufficient evidence to recommend screening for lung cancer with low-dose computed tomography (CT) among high-risk individuals. MedicalXpress