Tag Archives: life

Low-grade prostate cancers may not become aggressive with time — adds support for ‘watch and wait’ approach

Researchers found that after the introduction of widespread prostate-specific antigen (PSA) screening, the proportion of patients diagnosed with advanced-stage cancers dropped by more than six-fold in 22 years, but the proportion diagnosed with high Gleason grade cancers did not change substantially. This suggests that low-grade prostate cancers do not progress to higher grade over time. Cancer stage refers to the extent or spread of the disease, and cancer grade, called Gleason grade for prostate cancer, refers to the aggressiveness of the disease…

What causes a small, benign polyp to develop into severe invasive bladder cancer?

Some people develop invasive bladder cancer, which is where the cancer has grown through the muscle layer of the bladder. When this occurs, there is a higher risk that the cancer will spread to other areas of the body and it is much more difficult to treat…

Soy protein supplementation does not reduce risk of prostate cancer recurrence after radical prostatectomy, study finds

"Prostate cancer is the most frequently diagnosed malignancy and the second most frequent cause of male cancer death in the United States and other Western countries but is far less frequent in Asian countries. Prostate cancer risk has been inversely associated with intake of soy and soy foods in observational studies, which may explain this geographic variation because soy consumption is low in the United States and high in Asian countries," according to background information in the article. "Although it has been repeatedly proposed that soy may prevent prostate cancer development, this hypothesis has not been tested in randomized studies with cancer as the end point. A substantive fraction (48 percent — 55 percent) of men diagnosed as having prostate cancer use dietary supplements including soy products, although the exact proportion is not known…

Cancer is a result of a default cellular ‘safe mode,’ physicist proposes

In this month’s special issue of Physics World devoted to the "physics of cancer," Paul Davies, principal investigator at Arizona State University’s Center for Convergence of Physical Sciences and Cancer Biology, explains his radical new theory. Davies was brought in to lead the centre in 2009 having almost no experience in cancer research whatsoever. …

Observation is safe, cost-saving in low-risk prostate cancer, study suggests

Writing in the June 18 issue of the Annals of Internal Medicine, the authors said their statistical models showed that "observation is a reasonable and, in some situations, cost-saving alternative to initial treatment" for the estimated 70 percent of men whose cancer is classified as low-risk at diagnosis. The researchers, led by Julia Hayes, MD, a medical oncologist in the Lank Center for Genitourinary Oncology at Dana-Farber, said their findings support observation — active surveillance and watchful waiting — as a reasonable and underused option for men with low-risk disease. "About 70 percent of men in this country have low-risk prostate cancer, and it’s estimated that 60 percent of them are treated unnecessarily" with various forms of radiation or having the disease removed with radical prostatectomy surgery, said Hayes, who is also a senior scientist at MGH’s Institute for Technology Assessment. …