Prostate cancer relapse likelihood shown by copy number variation (dailyrx news) the current most widely used test for detecting and monitoring prostate cancer, known as prostate specific antigen (psa), has a lot of room for improvement for detecting new cancers. cheap generic viagra Several new tests are in development to replace psa, trying to be both sensitive to small changes as well as specific to only cancer. A new candidate for replacing psa has shown success in the first extensive trial run in patients. viagra how long until it takes effect Ask your doctor about prostate screening tests. Researchers from the university of pittsburgh documented that the new test diagnosed prostate cancer 75 percent of the time, and correctly predicted relapse 73 percent of the time. The test works by taking cells from a prostate biopsy, and counting the number of abnormalities in the dna, resulting in a number called copy number variation (cnv). Cnv refers to an unusual amount of duplicated areas in the dna, and generally indicates that something has gone wrong in the cell. viagra online Using the cnv from prostate cells, the test correctly predicted 75% of prostate cancers and 73% of cancer relapses. viagra for sale Lead investigator jian-hua luo, md/phd, pathology professor at the university of pittsburgh school of medicine says his results show that this test would be enormously helpful for urologists looking at questionably cancerous prostates by showing the level of abnormality in the dna of the tumor. “for a patient diagnosed with prostate cancer, cnv analysis done on blood or normal tissues would eliminate the need for additional invasive procedures to decide a treatment mode. " for a patient already having a radical prostatectomy, cnv analysis on the tumor or blood sample may help to decide whether additional treatment is warranted to prevent relapse. viagra europe online "despite some limitations, including the need for high quality genome dna, cnv analysis on the genome of blood, normal prostate, or tumor tissues holds promise to become a more efficient and accurate way to predict the behavior of prostate cancer. buy cheap viagra ” dr. buy viagra without prescription Luo hopes to develop his test for commercial use, but further testing, with a larger population, is needed to refine the science. The study used 238 samples from men with abnor. prescription cost viagra 50mg price of viagra tablets in india