Posted by Bill Sandweg on 23 August 2011.
PSA (prostate specific antigen) is a test familiar to most men in their middle age and beyond. PSA is a protein which is secreted by the prostate gland in men. A rise in the blood level of PSA may indicate the presence of prostate cancer and warrants further screening.
PSA is also secreted in much smaller concentrations by other organs of the body, including the breast, liver, ovary and lung. According to a study recently published in the journal Analytical Chemistry, researchers used sensitive probes to test for elevated levels of PSA in the blood of women who had been diagnosed with breast cancer and compared the results with levels found in the blood of women who did not have breast cancer. They found that the PSA levels in women with breast cancer were three times higher than in women who did not have breast cancer.
The technology was used on only a small number of samples but does hold promise for the future as another breast cancer screening methodology.