(rÄâ²dÃ¤r) 1. A method of detecting distant objects and determining their position, speed, or other characteristics by causing radio waves to be reflected from them and analyzing the reflected waves. The waves can be converted into images, as for use on weather maps.
A high level of the marker may indicate a worsened prognosis in some situations. The most effective and common purpose of tumor markers is to monitor the cancer treatment. As the cancer levels go on decreasing in the body, the marker also goes down. If the marker remains stagnant or increases, it is usually an indication that the patient is not responding sufficiently to the treatment.
Welcome to the board! Several things are well-known for making the PSA level go up or down, and most of the time the PSA level changes it is not due to prostate cancer! Let's start there - with prostate cancer. Prostate cells make PSA, and that does not stop when the cells become cancerous. The reason PSA is a clue to possible prostate cancer is that a lot more PSA gets into the blood, where a blood test can detect it, when there is cancer.