(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.
Tumor markers are molecules occurring in blood or tissue that are associated with cancer and whose measurement or identification is useful in patient diagnosis or clinical management.he PSA screening test is a blood test that looks for a specific tumor marker. In general, tumor markers are produced by the tumor itself or by our body in response to the presence of cancer or non-cancerous conditions.