(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 substances that are produced by cancer or by other cells of the body in response to cancer or certain benign (noncancerous) conditions.here is no âuniversalâ tumor marker that can detect any type of cancer. There are some limitations to the use of tumor markers. Sometimes, noncancerous conditions can cause the levels of certain tumor markers to increase.