21. Participants will receive annual digital rectal exams and prostate-specific antigen ( PSA ) screenings. 22. Some screening protocols are currently not accurate ( such as prostate-specific antigen testing ). 23. To monitor progression of their disease, Ornish conducts prostate-specific antigen screening every three months. 24. Only the level of prostate specific antigens , or PSAs, " are the true test," 25. The prostate specific antigen test for prostate cancer was a normal 0 . 82. 26. These T cells appear to be driven by specific antigens to invade muscle fibers. 27. Each antibody recognizes a specific antigen unique to its target. 28. Cancer-germline genes are an important source of tumor-specific antigens . 29. Prostate : Annual prostate specific antigen ( PSA ) test should begin at age 50. 30. Prostate-specific antigens are released only by the prostate gland.
