No. A lot of people think this, but this is not correct. Prostate cancer can spread to other parts of the body; thus, prostate cancer cells any place in a man’s body produce PSA whether they are located in bone, lung, prostate, lymph nodes or any other area. A prostate cancer cell in a man’s left shoulder makes the same amount of PSA as one in his prostate. Thus, a PSA test checks for prostate cancer throughout a man’s body, but PSA gives no information about where the cancer cells are located.