I had stage 2 breast cancer one lymph node positive ,lumpectomy, chemo with ariamician, cytoxin, taxol, then radiation, 7 years cancer free, 6 years on tamoxifen, my cancer was er and pr positive. ca 27 level was 16 at the end of radiation now its up to 33. im 54 postmenopausal. my chest exrays are clear, negative mamagram two weeks ago, concerned about the rise in ca 27