Hi, everybody! I was diagnosed with breast cancer at stage III in Feb. 2000. After having surgery, chemo & radiation therapy, I have been doing fine except that my CA15-3 (a tumor marker for breast cancer) is not stable. The normal range for CA15-3 is 30. My CA15-3 had increased from 36 to 68, between May and Oct. 2001, and then the number dropped down gradually to 36 in May 2002. However, from July 2002 to July 2003, my CA15-3 increased from 44 to 605. In the last 2 years, I have taken all necessary examinations every few months, including very expensive PET scans four times. Although I took so many exams, doctors still can