Why get tested? To monitor the response to treatment of invasive breast cancer and to watch for recurrence of the disease.
Monitor Treatment. Tumor markers can be used to monitor the effectiveness of treatment, especially in advanced cancers. If the marker level drops, the treatment is working; if it stays elevated, adjustments are needed.
What is being tested? Cancer antigen 15-3 (CA 15-3) is a normal product of breast cells; it is produced by a gene that is often over expressed (i.e., the body makes too many copies) in cancerous breast tumors, leading to an increased production of CA 15-3 and the related Cancer antigen 27.29. CA 15-3 does not cause cancer; rather, it is a protein that is shed by the tumor cells, making it useful as a tumor marker to follow the course of the cancer. CA 15-3 is elevated in about 30% of women with localized breast cancer and in about 75% of those with metastatic breast cancer (cancer that has spread to other organs).
I was at 244 and am now down to 136. Which for me is definitely reason to celebrate. I have been warned, these can fluctuate and we need to see not just these drop but a negative PET Scan which I understand but this still gave me what I needed for now. My last treatment was a marathon I was plugged in for 6 hours. I handled it better than my first which they did say would happen so honestly I never know what to expect or how I will feel but so far I am doing very well. My schedule has changed so I will be going on Mondays from now on.
I know as soon as I post this each of you will be celebrating my good news with me. Thank you! I will keep the good news coming.
