My 28 year old niece had appendix cancer that never had shown a tumor marker in her blood work. She had finished chemo the end of last year and just finished avastin. Her CEA marker showed elevated as it has never done this even when she had the cancer-prior to successful surgery and chemo and avastin. Any suggestion/ info as to why elevated now? (Had googled this and found there could be various reasons.) CT scan shows stable and now they want her to have PET scan. Does anyone have a suggestion? Please help as desperate to find benign reasons.
Thank you ever so much.