I've had a pet scan and pelvic MRI which shows fibroid of 15 cm at largest part and no indications of cancer. Also had blood test which came back negative. With a history of breast cancer (ER-pos,PR-pos,HR2-neg) - recent mastectomy, in chemo - is there a better than normal chance that I may have uterine cancer? Hysterectomy has been delayed due to breast cancer.