I am 44years old, and I'm 8weeks late with my menstral cycle. I had a cyst back in May that was filled with blood. Since then I have been irregular. I went for a vaginal ultrasound and it says impression: uniform endometrium measuring 13 mm in thickness and non visualized left overy. My Doctor called and will be performing a procedure for a biopsy. What are the chances that it will come back with cancer cells?