My doctor found a nodular mass in my annual exam yesterday. it is in the cul de sac between the uterus and colon. Although I have not had pain, when she preseed on it, it was very tender and uncomfortable. She indicated that I should have an ultrasound and blood work. I am 49 and have had mini-cycles twice this year (14 days and 15 days after a regular cycle). However, she did not schedule the blood work or untrasound yesterday and her assistant did not call today, so I don t think this is urgent. My question is: what percent of masses in this area are cancer?