Dear Helen,
It is not possible to give a diagnosis of ovaran cancer. Currently your diagnosis is "pelvic mass'. From the Ct scan, the mass could be an ovary, a fallopian tube, a growth off the uterus, bladder or bowel. It could be a benign tumor, an abscess, or a malignant tumor.
The next step is to have this mass removed. I would reccomend a gyn oncologist - not because I think it is malignant but because gyn oncologists have alot more surgical experience than general gynecologists. If this pelvic mass turns out to be malignant, the gyn oncologist can effectively manage the situation and not have to call anyone else in or send you for a second surgery.
please let us know what happens
best wishes