What's the probability of a trans vaginal ultrasound missing a tumor on your ovary?

Not common: Patients that are overweight may limit the visibility of the ovaries, but in the majority of patients, the ovaries can be identified with transvaginal ultrasound. The ovaries, after menopause, may become too small to identify with certainty. Unfortunately, there is still no satisfactory method for screening for ovarian cancer prior to a patient becoming symptomatic.