Within 3 years, only a single case of ovarian cancer was diagnosed in over 15,000 women with simple ovarian cysts, for likelihood ratios of 0.00 for those under age 50 (95% CI 0.00-1.03) and 0.06 ...

Simple ovarian cysts discovered on ultrasound are not associated with an increased risk for ovarian cancer and do not need further follow-up imaging, say researchers.