This is a clinical practice guideline for asymptomatic women with suspected or confirmed adnexal masses. The guideline provides recommendations on various imaging procedures used to confirm the presence of adnexal masses, and to determine whether they are benign or malignant. The appropriateness of procedures indicated in specific clinical scenarios (measured by validity, reliability/reproducibility, clinical applicability, relative radiation levels, etc.) is examined. Recommendations are separated based on menopausal status.