The following is the O-RADS Ultrasound (US) Lexicon, modified in table form, representing a practical vocabulary that permits a standardized description of the imaging characteristics of ovarian masses. This lexicon is based upon evidence and common usage of terms with the ultimate goal of applying it to a risk stratification classification for consistent follow up and management in clinical practice.
The lexicon is based upon consensus of the committee taking into consideration supporting evidence for performance of terms with regards to classification of the mass as benign or malignant and common usage of terms. A large part of the lexicon, including the major classes of lesions, is based upon terms/descriptors in use by the International Ovarian Tumor Analysis Group (IOTA) whose members have compiled decades of outcomes data based upon ovarian lesion characterization.
These terms demonstrate consistency regarding performance in evaluation of malignancy risk and have been supplemented with other modifying, non-IOTA descriptors. Some are synonyms to IOTA descriptors that have been added for user familiarity. Further information regarding the O-RADS-US Lexicon can be found in the published article and the educational training module.