O-RADS US v2022: An Update from the American College of Radiology's Ovarian-Adnexal Reporting and Data System US Committee.

Radiology

From the Department of Radiology and Biomedical Imaging and Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, 1001 Potrero Ave, 1X57, San Francisco, CA 94110 (L.M.S.); Department of Radiology, Stanford University School of Medicine, Palo Alto, Calif (P.J.); Department of Radiology and Radiologic Sciences, Vanderbilt University Medical Center, Nashville, Tenn (C.H.P.); Department of Obstetrics, Gynecology, and Reproductive Sciences, Larner College of Medicine at the University of Vermont, Burlington, Vt (M.M.B.P.); Department of Obstetrics and Gynecology, University Hospitals and Department of Development and Regeneration, KU Leuven, Leuven, Belgium (W.F., D.T.); Department of Medical Imaging, Sunnybrook Health Science Centre, University of Toronto, Toronto, Canada (P.G.); Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass (Y.G.); Department of Radiology, Mayo Clinic Arizona, Phoenix, Ariz (M.D.P.); Department of Radiology, McGill University Health Centre, Montreal, Canada (C.R.); Department of Gynecologic Oncology, Kaiser Permanente Northern California, Walnut Creek, Calif (E.J.S.B.); and Department of Radiology and Radiological Sciences and Department of Obstetrics and Gynecology, Vanderbilt University College of Medicine, Nashville, Tenn (R.F.A.).

Published: September 2023

First published in 2019, the Ovarian-Adnexal Reporting and Data System (O-RADS) US provides a standardized lexicon for ovarian and adnexal lesions, enables stratification of these lesions with use of a numeric score based on morphologic features to indicate the risk of malignancy, and offers management guidance. This risk stratification system has subsequently been validated in retrospective studies and has yielded good interreader concordance, even with users of different levels of expertise. As use of the system increased, it was recognized that an update was needed to address certain clinical challenges, clarify recommendations, and incorporate emerging data from validation studies. Additional morphologic features that favor benignity, such as the bilocular feature for cysts without solid components and shadowing for solid lesions with smooth contours, were added to O-RADS US for optimal risk-appropriate scoring. As O-RADS US 4 has been shown to be an appropriate cutoff for malignancy, it is now recommended that lower-risk O-RADS US 3 lesions be followed with US if not excised. For solid lesions and cystic lesions with solid components, further characterization with MRI is now emphasized as a supplemental evaluation method, as MRI may provide higher specificity. This statement summarizes the updates to the governing concepts, lexicon terminology and assessment categories, and management recommendations found in the 2022 version of O-RADS US.

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http://dx.doi.org/10.1148/radiol.230685DOI Listing

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