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The main added value of O\u2010RADS MRI over O\u2010RADS US is to correctly reclassify lesions that were considered suspicious on US as benign on MRI. The crucial issue when characterizing an adnexal mass is to determine the presence\/absence of solid tissue and thus need to perform gadolinium injection. O\u2010RADS MR score was built on a multivariate analysis and must be applied as a step\u2010by\u2010step analysis: 1) Is the mass an adnexal mass? 2) Is there an associated peritoneal carcinomatosis? 3) Is there any significant amount of fatty content? 4) Is there any wall enhancement? 5) Is there any internal enhancement? 6) When an internal enhancement is detected, does the internal enhancement correspond to solid tissue or not? 7) Is the solid tissue malignant? With its high value to distinguish benign from malignant adnexal masses and its high reproducibility, the O\u2010RADS MRI score could be a valuable tool for timely referral of a patient to an expert center for the treatment of ovarian cancers. 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