{"entity":{"id":"o-rads","kind":"term","name":"O-RADS (Ovarian-Adnexal Reporting and Data System)","aka":["O-RADS","O-RADS US","O-RADS MRI","Ovarian-Adnexal Reporting and Data System"],"tldr":"O-RADS sorts a lump on or near an ovary seen on ultrasound or MRI into a numbered risk category, so the report says how likely it is to be cancer and what should happen next.","summary":"O-RADS is the American College of Radiology's system for describing and classifying ovarian and adnexal lesions. It has two arms: ultrasound, the first test and tuned for sensitivity, and MRI, a second test that adds specificity. Both use a shared lexicon and assign a risk-of-malignancy category.\n\nThe ultrasound consensus guideline (Andreotti and colleagues, Radiology 2020) has six categories, O-RADS 0 to 5, covering the range from normal to high risk of malignancy, each with a management recommendation. It joins the North American pattern-based approach to the International Ovarian Tumor Analysis (IOTA) ADNEX risk model so that either route reaches the same category and the same advice.","asOf":"2026-11-04","links":[{"label":"Andreotti et al., O-RADS US Risk Stratification and Management System: a consensus guideline from the ACR O-RADS Committee (Radiology 2020)","url":"https://doi.org/10.1148/radiol.2019191150"},{"label":"American College of Radiology, O-RADS","url":"https://www.acr.org/clinical-resources/clinical-tools-and-reference/reporting-and-data-systems/o-rads"}],"tags":[],"related":["ca-125","bi-rads"],"cancers":["ovarian"],"sections":[],"technologies":["ultrasound","mri"],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"category":"Diagnostics & imaging"},"route":"/terms/o-rads/","neighbours":{"term":[{"id":"bi-rads","kind":"term","name":"BI-RADS (Breast Imaging Reporting and Data System)","route":"/terms/bi-rads/"},{"id":"ca-125","kind":"term","name":"CA-125","route":"/terms/ca-125/"},{"id":"gcig-ca125","kind":"term","name":"GCIG CA-125 response and progression criteria (ovarian cancer)","route":"/terms/gcig-ca125/"},{"id":"pi-rads","kind":"term","name":"PI-RADS (Prostate Imaging Reporting and Data System)","route":"/terms/pi-rads/"}],"cancer":[{"id":"ovarian","kind":"cancer","name":"Ovarian cancer","route":"/cancers/ovarian/"}],"technology":[{"id":"mri","kind":"technology","name":"MRI","route":"/technologies/mri/"},{"id":"ultrasound","kind":"technology","name":"Ultrasound","route":"/technologies/ultrasound/"}]}}