What is LI-RADS ® ?The Liver Imaging Reporting And Data System (LI-RADS) is:• A comprehensive system for standardizing the terminology, technique, interpretation, reporting, and data collection of liver imaging • A dynamic document, to be expanded and refined as knowledge accrues and in response to user feedback • Designed to improve communication, patient care, education, and research • Supported and endorsed by the American College of Radiology (ACR) • Developed by a multidisciplinary, international consortium of diagnostic and interventional radiologists, hepatobiliary surgeons, hepatologists, and hepatopathologists. Contributors include academic and community physicians as well as members in training. Overview Ultrasound LI-RADS ® CEUS LI-RADS ® CT/MRI Diagnostic LI-RADS ® CT/MRI Treatment Response LI-RADS ® LI-RADS ® v2018 CT/MRI Core Diagnostic Algorithm Treatment Response Last Viewed What's New in LI-RADS ® v2018? Revised, simplified definition of threshold growth• Threshold growth definition was simplified to: ≥ 50% size increase of a mass in ≤ 6 months.• Rationale: simplicity; achieve concordance with definitions advocated by AASLD and OPTN.• AASLD, OPTN, and LI-RADS now have the same definition for threshold growth.
⚠️Note: the following no longer meet criteria for TG but are considered subthreshold growth:• New ≥ 10 mm observations in ≤ 24 months • ≥ 100% size increase on imaging exams > 6 months apart Revised, simplified criteria for LR-5:• LR-5 criteria were revised to match those advocated by AASLD.• The -g and -us designations were eliminated for simplicity.• New LR-5 criteria are listed below and summarized in Diagnostic Table (page 8): Size Criteria Comments 10-19 mm Nonrim APHE AND • Nonperipheral "washout" Does not provide exception points for liver transplantation in USA Nonrim APHE AND both of the following: • Nonperipheral "washout" • Enhancing "capsule" Equivalent to OPTN 5A Nonrim APHE AND • Threshold growth* Equivalent to OPTN 5A-g ≥ 20 mm Nonrim APHE AND one or more of following: • Nonperipheral "washout" • Enhancing "capsule" • Threshold growth* Equivalent to OPTN 5B or 5X * Note -apply v2018 definition of threshold growth: ≥ 50% size increase of a mass in ≤ 6 months • Rationale: simplicity; closer concordance with AASLD and OPTN criteria. • LI-RADS and AASLD now have identical criteria for definite HCC. • LI-RADS and OPTN now have almost identical criteria for HCC, with one exception (below). ⚠️ Exception: 10-19 mm + APHE + nonperipheral "washout" = LR-5, but does not meet OPTN Class 5 criteria v2018 also includes clarifications, corrections, new FAQs, and some formatting changes. Most of these are in response to user feedback since v2017 release. What's New 4 LI-RADS ® v2018 CT/MRI Core Diagnostic Algorithm Treatment Response Last ViewedWhy is an update needed in 2018?The LI-RADS mission and long-term vision is to unify HCC diagnostic imaging criteria. Recently, a critical milestone was achieved with integration of LI-RADS into the American Association for the Study of Liver Diseases ...