Diagnostic performance comparison of two ultrasound classification systems for hepatic alveolar echinococcosis: a single-center retrospective study

The EMUC-US and EMNHCC-US systems share core features, but EMUC-US includes smaller, atypical lesions (e.g., ossification, metastasis-like), enhancing early HAE detection with higher sensitivity and NPV, ideal for screening. EMNHCC-US focuses on advanced lesions, offering high specificity for confirmation. They are complementary: EMUC-US for sensitive screening, EMNHCC-US for specific diagnosis. Together, they enable a stratified strategy, optimizing case identification and clinical decisions despite lesion heterogeneity.