- Acute-on-chronic liver failure (ACLF) is a severe syndrome characterized by acute decompensation, organ failure, and high short-term mortality in patients with cirrhosis. However, ACLF lacks a universally accepted definition.
The critical question addressed in this study was:
Does the newer consensus framework accurately identify high-risk ACLF patients, or does it underdiagnose clinically meaningful disease compared with outcome-based models?
The A-TANGO model identified substantially more patients as ACLF compared with the consensus definition. Importantly, many patients labeled “non-ACLF” by the consensus criteria but classified as ACLF by A-TANGO had significant short-term mortality, with 28-day mortality ranging from 18%–27%.
A-TANGO consistently showed higher sensitivity for predicting mortality, whereas the consensus definition was more specific but captured a smaller and more advanced liver-centered phenotype.
The study also demonstrated that the consensus “non-ACLF” group was not truly low risk. A-TANGO further stratified these patients into progressively higher mortality groups, revealing hidden clinical heterogeneity.
Overall, the findings suggest that A-TANGO may identify patients earlier in the disease trajectory, potentially at a stage where intervention remains possible. In contrast, the consensus framework appears to diagnose ACLF later, potentially missing high-risk patients with evolving multi-organ dysfunction.
This work has major implications for clinical care, ICU triage, transplant decisions, and future ACLF trial design.
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