AI Summary The CLIF-C ACLF score helps doctors judge outlook in acute-on-chronic liver failure (ACLF), a sudden decline in people with chronic liver disease that causes liver failure plus failure of at least one other organ. Infection, bleeding, alcohol-associated hepatitis, or other triggers may set it off. Doctors confirm ACLF first and repeat the score over time, because MELD does not count other organ failures. Care includes organ support, treating the trigger, and early transplant evaluation.
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The CLIF-C ACLF score is a tool doctors use when a person with chronic liver disease suddenly becomes critically ill. ACLF stands for acute-on-chronic liver failure. In this syndrome, liver failure is joined by failure of at least one other organ.
The score comes from the Chronic Liver Failure Consortium (CLIF-C). It is one of the ACLF-specific scores doctors can use to judge outlook. Your care team reads it together with your exam, your labs, and how you respond to treatment.
This page explains what the score is for, how ACLF differs from related conditions, and what to ask your ICU and liver team.
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ACLF PROGNOSIS TOOL
The CLIF-C ACLF score is a prognostic tool from the Chronic Liver Failure Consortium (CLIF-C). Doctors use it in people with acute-on-chronic liver failure (ACLF) to judge how serious the illness is and how it may go in the short term.
ACLF affects people with chronic liver disease, with or without cirrhosis. A sudden event triggers rapid decline. The liver fails, shown by high bilirubin and INR (a clotting test). At least one other organ fails too.
Standard liver scores such as MELD and MELD-Na mainly reflect the liver itself. They do not count organ failures outside the liver, and those failures are common and often decide the outcome in ACLF. For that reason, ACLF-specific scores, including CLIF-C, are recommended instead.
The score does not diagnose ACLF, and it does not replace your doctors' judgment. Your care team can tell you which results they used for your score and what the number means for you.
ACLF CAUSES AND ORGAN FAILURE
The score only makes sense in the context of the condition it measures.
ACLF happens in people who already have chronic liver disease, with or without cirrhosis. An acute insult leads to liver failure and rapid clinical decline. Doctors also see signs of body-wide inflammation.
Four kinds of extra-liver organ failure count in ACLF: brain (such as severe hepatic encephalopathy), circulation (such as shock), lungs (respiratory failure), and kidneys (kidney failure or acute kidney injury). Brain failure means grade 3 or 4 hepatic encephalopathy.
Triggers can start in the liver, such as alcohol-associated hepatitis, acute viral hepatitis, or drug-induced liver injury. They can also start elsewhere, such as a bloodstream infection (sepsis), gastrointestinal bleeding, surgery, or reduced blood flow to an organ. In about 40% of cases, doctors find no clear trigger.
ACLF can worsen quickly and carries high short-term mortality. Early recognition, organ support, and evaluation for liver transplant are important. Many people with ACLF need intensive care.
ACLF PROGNOSIS IN PRACTICE
Doctors first confirm ACLF from the clinical picture: chronic liver disease, sudden decline, liver failure, and at least one organ failure. The CLIF-C ACLF score then helps describe how the illness is likely to go.
Conventional scores such as MELD and MELD-Na mainly reflect liver disease. ACLF-specific scores account for both liver and extra-liver organ failures, which often decide the outcome.
Repeated assessments of prognosis are recommended rather than one score at one moment. A score can change as organs recover or worsen, or as treatment takes effect.
Teams weigh the score with the trend in organ failure, the chance of recovery, and transplant candidacy. These factors guide decisions such as transplant evaluation or, in some cases, a talk about goals of care.
ALF VS. ACLF DEFINITIONS
Three terms sound alike but describe different situations.
| Condition | Who it affects | Organ failure outside the liver? |
|---|---|---|
| Acute liver failure (ALF) | People without preexisting chronic liver disease | Marked by clotting problems and encephalopathy |
| Acute decompensation of cirrhosis | People with cirrhosis who develop worse ascites, variceal bleeding, encephalopathy, or infection | Not necessarily; short-term mortality is not as high |
| Acute-on-chronic liver failure (ACLF) | People with chronic liver disease, with or without cirrhosis | Yes, at least one organ; high short-term mortality |
CLIF-C ACLF is built for the last row. For ALF and other ICU scoring tools, see the ICU / Acute Liver Failure Scores page.
ACLF TREATMENT AND SUPPORT
The score sits inside a larger plan of care.
Many people with ACLF are cared for in intensive care. Support depends on which organs are failing. For severe hepatic encephalopathy, care includes airway protection, ICU admission, treating the trigger, and starting therapy such as lactulose or polyethylene glycol.
Doctors look for and treat the event that set off ACLF, such as an infection. For acute kidney injury, they stop drugs that can harm the kidneys and review diuretics and beta-blockers. Dietitians also provide nutrition support to help meet protein and calorie needs.
Early assessment matters, because delayed transplant often leads to high waitlist mortality. Severe lung or heart failure, uncontrolled sepsis, high vasopressor needs, and severe frailty can make transplant riskier.
No therapy aimed at the inflammation behind ACLF has been proven safe and effective. If ACLF is irreversible and transplant is not an option, a goals-of-care talk that may include palliative care is suggested.
TALKING WITH YOUR ICU TEAM
ACLF moves fast, and families often make decisions under stress. These questions can help you follow the plan.
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Common Questions
CLIF-C ACLF combines the Chronic Liver Failure Consortium (CLIF-C) and acute-on-chronic liver failure (ACLF). The Consortium is the group behind the score. ACLF is a syndrome. A person with chronic liver disease, with or without cirrhosis, declines suddenly. The liver fails, and at least one other organ fails too. The score is made for people who already have ACLF. It helps doctors judge how serious the illness is and how it may go in the short term. It does not diagnose ACLF.
No. MELD and MELD-Na mainly reflect liver disease. They do not count organ failures outside the liver. Those failures involve the brain, circulation, lungs, and kidneys. They are common in ACLF and often decide the outcome. For that reason, ACLF-specific scores that account for both liver and extra-liver organ failure are recommended. CLIF-C is one of them. Your doctors may still look at other scores. Ask which ones they use for you and why.
Your care team is the best source for what your number means. This page does not give cutoffs. In general, the score helps estimate short-term risk. Repeated assessments of outlook are recommended rather than one score at one moment. A score can change as organs recover or worsen, or as treatment takes effect. So one number is a snapshot, not a final answer. You can ask which results went into your score, how it compares with earlier checks, and how it affects decisions such as transplant evaluation.
Yes, it can improve in some people, especially when doctors treat the trigger and support failing organs. Outcomes vary, and the illness can worsen quickly. Reported 28-day mortality is about 30% to 50%, depending on the definition used and the region. This is why early recognition, organ support, and early evaluation for liver transplant matter. Delayed transplant often leads to high waitlist mortality. No therapy aimed at the inflammation behind ACLF has been proven safe and effective yet. If ACLF is irreversible and transplant is not an option, a goals-of-care talk that may include palliative care is suggested.
A sudden event on top of chronic liver disease sets it off. The event is called a trigger. Some triggers start in the liver. Examples are alcohol-associated hepatitis, acute viral hepatitis, and drug-induced liver injury. Others start elsewhere, such as a bloodstream infection (sepsis), gastrointestinal bleeding, surgery, or reduced blood flow to an organ. In about 40% of cases, doctors find no clear trigger. When they do find one, treating it is a key part of care.
Medical disclaimer: LiverDirectory provides educational information and a directory of providers. It does not provide medical advice, diagnosis, or treatment. Always consult a licensed physician regarding any medical condition.
