science Lab Test

Extended Liver Panel: What Your Results Mean

An extended liver panel goes beyond a standard liver function test to provide a more detailed picture of liver synthetic function, protein metabolism, bilirubin processing, and bile duct health. It includes albumin and total protein (markers of the liver's ability to produce proteins), total and direct bilirubin (markers of bilirubin processing and bile flow), and GGT (gamma-glutamyl transferase, a sensitive enzyme for liver and bile duct stress). Together, these markers help distinguish between different types of liver disease and assess the severity of liver dysfunction.

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What It Tests

This panel measures albumin (the liver's main protein product, reflecting synthetic function), total protein (combined albumin and globulins), total bilirubin (overall bilirubin load from red blood cell breakdown), direct bilirubin (the conjugated fraction processed by liver cells, reflecting bile excretion efficiency), and GGT (a highly sensitive enzyme marker of hepatocellular and bile duct stress, particularly from alcohol or obstruction).

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Why It's Ordered

An extended liver panel is ordered when standard liver tests show abnormalities that require further characterisation, when jaundice needs investigation, when alcohol-related liver disease is suspected, when chronic liver conditions such as cirrhosis or hepatitis are being monitored, or when assessing nutritional status in patients with liver disease. It helps distinguish hepatocellular damage (affecting protein synthesis and bilirubin conjugation) from cholestatic disease (affecting bile flow and GGT).

Markers in This Test

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Albumin
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Direct Bilirubin
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Total Bilirubin
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GGT (Gamma-Glutamyl Transferase)
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Total Protein
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Frequently Asked Questions

What is the difference between this and a standard liver function test? expand_more
A standard liver function test (LFT) typically includes ALT, AST, ALP, GGT, total bilirubin, and albumin. An extended liver panel adds direct bilirubin and total protein, and may include additional markers. The extended panel is particularly useful for assessing the liver's synthetic capacity and for distinguishing intrahepatic from extrahepatic cholestasis using the direct-to-total bilirubin ratio.
What does the ratio of direct to total bilirubin tell us? expand_more
When direct bilirubin is more than 50% of total bilirubin, the pattern is called direct hyperbilirubinaemia — suggesting a problem with bile excretion (liver disease, bile duct obstruction). When most of the bilirubin is indirect (unconjugated), the problem is usually excessive red blood cell breakdown (haemolysis) or impaired conjugation (Gilbert's syndrome). This ratio helps direct further investigation.
Can GGT alone diagnose alcohol-related liver disease? expand_more
GGT is highly sensitive to alcohol but not specific — it is also raised by fatty liver disease, bile duct problems, and many medications. A very elevated GGT alongside elevated AST and ALT in a ratio of 2:1 (AST:ALT) strongly suggests alcoholic hepatitis, but diagnosis requires clinical context, imaging, and sometimes liver biopsy. GGT normalises within weeks of alcohol abstinence.
What does low albumin mean in liver disease? expand_more
Albumin is produced exclusively by the liver, so low albumin in the context of liver disease reflects impaired synthetic function — a sign of significant hepatocellular damage. In cirrhosis, low albumin is a component of the Child-Pugh score used to assess disease severity and prognosis. It also leads to fluid accumulation (ascites, oedema) because the oncotic pressure maintaining fluid in blood vessels is reduced.
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