Evaluation of Abnormal Liver Biochemical Test Results

Area of Science:

• Hepatology
• Clinical Biochemistry
• Diagnostic Medicine

Background:

• Liver biochemical and function tests are crucial for screening and identifying acute and chronic liver disease.
• Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) elevations indicate hepatocellular injury.
• Alkaline phosphatase elevation suggests cholestasis, while albumin, prothrombin time, and bilirubin reflect hepatic function.

Purpose of the Study:

• To provide a comprehensive overview of the role and interpretation of liver tests in diagnosing and managing liver disease.
• To highlight the diagnostic utility of various liver tests, imaging, and non-invasive markers.
• To discuss the evolving role of liver biopsy in the current diagnostic landscape.

Main Methods:

• Review of liver biochemical tests including ALT, AST, alkaline phosphatase, bilirubin, prothrombin time, and albumin.
• Incorporation of patient history, physical examination, and abdominal imaging in the evaluation process.
• Utilization of elastography and fibrosis indices (e.g., Fibrosis-4, AST-to-platelet ratio) for assessing fibrosis and steatosis.

Main Results:

• Liver tests aid in differentiating hepatocellular versus cholestatic injury and assessing hepatic function.
• Abdominal imaging and elastography provide morphological and structural information about the liver.
• Fibrosis indices and proprietary tests offer non-invasive methods for fibrosis estimation.
• Liver tests are valuable in prognosis assessment, especially in cirrhosis and metabolic dysfunction-associated steatotic liver disease (MASLD).

Conclusions:

• Liver tests are fundamental for diagnosing, staging, and monitoring liver diseases.
• A multi-faceted approach combining biochemical tests, imaging, and non-invasive markers is essential for comprehensive liver disease assessment.
• The role of liver biopsy is diminishing with advancements in non-invasive diagnostic tools.