Diagnostic Criteria for Alcoholic Hepatitis

Laboratory Findings

• The National Institute on Alcohol Abuse and Alcoholism (NIAAA) diagnostic criteria classify cases with AST < 50 IU/mL as "possible AH" with atypical laboratory tests, requiring liver biopsy for confirmation 1, 2
• The American Association for the Study of Liver Diseases states that an AST/ALT ratio >2 is highly suggestive of alcoholic liver disease, but a ratio < 1.5 represents atypical laboratory findings 1, 2, 3

Diagnostic Classification

• The NIAAA classification requires three elements for "probable AH": heavy alcohol use, typical liver tests without confounding factors, and in such cases <10% will have an alternative diagnosis on biopsy 1, 4
• The NIAAA recommends liver biopsy for histological confirmation in cases of "possible AH" because the risk of misdiagnosis is high 4, 5

Clinical Presentation

• Alcoholic fatty liver typically presents with normal or mildly elevated AST, ALT, or bilirubin levels, which matches the patient's presentation 6
• The absence of jaundice, normal bilirubin, and normal alkaline phosphatase suggest less severe alcohol-related liver injury rather than the acute inflammatory syndrome of alcoholic hepatitis 1, 6

Diagnostic Approach

• The American Association for the Study of Liver Diseases recommends obtaining detailed alcohol consumption history, performing non-invasive fibrosis assessment, and screening for alternative or coexisting liver diseases 1, 3, 6
• Consider liver biopsy via transjugular route if the diagnosis remains uncertain or if specific treatment decisions depend on histological confirmation 4, 5, 6

Treatment

• Alcohol abstinence is the single most effective intervention for long-term survival and can result in normalization of liver enzymes and improved clinical features even in cirrhosis 3, 6, 7
• Initiate abstinence counseling immediately and consider thiamine supplementation to prevent Wernicke's encephalopathy 3, 7
• Aggressive nutritional support with 1.0-1.5 g protein/kg/day and 30-40 kcal/kg/day should be implemented 7