If a patient has bilirubin 20 mg/dl, AST=313,, ALT=103 & GGT=44 IU/L. Most probable diagnosis is:
**Core Concept**
The patient's liver function test (LFT) results indicate a mixed pattern of enzyme elevation, which is suggestive of a specific underlying liver pathology. The combination of significantly elevated AST, relatively lower ALT, and a mild elevation in GGT points towards a particular type of liver injury.
**Why the Correct Answer is Right**
The patient's AST:ALT ratio is significantly elevated (>3), which is a hallmark of alcoholic liver disease. In alcoholic liver disease, the AST level is often higher than ALT due to the direct toxic effect of alcohol on the hepatocytes, leading to mitochondrial damage and subsequent release of AST into the bloodstream. GGT is also elevated, which is a sensitive marker of alcohol abuse. The mildly elevated bilirubin level may indicate some degree of cholestasis or liver dysfunction.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not explain the significant elevation in AST and the relative sparing of ALT. While viral hepatitis can cause mixed LFT patterns, the AST:ALT ratio is typically not as high as in this case.
**Option B:** This option is incorrect because it does not account for the significant elevation in AST and the mild elevation in GGT. While autoimmune hepatitis can cause mixed LFT patterns, the AST:ALT ratio is typically not as high as in this case.
**Option C:** This option is incorrect because it does not explain the significant elevation in AST and the relatively lower ALT. While drug-induced liver injury can cause mixed LFT patterns, the AST:ALT ratio is typically not as high as in this case.
**Clinical Pearl / High-Yield Fact**
In a patient with a high AST:ALT ratio (>2), the possibility of alcoholic liver disease should be strongly considered, especially if there is a history of excessive alcohol consumption.
**Correct Answer: C. Alcoholic liver disease.**