A 45-year-old woman presents with a 1-week history of jaundice, anorexia, and right upper quadrant discomfort. On examination she is icteric, with a tender right upper quadrant and liver span of 14 cm. There is no shifting dullness or pedal edema and the heart and lungs are normal. On further inquiry, she reports consuming one bottle of wine a day for the past 6 months. Which of the following laboratory tests is most likely to be characteristic of a patient with jaundice secondary to alcoholic hepatitis?

**Core Concept**
Alcoholic hepatitis is a clinical syndrome characterized by liver inflammation and damage due to chronic alcohol consumption. The condition is associated with an imbalance between the production and clearance of reactive oxygen species (ROS) in the liver, leading to oxidative stress and hepatocyte injury.

**Why the Correct Answer is Right**
The laboratory test that is most likely to be characteristic of a patient with jaundice secondary to alcoholic hepatitis is the gamma-glutamyl transferase (GGT) level. Elevated GGT levels are seen in patients with alcoholic liver disease due to the induction of CYP2E1, an enzyme that metabolizes ethanol and generates ROS. This oxidative stress causes an increase in GGT activity, making it a sensitive marker for alcoholic liver disease. Additionally, GGT is also elevated in patients with other forms of liver injury, including viral hepatitis and cirrhosis.

**Why Each Wrong Option is Incorrect**
**Option A:** Aspartate aminotransferase (AST) is also elevated in patients with liver injury, but it is not as specific for alcoholic liver disease as GGT. AST levels can be elevated in a variety of conditions, including myocardial infarction and muscle damage.
**Option B:** Alkaline phosphatase (ALP) is elevated in patients with cholestasis and bone disorders, but it is not as sensitive for alcoholic liver disease as GGT. ALP levels can also be elevated in patients with viral hepatitis and cirrhosis.
**Option D:** Total bilirubin is elevated in patients with jaundice, but it is not specific for alcoholic liver disease. Bilirubin levels can be elevated in a variety of conditions, including hemolysis, biliary obstruction, and liver dysfunction.

**Clinical Pearl / High-Yield Fact**
In patients with suspected alcoholic liver disease, it is essential to obtain a detailed history of alcohol consumption and to perform a thorough physical examination. The presence of a tender liver, jaundice, and an elevated GGT level can be indicative of alcoholic liver disease. However, a definitive diagnosis requires a liver biopsy.

**Correct Answer:** C. Gamma-glutamyl transferase (GGT) level.

✓ Correct Answer: B. ratio of AST :ALT is 2 :1 and the AST is 250 U/L