A 52-year-old man with a 20-year history of heavy alcohol consumption presents with hepatomegaly, jaundice, and ascites. Liver biopsy shows hepatocyte ballooning, neutrophilic infiltration, and Mallory-Denk bodies. Regarding the pathological features of alcoholic liver disease, all of the following are characteristic findings EXCEPT:
A. Fibrosis predominantly in the periportal zone (Zone 1) with relative sparing of the pericentral zone
B. Alcoholic hyaline (Mallory-Denk bodies) composed of ubiquitinated protein aggregates
C. Neutrophilic infiltration with microabscess formation around degenerating hepatocytes
D. Hepatocyte steatosis due to impaired fatty acid oxidation and increased lipogenesis
Explanation
Pathological Features of Alcoholic Liver Disease
Characteristic Findings in Alcoholic Liver Disease
Key Point
The classic triad of alcoholic liver disease comprises steatosis, inflammation, and fibrosis. Understanding the zonal distribution of injury is critical for exam success.
Zonal Pattern of Injury — The Trap
In alcoholic liver disease, fibrosis and cirrhosis develop with a characteristic pericentral (Zone 3) predominance, NOT periportal (Zone 1) predominance. This is a high-yield distinguishing feature:
Table
Feature
Alcoholic Liver Disease
Primary Biliary Cholangitis (PBC)
Primary Sclerosing Cholangitis (PSC)
Fibrosis pattern
Pericentral (Zone 3) → bridging
Periportal inflammation
Portal/periportal
Cholestasis
Minimal
Marked
Marked
Bile duct injury
Absent
Granulomatous
Fibro-obliterative
High-YieldNEET PG
Zone 3 (pericentral) fibrosis in alcoholic cirrhosis is a board-level fact. Zone 1 (periportal) fibrosis is seen in viral hepatitis and autoimmune conditions.
Correct Pathological Features
1.
Hepatocyte Steatosis ✓
Alcohol impairs mitochondrial β-oxidation of fatty acids
Increases acetyl-CoA → enhanced lipogenesis
Appears as lipid droplets in hepatocytes
2.
Alcoholic Hyaline (Mallory-Denk Bodies) ✓
Aggregates of ubiquitinated proteins (primarily α1-antitrypsin, keratin-8)
Stains with orcein, PAS, and immunohistochemistry for ubiquitin
Progressive fibrosis bridges Zone 3 to Zone 3 (central-to-central bridging)
Eventually leads to cirrhosis with a characteristic "chicken-wire" pattern
Clinical Pearl
The pericentral pattern explains why alcoholic cirrhosis often spares the periportal zone initially — a useful clue when reviewing biopsy images.
Why Option 1 (Periportal Fibrosis) Is Wrong
Option 1 states fibrosis is "predominantly in the periportal zone (Zone 1) with relative sparing of the pericentral zone." This is the opposite of what occurs in alcoholic liver disease. Periportal fibrosis is characteristic of:
Viral hepatitis (HBV, HCV)
Autoimmune hepatitis
Primary biliary cholangitis (PBC)
In alcoholic disease, the fibrosis pattern is pericentral → central bridging → cirrhosis.
Warning
This is a classic exam trap. Students often confuse the zonal patterns across different liver diseases. Memorize: Alcohol = Zone 3 (pericentral); Viral = Zone 1 (periportal).
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