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Table 1 Main features of alcoholic and nonalcoholic fatty liver disease at histology

From: What are the common downstream molecular events between alcoholic and nonalcoholic fatty liver?

Alcoholic Liver Disease

Non Alcoholic Fatty Liver Disease

Macrovescicular steatosis is largely represented

Macrovescicular steatosis is less represented

Mallory hyaline is recurrent

Mallory hyaline is not occurring often

Swollen hepatocytes/Ballooned cells are more frequent

Swollen hepatocytes/Ballooned cells are less present

Lobular infiltration of polymorphonuclear leukocytes (neutrophils) is severe

Usually, there is mild lobular infiltration with foci of mononuclear cell clusters, and occasional eosinophils or neutrophils.

Inflammatory cell infiltration is more pronounced

Inflammatory cell infiltration is less marked

Perivenular fibrosis with the chicken wire” pattern of fibrosis is common

Fibrosis typically begins in zone 3 with the characteristic pericellular “chicken wire” pattern

Fibro-obliterative/inflammatory lesions of the outflow veins, alcoholic foamy degeneration are present

Fibro-obliterative lesions are not constant and foamy degeneration is rare

Acute cholestasis is often present

Intrahepatic cholestasis is associated with more advanced histological impairment

Phlebosclerosis, and (less commonly) lymphocytic phlebitis are present

Phlebosclerosis is rare

There is solid fibrosis

There is lattice fibrosis

Megamitochondria, bile stasis, hemosiderin deposition, vacuolic nuclei, and lipogranuroma are scarcely represented

Megamitochondria, bile stasis, hemosiderin deposition, vacuolic nuclei, and lipogranuroma are more often represented

Bridging necrosis is frequent

Bridging necrosis is rare

Fibrosis/cirrhosis is more frequent

Fibrosis/cirrhosis is less frequent

  1. The features at histology overlap, and it is not easy to clearly separate the two entities