Periportal or periseptal interface hepatitis |
Severe (continuous around > 50% of portal areas). Moderate plasma cells infiltrate |
4 |
Mild/moderate (focal, most portal areas). Scattered plasma cells and eosinophils |
2 |
Moderate (continuous around <50% of tracts). Moderate plasma cells infiltrate |
3 |
Confluent necrosis |
Zone 3 necrosis in some areas |
2 |
Absent |
0 |
Absent |
0 |
Focal (spotty) lytic necrosis, apoptosis and focal inflammation |
Five to ten foci per 10X objective, perivenular necroinflammatory infiltrate |
3 |
Two to four foci per 10X objective, perivenular necroinflammatory infiltrate |
2 |
One focus per 10X objective |
1 |
Portal inflammation |
Marked, all portal areas |
4 |
Mild, focal inflammation |
1 |
Moderate, all portal areas |
3 |
Fibrosis |
No fibrosis |
0 |
Fibrous expansion of some portal areas, without septa |
1 |
Fibrous expansion of most portal areas, with short fibrous septa |
2 |
Other features |
Mild bile duct injury |
|
Focal ductular hyperplasia, no rosettes |
Mild biliary regression, focal rosettes |