Table II.
Histological categories for grading histology in the simplified system for autoimmune hepatitis (from Hennes et al., 2009, adapt.) 9.
| Histological Categories | Morphological features |
| Typical for AIH | Interface hepatitis, with lymphocytic/lymphoplasmocytic infiltrate in portal tracts extending into the lobule Emperipolesis Hepatic rosette formation (All three features have to be present) |
| Compatible with AIH | Chronic hepatitis pattern of injury with lymphocytic infiltration Lack of all the features considered typical |
| Atypical for AIH | Signs suggestive of other diagnosis |
AIH, Autoimmune hepatitis.