| Score |
Findings |
| 0 |
Absent or rare single CK7+ cholangiocytes or ductular reaction |
| 1 |
Rare single or focal ductular reaction or focal clustering of CK7+ cholangiocytes* in periportal areas |
| 2 |
Continuous ductular reaction or clusters of CK7+ cholangiocytes* occupying <50% of portal areas |
| 3 |
Continuous ductular reaction or clusters of CK7+ cholangiocytes* occupying >50% of portal areas |
CK7: cytokeratin 7
*CK7+ cholangiocytes with and without ductular structures |
