Table I.

Histological grading scores.

Grading	Fibrosis	Lipomatous atrophy	Inflammatory infiltration	Inflammatory activity	Microscopic necrosis
0	No	No	No	No	No
1	Periductal	Little	Little	little	Single cells
2	Periductal, intra- and interlobular	Moderate	Moderate	Moderate	Grouped necrosis
3	Extensive	Severe	Severe	Severe	Broad