Table I.

Histological scoring for acute pancreatitis, as described by Rongione et al (25).

Edema	Necrosis	Inflammatory cell infiltration	Bleeding
1 = Focally increased between lobules	1 = Periductal necrosis (<5%)	1 = In ducts (around ductal margins)	1 = In the parenchyma bleeding (0–25%)
2 = Diffusely increased between lobules	2 = Focal necrosis (5–20%)	2 = In the parenchyma (in <50% of the lobules)	2 = In the parenchyma bleeding (25–50%)
3 = Acini disrupted and separated	3 = Diffuse parenchymal necrosis (20–50%)	3 = In the parenchyma (in 50–75% of the lobules)	3 = In the parenchyma bleeding (50–75%)
4 = Obvious lobules separated	4 = Diffuse parenchymal necrosis >50%	4 = In the parenchyma (>75% of the lobules)	4 = In the parenchyma bleeding >75