N MFs in
the central part		 MFs in areas
without inflammatory infiltration
around the central part		 MFs in areas
with inflammatory infiltration
around the central part		 Degree of inflammatory
infiltration		 MFs
(%)
3 - - - mild 0
4 - - - severe 0
1 - + + mild 1 - 20
2 + - + mild 1 - 20
2 + - + moderate 1 - 20
3 + + + severe 21 - 60
2 + + - moderate 21 - 60

N = number of cases.