Table 2 Based on the histopathological evaluation, all patients (n = 51) were divided into two groups: chronic sclerosing sialadenitis or non-sclerosing chronic sialadenitis. This table summarizes the histopathological and immunohistological findings in chronic sclerosing sialadenitis and non-sclerosing chronic sialadenitis

 Associated sialolithiasis

11

32

8

47

 Dense lymphoplasmacytic infiltrate

29

85

11

65

 Germinal centers with lymphoid follicles

29

85

9

53

 Fibrosis: storiform

20

58

6

35

 Fibrosis: dense

28

82

15

88

 Eosinophilic infiltrate

1

3

1

6

 ≥70 IgG4 + plasma cells/HPF

8

24

4

24

 Additional IgG^a and CD31^b staining

n = 8

%

n = 4

%

 IgG4/IgG-plasma cell ratio ≥40%

3

38

3

75

 Obliterative phlebitis

1

13

2

50