Histopathologic findings in RPF biopsies (N=43) according to IgG4: total IgG ratio
| IgG4/IgG ratio ≥40% | IgG4/IgG ratio <40% | p-value | |
|---|---|---|---|
| N=21 | N=22 | ||
| Lymphoplasmacytic infiltrate | 21 | 13 | 0,002 |
| Storiform fibrosis | 12 | 3 | 0,004 |
| Obliterative phlebitis | 5 | 1 | 0,078 |
| Phlebitis without obliteration | 4 | 2 | 0,378 |
| Increased numbers of eosinophils | 13 | 6 | 0,030 |