Research Article
Histopathologic Overlap between Fibrosing Mediastinitis and IgG4-Related Disease
Table 2
Distribution of the diagnostic criteria of IgG4-RD.
| | FM IgG4-RD () | FM-non-IgG4-RD () |
| | ≥50 IgG4-positive plasma cells/HPF and ≥40% IgG4/IgG ratio, case (%) | 3 (100) | 0 (0) | | Lymphoplasmacytic infiltrate, cases (%) | 3 (100) | 7 (58) | | Storiform, cell-rich fibrosis, cases (%) | 3 (100) | 11 (91) | | Obliterative phlebitis/arteritis, cases (%) | 2 (66) | 2 (16) |
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