Table 1 Adopted criteria for selected histopathological parameters grading
Parameter | Grade 1 | Grade 2 | Grade 3 |
|---|---|---|---|
Perivascular hemorrhage | One vessel, non-circumferential, 200 × magnification | One vessel, circumferential, 200 × magnification | Multiple vessels, 200 magnification |
Perivascular hemosiderin | One vessel, non-circumferential, 200 × magnification | One vessel, circumferential, 200 × magnification | Multiple vessels, 200 magnification |
Perivascular Inflammatory Infiltrate | One vessel, non-circumferential, 200 × magnification | One vessel, circumferential, 200 × magnification | Multiple vessels, 200 magnification |
Meningeal Hemorrhage | One focus, 200 × magnification | Multiple foci, 200 × magnification | Focal/multifocal, 100 × magnification |
Meningeal Inflammatory Infiltrate | One focus, 200 × magnification | Multiple foci, 200 × magnification | Focal/multifocal, 100 × magnification |