Immunoreactivity score (IRS) of leukemic blasts
Scoring points . | Receptor-positive (RP) blasts, % . | Staining intensity (SI) . |
|---|---|---|
| 0 | Negative | Negative |
| 1 | < 10 | Weakly positive |
| 2 | 10-50 | Moderately positive |
| 3 | 51-80 | Strongly positive |
| 4 | > 80 | — |
Scoring points . | Receptor-positive (RP) blasts, % . | Staining intensity (SI) . |
|---|---|---|
| 0 | Negative | Negative |
| 1 | < 10 | Weakly positive |
| 2 | 10-50 | Moderately positive |
| 3 | 51-80 | Strongly positive |
| 4 | > 80 | — |
Immunoreactivity score (IRS, 0-2) = RP (0-4) × SI (0-3).
— indicates none defined.