Table I.
| No | Yes | Unknown | |
|---|---|---|---|
| Fever ≥ 38.5°C | −1 | 0 | −1 |
| Enlarged lymph nodes (≥2 sites, >1 cm) | 0 | 1 | 0 |
| Atypical lymphocytes | 0 | 1 | 0 |
| Eosinophilia | 0 | — | 0 |
| 0.7-1.499 × 109/L or 10%-19.9% | — | 1 | — |
| ≥1.5 × 109/L or ≥20% | — | 2 | — |
| Skin rash | 0 | — | 0 |
| Extent >50% | 0 | 1 | 0 |
| At least 2 of edema, infiltration, purpura, scaling | −1 | 1 | 0 |
| Biopsy suggesting DRESS | −1 | 0 | 0 |
| Internal organ involved | 0 | — | 0 |
| 1 | — | 1 | — |
| 2 or more | — | 2 | — |
| Resolution in >15 d | −1 | 0 | −1 |
| At least 3 biological investigations done and negative to exclude alternative diagnosis | 0 | 1 | 0 |
Final score: <2, no cases; 2-3, possible case; 4-5, probable case; >5, definite case.