Provisional classification of patients in the low-risk group (at diagnosis)
| Feature . | Type/value/definition . |
|---|---|
| Lineage | B-precursor ALL |
| Age, y | 1.0 to 9.9 |
| Leukocyte count, ×109/L | <50 |
| CNS involvement | CNS 1 or 2 |
| Testicular involvement | No |
| DNA index | >0.95 |
| Genotype | Excluded: t(9;22)/BCR-ABL, t(1;19)/TCF3-PBX1, t(17;19)/TCF3/HLF, KMT2A rearrangement, and iAMP21 |
| Feature . | Type/value/definition . |
|---|---|
| Lineage | B-precursor ALL |
| Age, y | 1.0 to 9.9 |
| Leukocyte count, ×109/L | <50 |
| CNS involvement | CNS 1 or 2 |
| Testicular involvement | No |
| DNA index | >0.95 |
| Genotype | Excluded: t(9;22)/BCR-ABL, t(1;19)/TCF3-PBX1, t(17;19)/TCF3/HLF, KMT2A rearrangement, and iAMP21 |