| Cytogenetic Markers | Pediatric T-ALL |
| Adult T-ALL |
| ||||||||||
| Ploidy | Ploidy | |||||||||||||
| Hypodiploidy | Diploidy | Hyperdiploidy | Hypodiploidy | Diploidy | Hyperdiploidy | |||||||||
| Pos | Neg | Pos | Neg | Pos | Neg | p-value | Pos | Neg | Pos | Neg | Pos | Neg | p-value | |
| del(9p) | 20 20% | 24 20% | 72 67% | 86 70% | 14 13% | 13 10% | 0.826 | 32 27% | 26 16% | 73 63% | 107 66% | 12 10% | 29 18% | 0.03 |
| MLL translocations | 2 18% | 43 20% | 9 82% | 142 67% | 0 0% | 27 13% | 0.414 | 2 33% | 51 22% | 4 67% | 141 62% | 0 0% | 37 16% | 0.519 |
| TCRα, TCRβ, TLX1, TLX3 | 18 22% | 25 19% | 54 67% | 88 69% | 9 11% | 15 12% | 0.895 | 21 25% | 35 19% | 57 67% | 116 63% | 7 8% | 32 18% | 0.111 |
| Age 1 - 10 years
11 - 15 years
| - 21 47% - 24 53% | - - | - 91 56% - 70 44% | - | - 16 59% - 11 41% | - | 0.447 - - - - - | <40 years 50 86% >40 years 8 14% | - |
161 88%
21 12% | - |
32 78%
9 22% | - | 0.212 - - - - - |