Table 1.
Clinical characteristics of the B-ALL samples
| Number of patients | 29 |
|---|---|
| Age, years; median (range) | 4·0 (1·2–17) |
| <1 year (%) | 0 (0) |
| 1-10 years (%) | 21 (72) |
| >10 years (%) | 8 (28) |
| Sex | |
| Male (%) | 15 (52) |
| Female (%) | 14 (48) |
| White blood cell count | |
| <50 x 109/l (%) | 23 (79) |
| >50 x 109/l (%) | 4 (14) |
| Unknown (%) | 2 (7) |
| Cytogenetic abnormality | |
| High Hyperdiploidy (51–81 chromosomes) (%) | 8 (28) |
| Pseudodiploidy (%) | 6 (21) |
| Normal (%) | 12 (41) |
| No result (%) | 3 (10) |
| Treatment protocol | |
| SHOP/LAL 99 (%) | 14 (48) |
| SHOP/LAL 2005 (%) | 11 (38) |
| Not specified (%) | 4 (14) |
| Median follow-up (years) | 6·5 |
| Relapse | |
| Yes (%) | 5 (17)* |
| No (%) | 24 (83) |
*
Four out of five samples taken at relapse.
SHOP/LAL, Sociedad Española de Hematología Pediátrica /Leucemia Aguda Linfoblástica.