Table I.

Patient/disease characteristics and stem cell sources.

n	63
Median age, years (range)	9 (1–22)
Gender: female/male	25/38
Diagnoses	Number of recipients
Immunophenotypes
Pre-B cell (1 patient infant MLL)	51
T-cell	12
High risk CR1
Primary induction failure (PIF)	10 [3 also t(9;11)]
t(9;11)	7 (3 also PIF)
Other [secondary ALL 1,	4
patient; t(4;11) plus M2 at day 14,
1 patient, high MRD+ after
consolidation 2 patients]
High risk CR2
BM relapse <18 months (5 T-cell, 1 MLL)	8
BM relapse 18–36 months (3 T-cell)	8
Intermediate risk CR2
BM relapse ≥36 months (all B-cell)	12
Isolated-CNS relapse <18	5
months (2 T-cell, 3 B-cell)
All patients beyond CR2
CR3 (11 patients), CR4 (1 patient)	12
Stem cell source/HLA matching
Related donor-bone marrow
Fully matched sibling	26
5/6 HLA matched sibling	1
6/6 HLA matched parent	1
Unrelated donor-bone marrow/PBSC
10/10 HLA match	3
9/10 HLA match	2
Unrelated donor-cord blood
6/6 HLA match	1
5/6 HLA match	19
4/6 HLA match	9
3/6 HLA match	1