Table 2.

Patient Characteristics

Characteristics	Number of Patients (n = 15)
Sex
Male	8
Female	7
Age, years
Median	10
Range	3-18
Presenting WBC, per μL
Median	3,950
Range	100-10,300
Presenting absolute blast count, per μL
Median	384
Range	0-9,400
Site/Timing of relapse
First relapse	11
Early isolated marrow	7
Late isolated marrow	1
Late marrow + CNS	2
Late marrow + testicular	1
Second or greater relapse	4
Isolated marrow	2
Marrow + CNS	2

NOTE. Early relapse, relapse occurring < 36 months from initial diagnosis; late relapse, relapse occurring ≥ 36 months from initial diagnosis.