Table 1.

Summary of ALL samples included in the study

Immuno-phenotype	Cytogenetic abnormality	Fusion gene	N	Median WBC at diagnosis, × 10^9/L (range)	Median age at diagnosis, years (range)
T-ALL	Various		18	173.5 (1–588)	11.9 (1.9–16.8)
BCP-ALL	HeH	–	42	9.6 (0.8–124)	3.6 (1.0–17.74
	t(12;21)	ETV6-RUNX1	18	6.5 (1.1–95)	4.9 (2.2–12.7)
	11q23/MLL	MLL-r	7	193 (1.8–744)	0.6 (0.5–1.7)
	t(9;22)	BCR-ABL1	6	88.3 (14.1–180)	12.1 (9.3–13.5)
	dic(9;20)	–	1	41.8 (41.8–41.8)	4.4 (4.4–4.4)
	Various (BCP-ALL “other”)a	–	42	7.9 (0–213)	8.8 (1.4–17.7)
Total			134

^aBCP-ALL samples negative for targeted assays for known ALL cytogenetic aberrations with either non-recurrent aberrations, normal karyotypes, or no results available from cytogenetic analysis

WBC white blood cell count at diagnosis, MLL-r rearrangements involving the KMT2A (MLL) gene