Table 2. Comparative Incidence for Genetic Features found in G-TL and C-TL.

	Percent Incidence (Frequency)
Feature	G-TL	C-TL	P-value
Trisomy 14	25% (3/12)	40% (8/20)	0.46
Trisomy 15	67% (8/12)	65% (13/20)	1.00
Notch1 5ʹ Deletion	31% (5/16)	49% (49/101)	0.28
Notch1 PEST Mutation	69% (11/16)	70% (71/101)	1.00
Notch1 HD Mutation	31% (5/16)	15% (15/101)	0.15
Ikzf1 LOH	19% (3/16)	27% (27/101)	0.76
Ikzf1 Mutation	56% (9/16)	42% (42/101)	0.29
Ikzf1 Mutation/Aberrant Expression	56% (9/16)	56% (57/101)	1.00
Trp53 Mutation	0% (0/16)	15% (15/101)	0.22
Trp53 Mutation/Null Expression	0% (0/16)	18% (18/101)	0.13
Bcl11b LOH	69% (11/16)	100% (101/101)	0.0001 *
Pten Mutation/Null Expression	80% (12/15)	38% (38/101)	0.004 *

P values shown are from Fisher’s Exact Test, with differences significant at the 0.05 level marked (*)