Table 1. Frequency of pre-B and B cell tumors induced by the Eμ-Myc transgene.

	Pre-B lymphoma*		B lymphoma*
Genotype	Frequency, %	Incidence at 11 wk,† %	Frequency, %	Incidence at 11 wk,† %
Bim+/+	6 of 18 (33)	11	12 of 18 (66)	0
Bim+/—	9 of 39 (23)	10	30 of 39 (77)‡	22
Bim—/—	3 of 11 (27)	34	9 of 11 (73)	57

^*Lymphomas were typed by flow cytometry of surface immunofluorescence: pre-B lymphoma (B220⁺ CD19⁺ IgM^—); and B lymphoma (B220⁺ CD19⁺ IgM⁺)

^†Cumulative incidence at 11 wk of age. The other tumor type was censored, so the incidence shown is independent of the competing risk of the other type

^‡The frequency of B lymphoma in Bim^+/— versus Bim^+/+ Eμ-Myc mice was not significantly different (P = 0.41)