Table 2 Summary of fluorescence in situ hybridisation results

Signals
Split-apart probes	ETV6 split-apart (AB) (105 cells analysed)	NTRK3 split-apart (CD) (119 cells analysed)
Fusion gene probes	Fusion gene probe 1 (AC) (86 cells analysed)	Fusion gene probe 2 (BD) (101 cells analysed)
Single red	6	0
2 copies of red	25	0
Single green	0	17
2 copies of green	0	2
Paired red–green	19	14
Paired red–green and 1 extra red	15	0
Paired red–green and 2 extra red	40	0
Paired red–green and 1 extra green	0	22
Paired red–green and 2 extra green	0	64
Paired red–green and 1 extra green and 1 extra red	0	0
Total number of split-apart	86	105
Single red	0	8
2 copies of red	0	1
Single green	0	18
2 copies of green	0	6
1 green and 1 red	0	60
1 green and 2 red	2	8
Fusion gene	16	0
Fusion gene and 1 extra green and 1 extra red	1	0
Double fusion gene	8	0
Double fusion gene and 1 extra red	2	0
Double fusion gene and 2 extra red	0	0
Double fusion gene and 1 extra green	36	0
Double fusion gene and 2 extra green	11	0
Double fusion gene and 1 extra green and 1 extra red	10	0
Total number with single fusion gene	17	0
Total number with double the fusion gene	67	0
Modal population	Two copies of fusion gene and 1 extra green	1 green and 1 red