Table 2.

Class comparison test for genes associated with brain metastases in tumor groups.

Symbol	Probe set	P value	Geometric mean of intensities (Primary breast cancers /Brain meta)
BNC1	206581_at	0.98	0.99
ST6GALNAC5	220979_s_at	0.95	0.97
PTGS2	204748_at	0.55	0.72
HBEGF	38037_at	0.23	1.46
RET	205879_x_at	0.28	1.38
EGFR	201984_s_at	0.58	1.27
ERBB3	202454_s_at	0.89	1.04