Table 2.

Comparison on the Frequency of Increased 17q23 Copy Number Between Primary Tumors and Metastases from the Same Tumor Category^*

Organ/anatomic site	Tumor category	Frequency of increased copy number (n†)		Statistical significance
		Primary tumors	Metastases
Colon	Adenocarcinoma	0.4% (276)	9% (32)	P = 0.004
Mammary gland	Carcinoma, ductal	22% (41)	40% (342)	P = 0.03
Mammary gland	Carcinoma, lobular	7% (28)	16% (69)	n.s.‡
Oral cavity	Squamous cell carcinoma	5% (19)	12% (26)	n.s.‡
Prostate	Adenocarcinoma	3% (63)	31% (13)	P = 0.007

*For tumor categories with 10 or more evaluable specimens.

^†Total number of tumors evaluated.

^‡Not significant.