Table 3.

High Frequency Copy Number Alterations in Subtypes of Breast Cancer^*

Chromosomal arm	ER-positive (n=154)	ER-negative (n=105)	HER2-positive (n=35)	Triple Negative (n=65)
1p	Gain	Gain	Gain/Loss
1q	Gain	Gain	Gain/Loss	Gain
2p			Loss
2q			Loss
3p			Loss	Loss
3q			Loss
4p		Loss	Loss	Loss
4q			Loss
5p
5q		Loss		Loss
6p			Loss
6q			Loss
7p			Loss
7q			Loss
8p	Loss	Loss	Loss	Loss
8q	Gain	Gain	Gain/Loss	Gain
9p			Loss
9q			Loss
10p			Loss
10q	Loss	Loss	Loss	Loss
11p		Loss	Loss	Loss
11q	Loss	Loss	Loss	Loss
12p			Loss
12q	Loss	Loss	Loss	Loss
13q				Loss
14q			Loss	Loss
15q			Loss	Loss
16p			Loss
16q	Loss	Loss	Loss	Loss
17p			Loss
17q			Gain/Loss
18p
18q			Loss
19p			Loss
19q			Loss
20p		Loss		Loss
20q				Loss
21p
21q
22p
22q		Loss	Loss
Xp
Xq			Loss

^*High-frequency CNA (weighted fraction >40% of tumors) mapped by chromosomal arm.