Short somatic alterations at the site of copy number variation in breast cancer.

Copy number alterations of 52, 35, and 35 genes also showed highly significant correlations ( P < .001) with ER negativity (positive in 14 tumors vs negative in 6 tumors), PgR‐negativity (positive in 11 tumors vs negative in 9 tumors), and higher Ki‐67 labeling indexes (less than 20% in 12 tumors vs 20% or higher in 8 tumors), respectively.

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