Some breast cancers also have mutations in the ERBB2 gene that increase human epidermal growth factor receptor 2, or HER-2, which when activated, promotes the growth of cells.

一些乳腺癌也有ERBB2基因的突变，可以增加人表皮生长因子受体2（HER-2）的表达；当它HER-2被激活时，会促进细胞增长。