Tumors with low ING4 protein staining frequently have advanced tumor features.

*DCIS, ductal cell carcinoma in situ; †IDC, invasive ductal carcinoma; ‡ILC, invasive lobular carcinoma; §BRE, Bloom, Richardson, Elston-Ellis grading.* DCIS：导管原位癌（ductal cell carcinoma in situ）； † IDC：浸润性导管癌（invasive ductal carcinoma）； ‡ ILC：浸润性小叶癌（invasive lobular carcinoma）； § BRE：布鲁姆-理查森-埃尔斯顿-埃利斯分级（Bloom, Richardson, Elston-Ellis grading）。