Fig. 5From: The trade-off of post-mastectomy radiotherapy usage for the breast cancer patients aged 70 years or older: a study based on SEER databaseCumulative incidence of breast cancer-specific mortality in (A) all patients, (B) T1N1 patients, and (C) T2N1 patients, stratified by receipt of postmastectomy radiation therapy (PMRT)Back to article page