An analysis of TCGA data from clinical specimens from patients with triple-negative breast cancer (TNBC) showed that the expression of immune regulatory genes, including CD8 + T-cell attracting chemokine genes (CCL5, CXCL9, CXCL10) and the gene encoding the immune checkpoint molecule PD-L1, was negatively associated with the levels of histone lysine specific demethylase 1 (LSD1). Here, KDM1A is linked to triple-negative breast carcinoma.