PGR and triple-negative breast carcinoma: PUS1 expression was positively correlated with triple-negative breast cancer (TNBC) status (P= 0.020) and tumor grade (P <0.0001), but not with age (P= 0.736), tumor size (P= 0.608), lymph node (P= 0.742), oestrogen receptor (ER) (P= 0.162), progesterone receptor (PR) (P= 0.901), human epidermal growth factor receptor 2 (HER2) (P= 0.608) or tumor stage (P= 0.411).