PGR and neoplasm: In addition, the presence of CD44+/CD24-/low was closely associated with lymph node status (P < 0.001), tumor size (P < 0.001), progesterone receptor (PR) expression (P = 0.016), Ki67 (P < 0.001), and different molecular subtypes (P < 0.001); AR expression was correlated with histological grade (P = 0.023) and different molecular subtypes (P = 0.028); Let-7a was correlated with lymph node status (P = 0.002), pTNM stage (P = 0.016), Ki67 (P = 0.002), and different molecular subtypes (P = 0.021, Table 2).