ESR1 and neoplasm: When the data were analyzed according to the expression status of ER, PR, Her-2, and Ki67 in each tumor (Figure 5B–5E), significant survival differences were observed between FSIP1-positive status and FSIP1-negative status in patients with ER-positive and Her-2 negative tumors (p = 0.016 and 0.009, respectively; Figures 5F and 5G).