ESR1 and neoplasm: In addition, GATA2hi FIGO stage I USCs had the same tumor size (Figure 2C), the same incidence of uterine LVI and positive pelvic washings, and the same expression of ER, PR, and Erb-B2 Receptor Tyrosine Kinase 2 (Her2) compared with GATA2lo USCs (Supplemental Table 11).