POLE and uterine corpus endometrial carcinoma: Additionally, significantly higher percentages of young adult UCEC (uterine corpus endometrial carcinoma) were of the POLE (POLE-ultramutated, FDR = 2.55E-3) and CN low (copy number low, FDR = 0.030) subtypes, while a significantly lower percentage were of the CN high subtype (copy number high, FDR = 1.46E-4) (Figure 1C).