IL9 and endometrial carcinoma: To explore the associations between molecular subtypes, clinical indicators, gene expression, and prognosis, subgroup analyses were performed based on four molecular subtypes of endometrial carcinoma (EC): POLE mutation (POLE), microsatellite instability (MSI), copy number low (CNL), and copy number high (CNH).No statistically significant differences were observed in clinical indicators [TIME, CA125, CA199, hemoglobin (Hb), red blood cell count (RBC), platelet count (PLT), white blood cell count (WBC), and interleukin-9 (IL-9)] among the four molecular subtypes (all P > 0.05; Table 4).