L1CAM and neoplasm: Multivariate Cox analysis revealed that FIGO (the International Federation of Gynecology & Obstetrics) Stage, progestin receptor, lymphovascular space invasion (LVSI), and tumor size were independent risk factors for low‐grade EC recurrence‐free survival (RFS), and FIGO Stage, L1CAM, LVSI, and pelvic lymph node status were independent risk factors for high‐grade EC.