ESR1 and endometrial carcinoma: Endometrial carcinoma;Endometrioid cancer;FIGO Grade 2 (Adenoid/cribriform/papillary/solid 10%)Location: Diffused in the cavityTumor size: 6 × 4.5 × 1 cmMyometrium invasion: <1/2, MELF infiltration was observed;Uterine serous membrane: not involvedPara-uterine tissue: NoneVaginal: NoneCervical invasion: cervical mucosa involvedLVSI: less than half of the myometrium with focal LVSI;Adnexal: none;Lymph node status: Pelvic lymph node (−), para-aortic lymph node (−)Immunohistology: wild type P53, ER(high positive, 90%+), PR(high positive, 40%+)