This arm includes patients with endometrioid adenocarcinoma of the endometrium of low- and intermediate-risk who will undergo a laparoscopic total hysterectomy and bilateral salpingo-oophorectomy with sentinel lymph node biopsy (SLNB) performed with near-infrared-guided surgery using indocyanine green (ICG).

Laparoscopic total hysterectomy, bilateral salpingo-oophorectomy (BSO), and sentinel lymph node (SLN) biopsy are executed by 1 of 5 experienced gynecologic oncologists. SLN mapping utilizes indocyanine green (ICG) at a standard concentration of 2.5 mg/mL - 1 mL is injected into the cervix at the 3 and 9 o'clock positions (total dose - 5 mg) to a depth of 5-10 mm, initiated right after general anesthesia induction. Diagnostic laparoscopy employs the Image 1S equipment (KARL STORZ©, Tuttlingen, Germany). Upon examination, fluorescence in the near-infrared spectrum is observed. Successful mapping is indicated by identifying a lymphatic vessel with at least one LN. Detected SLNs are then extracted, and the total hysterectomy with BSO is completed. SLN frozen section remains at the surgeon's discretion. If metastasis surfaces in the SLN either during the frozen section or routine assessment, the option for systematic LN dissection in a subsequent procedure exists although not mandatory.

The rate of change in postoperative treatment based on the SLNB results and postoperative histology (percentage). A change in postoperative treatment strategy is defined as any difference between treatment plans set by the tumor board before and after receiving the SLN biopsy information.

The rate of change in disease stage based on SLNB results and postoperative histology (percentage).

The rate of bilateral SLN detection (percentage).