Substantial LVSI Is Independently Associated with Para-Aortic Nodal Metastasis in Patients Undergoing Laparoscopic...

Lymphovascular space invasion (LVSI) is a well-established prognostic factor in endometrial cancer; however, its independent contribution to para-aortic nodal metastasis remains incompletely defined. Identifying factors associated with nodal dissemination is important for surgical staging and postoperative management. This retrospective, single-center cohort study included 121 patients with endometrial cancer who underwent laparoscopic pelvic and para-aortic lymphadenectomy. The cohort was predominantly obese (median BMI: 32 kg/m²). Clinicopathological variables were analyzed using univariable and multivariable logistic regression models to identify associations with lymph node metastasis and para-aortic lymph node metastasis. Lymph node metastasis was observed in 16.5% of patients, including para-aortic involvement in 9.9%. In univariable analysis, the LVSI category was significantly associated with lymph node metastasis (p = 0.002), with substantial LVSI being present in 50.0% of patients with nodal metastasis compared with 14.9% of those without. LVSI was categorized as negative, focal, or substantial. In multivariable logistic regression analyses using negative LVSI as the reference category, substantial LVSI remained independently associated with both overall nodal metastasis (OR 5.44, 95% CI 1.67-17.65, p = 0.005) and para-aortic nodal metastasis (OR 6.98, 95% CI 1.81-26.78, p = 0.005), whereas focal LVSI was not significantly associated with either outcome. These findings suggest that the extent of LVSI may be relevant to nodal metastasis, with substantial LVSI showing a stronger association than focal LVSI.