Paraaortic lymphadenectomy in intermediate to high risk uterine endometrioid cancer : a retrospective evaluation

To investigate the impact on survival of paraaortic lymph node dissection (PALND) added to pelvic lymph node dissection (PLND) in patients with intermediate to high-risk endometrioid endometrial cancer (EC ). Surgical parameters and perioperative morbidity have been explored as well.

We retrospectively identified all eligible patients that received LND as part of their primary treatment at a single institution from January 2000 to December 2010. Survival curves for overall (OS), disease-specific (DSS) and disease-free (DFS) survival were plotted by the Kaplan-Meier method and compared by the log-rank test. Cox proportional hazards regression was used for multivariable analysis for OS and DSS.

93 patients underwent PLND plus PALND in their initial operation (PALND group) and 177 patients underwent PLND only (no-PALND group). Patients in the non-PALND group were older, more obese and had higher rates of comorbidities. The median number of PLN and PALN retrieved were 26 and 13 respectively. Isolated PALN metastasis was seen in 2 (2.1%) patients. PALND was associated with longer operative time, higher transfusion rate and longer hospital stay. PALND group had a benefit in OS (p=0.033), which did not persist in DSS or DFS. Furthermore, the type of LND did not significantly improve either OS or DSS according to the multivariate analysis results.

PALND had no therapeutic value per se in women with intermediate to high risk endometrioid tumors and the improvement seen in OS should rather be attributed to the better medical status of women who received PALND.