Survival Outcomes after Lymphadenectomy in Early-Stage Mucinous Ovarian Cancer: An Asian Institutional Experience
摘要
Mucinous ovarian carcinoma (MOC) is often diagnosed at an early stage with a low prevalence of nodal metastasis. The benefit of routine lymphadenectomy (LND) in this setting remains uncertain. This study evaluated whether lymphadenectomy confers improved survival outcomes in women with early-stage MOC.
MethodsWe conducted a retrospective cohort study of women with stage I–II MOC who underwent primary surgery at a tertiary university-affiliated hospital between 2009 and 2016. Patients were categorized into LND and non-LND groups. The primary endpoint was overall survival (OS), and the secondary endpoint was progression-free survival (PFS). Survival was estimated by Kaplan–Meier analysis with log-rank testing, and Cox proportional hazards models were applied to identify prognostic factors.
ResultsOf 256 patients screened, 121 were eligible (75 LND, 46 non-LND). No nodal metastases were identified in the LND group. Median operative time was significantly longer with LND (240 vs. 195 min, P < 0.001). Postoperative complications occurred exclusively in the LND group (lymphocyst, small bowel serosal injury). At a median follow-up of 99.7 months, 5 year OS was 97.3% in the LND group versus 91.3% in the non-LND group, an absolute difference of 6% that did not reach statistical significance. LND was not associated with improved OS or PFS in univariable or multivariable analyses.
ConclusionRoutine lymphadenectomy does not improve survival in early-stage MOC but increases operative morbidity. Given the excellent prognosis of early-stage disease and the low risk of nodal involvement, omission of lymphadenectomy may be appropriate, particularly in stage I patients.