The aim of this study was to look at the impact of the number of sites with tumour involvement on outcome for patients with stage IIIA endometrioid-type endometrial carcinoma.
Patients and methods: 141 patients stage IIIA were included. A central histopathological review was performed. Patients staged solely on the presence of a positive peritoneal washing were excluded. Follow-up ranged from 2 to 217 months with a median of 43 months. Endpoints of the study were locoregional recurrence rates, distant metastasis-free survival (DMFS), disease-free survival (DFS) and disease-specific survival (DSS).
Results: In multivariate analyses the number of involved sites showed to be the only independent significant variable for DMFS, DFS, and DSS with a Hazard Ratio of 2.1, 2.2, and 2.2, respectively. The DSS was significantly related to the number of involved sites, with a 5-year DSS of 70.4% for one site, 42.8% for two sites, and 43.9% for three sites, respectively (p = 0.001).
Conclusion: The number of involved sites outside the corpus uterine for stage IIIA seems to be a strong negative prognostic factor for stage IIIA endometrial carcinoma.