Experience with endometrial carcinoma (EC): A population-based study in Tarragona Province (Spain)

Abstract

e16550 Background: To evaluate outcome, failure patterns, prognostic factors and radiotherapy (RT) toxicity after postoperative RT for EC in Tarragona Province (Spain). Methods: A retrospective population-based review on 232 patients (pts) between 1997 and 2000 from different gynaecological Dpt. and in a single oncologist institution with RT Units. Multivariate analysis of disease-free survival (DFS), overall survival (OS), adjuvant RT, RT toxicity (RTOG), prognostic factors for survival, and the distance in Km to the RT Units. Results: Mean age: 64 years (35–88). Distance to RT Units >70 Km in 15% pts. Median follow-up: 70 months (2–132). FIGO Stage (S): 8.2% IA; 36.2% IB; 19% IC; 7.8% IIA; 6.5% IIB; 7.3% IIIA; 1.3% IIIB; 3.4% IIIC; 2.6% IVA; 2.2 IVB. Pathology: endometrioid 74.5%, papillary 3.9%, serous 3.4%, clear-cell 2.2%, squamous cell 3%, adenosquamous 1.3%, mixed 3.9%. Grade (G): 35.7% G1, 45.3% G2, 19% G3; miometrial invasion: 44.1% >50%, 46% <50%, 9.9% not invasion. Treatment: 1) Surgery in 93.5%, 49.6% lymph nodes dissection. 2) RT in 73.5%: 47% external beam radiotherapy (EBI) and brachytherapy (BT), 9.4% BT alone, 17.1% EBI alone. 3) Chemotherapy in 11.1% and hormonal treatment in 6.9%. 3). Grade 3 and 4 toxicity: 12 (9%) pts, 6 early and 6 late. Relapses: 26/232 (11.6%), S-I: 11/26 (42%), S-II: 1/26 (3.8%), S-III: 5/26 (19.2%), S-IV: 3/26 (11.5%). Metastasis: 28/232 (12.5%). Survivals at 5 years: 1) OS in all stages was 78.8% and 83%, 89.6%, and 76% for SI, SII, and SIII, respectively. 2) DFS was 76.5% for all pts and 82.3%, 86.22%, and 68.24% for SI, SII, and SIII, respectively. Multivariate analysis: significant prognostic factors for poor outcome were age (p < 0.01), lymph nodes dissection (p < 0.001), pathologic subtype (p < 0.001), grade of differentiation (p < 0.001), and deep myometrial invasion (p < 0.005). Conclusions: Survivals, RT toxicity and relapse sites were similar to the other reported series. Predictors of poor outcome were age, lymph nodes dissection, pathology subtype, grade of differentiation, and deep myometrial invasion. Patients of Tarragona Province are in need of a better accessibility to the radiation units. No significant financial relationships to disclose.