A multi-institutional analysis of sequential versus 'sandwich' adjuvant chemotherapy and radiotherapy for stage IIIC endometrial carcinoma

J Gynecol Oncol. 2019 May;30(3):e28. doi: 10.3802/jgo.2019.30.e28.

Abstract

Objective: To analyze the outcomes of sequential or sandwich chemotherapy (ChT) and radiotherapy (RT) in patients with node-positive endometrial cancer (EC).

Methods: Data from 4 centers were collected retrospectively for 179 patients with stage IIIC EC treated with postoperative RT and ChT (paclitaxel and carboplatin). Patients were either treated with 6 cycles of ChT followed by RT (sequential arm; 96 patients) or with 3 cycles of ChT, RT, and an additional 3 cycles of ChT (sandwich arm; 83 patients). Prognostic factors affecting overall survival (OS) and progression-free survival (PFS) were analyzed.

Results: The 5-year OS and PFS rates were 64% and 59%, respectively, with a median follow-up of 41 months (range, 5-167 months). The 5-year OS rates were significantly higher in the sandwich than sequential arms (74% vs. 56%; p=0.03) and the difference for 5-year PFS rates was nearly significant (65% vs. 54%; p=0.05). In univariate analysis, treatment strategy, age, International Federation of Gynecology and Obstetrics (FIGO) stage, pathology, rate of myometrial invasion, and grade were prognostic factors for OS and PFS. In multivariate analysis, non-endometrioid histology, advanced FIGO stage, and adjuvant sequential ChT and RT were negative predictors for OS, whereas only non-endometrioid histology was a prognostic factor for PFS.

Conclusion: Postoperative adjuvant ChT and RT for stage IIIC EC patients, either given sequentially or sandwiched, offers excellent clinical efficacy and acceptably low toxicity. Our data support the superiority of the sandwich regimen compared to the sequential strategy in stage IIIC EC patients for OS.

Keywords: Chemotherapy; Endometrial Cancer; Lymphatic Metastasis; Radiotherapy; Surgery.

Publication types

  • Multicenter Study

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Antineoplastic Combined Chemotherapy Protocols / administration & dosage*
  • Antineoplastic Combined Chemotherapy Protocols / adverse effects
  • Carcinoma, Endometrioid / mortality
  • Carcinoma, Endometrioid / pathology
  • Carcinoma, Endometrioid / therapy*
  • Chemoradiotherapy, Adjuvant / adverse effects
  • Chemoradiotherapy, Adjuvant / methods
  • Chemotherapy, Adjuvant / adverse effects
  • Chemotherapy, Adjuvant / methods*
  • Combined Modality Therapy
  • Dose Fractionation, Radiation
  • Drug Administration Schedule
  • Endometrial Neoplasms / mortality
  • Endometrial Neoplasms / pathology
  • Endometrial Neoplasms / therapy*
  • Female
  • Humans
  • Hysterectomy
  • Middle Aged
  • Neoplasm Staging
  • Radiotherapy, Adjuvant / adverse effects
  • Radiotherapy, Adjuvant / methods*
  • Retrospective Studies
  • Survival Analysis