Patterns of failure after adjuvant "sandwich" chemo-radio-chemotherapy in locally advanced (stage III-IVA) endometrial cancer.

Purpose: To investigate oncological outcomes and patterns of recurrence of patients undergoing adjuvant "sandwich" chemo-radio-chemotherapy for locally advanced endometrial cancer.

Methods: This is a multi-institutional retrospective study evaluating chart of consecutive patients undergoing chemo-radio-chemotherapy for FIGO stage III-IVA endometrial caner.

Results: The study population included 45 patients who had adjuvant sandwich regimen. Median age of the study population was 66 years. The majority of patients were diagnosed with endometrioid histology and with stage III disease. After a median follow-up of 35 months, 15 patients developed recurrent disease. Three-year disease-free and overall survivals was 45% and 81%, respectively. Three-years site-specific disease-free survival was 85%, 92% and 48% for local, loco-regional, and distant recurrence, respectively. All patients included in the study had nodal dissection. Nodal assessment included: sentinel node mapping, sentinel node mapping plus backup lymphadenectomy and lymphadenectomy in 15, 6 and 24 patients, respectively. The latter group included four patients detected by suspected enlarged nodes, intraoperatively. Even after the exclusion of patients with enlarged nodes, the type of nodal assessment did not impact on survival outcomes (p > 0.2). Positive peritoneal cytology was the only factor associated with an increased risk of developing (any site) recurrence and distant-specific recurrence, independently. No factor predicted for overall survival.

Conclusion: Adjuvant "sandwich" chemo-radio-chemotherapy for locally advanced endometrial cancer guarantee promising local and loco-regional controls, but distant failure rate is high, thus suggesting the need for applying other systemic treatment strategies for these patients.