Time interval between neoadjuvant chemoradiotherapy and surgery for oesophageal or junctional cancer: A nationwide study. (March 2018)

• Record Type: Journal Article
• Authors: van der Werf, L.R.; Dikken, J.L.; van der Willik, E.M.; van Berge Henegouwen, M.I.; Nieuwenhuijzen, G.A.P.; Wijnhoven, B.P.L.
• Is Part Of: European journal of cancer. Volume 91(2018)
• Page Start: 76
• Page End: 85
• Publication Date: 2018-03
• Subjects: Neoadjuvant chemoradiotherapy -- Oesophageal carcinoma -- Oesophageal surgery -- Time-to-treatment -- Treatment outcome -- Pathological complete response; Cancer -- Periodicals; Neoplasms -- Periodicals; Cancer -- Périodiques; Cancer; Tumors; Electronic journals; Periodicals; Electronic journals; 616.994
• DOI: 10.1016/j.ejca.2017.12.009
• Languages: English
• ISSNs: 0959-8049

Abstract

Abstract: Introduction: The optimal time between end of neoadjuvant chemoradiotherapy (nCRT) and oesophagectomy is unknown. The aim of this study was to assess the association between this interval and pathologic complete response rate (pCR), morbidity and 30-day/in-hospital mortality. Methods: Patients with oesophageal cancer treated with nCRT and surgery between 2011 and 2016 were selected from a national database: the Dutch Upper Gastrointestinal Cancer Audit (DUCA). The interval between end of nCRT and surgery was divided into six periods: 0–5 weeks (n = 157 ;A), 6–7 weeks (n = 878 ;B), 8–9 weeks (n = 972 ;C), 10–12 weeks (n = 720 ;D), 13–14 weeks (n = 195 ;E) and 15 or more weeks (n = 180 ;F). The association between these interval groups and outcomes was investigated using univariable and multivariable analysis with group C (8–9 weeks) as reference. Results: In total, 3102 patients were included. The pCR rate for the groups A to F was 31%, 28%, 26%, 31%, 40% and 37%, respectively. A longer interval was associated with a higher probability of pCR (≥10 weeks for adenocarcinoma: odds ratio [95% confidence interval]: 1.35 [1.00–1.83], 1.95 [1.24–3.07], 1.64 [0.99–2.71] and ≥13 weeks for squamous cell carcinoma: 2.86 [1.23–6.65], 2.67 [1.29–5.55]. Patients operated ≥10 weeks after nCRT had the same probability for intraoperative/postoperative complications. Patients from groups D and F had a higher 30-day/in-hospital mortality (1.80 [1.08–3.00], 3.19 [1.66–6.14]). Conclusion: An interval of ≥10 weeks for adenocarcinoma and ≥13 weeks for squamous cell carcinoma between nCRT and oesophagectomy was associated with a higher probability of having a pCR. Longer intervals were not associated with intraoperative/postoperative complications. The 30-day/in-hospital mortality was higher in patients with extended intervals (10–12 and ≥15 weeks); however, this might have been due to residual confounding. Highlights: The interval between end of nCRT and oesophagectomy for cancer is associated with pathological response. An extended interval is associated with higher pathological complete response rate. These intervals are not associated with intraoperative and postoperative complications. Higher 30-day/in-hospital mortality was observed for intervals of 10–12 and 15 or more weeks. The higher 30-day/in-hospital mortality might be due to selection bias and residual confounding.