Effect of pathologic tumor response and nodal status on survival in the Medical Research Council Adjuvant Gastric Infusional Chemotherapy trial

Smyth, E. C. et al. (2016) Effect of pathologic tumor response and nodal status on survival in the Medical Research Council Adjuvant Gastric Infusional Chemotherapy trial. Journal of Clinical Oncology, 34(23), pp. 2721-2727. (doi: 10.1200/JCO.2015.65.7692) (PMID:27298411) (PMCID:PMC5019747)

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Abstract

Purpose: The Medical Research Council Adjuvant Gastric Infusional Chemotherapy (MAGIC) trial established perioperative epirubicin, cisplatin, and fluorouracil chemotherapy as a standard of care for patients with resectable esophagogastric cancer. However, identification of patients at risk for relapse remains challenging. We evaluated whether pathologic response and lymph node status after neoadjuvant chemotherapy are prognostic in patients treated in the MAGIC trial. Materials and Methods: Pathologic regression was assessed in resection specimens by two independent pathologists using the Mandard tumor regression grading system (TRG). Differences in overall survival (OS) according to TRG were assessed using the Kaplan-Meier method and compared using the log-rank test. Univariate and multivariate analyses using the Cox proportional hazards method established the relationships among TRG, clinical-pathologic variables, and OS. Results: Three hundred thirty resection specimens were analyzed. In chemotherapy-treated patients with a TRG of 1 or 2, median OS was not reached, whereas for patients with a TRG of 3, 4, or 5, median OS was 20.47 months. On univariate analysis, high TRG and lymph node metastases were negatively related to survival (Mandard TRG 3, 4, or 5: hazard ratio [HR], 1.94; 95% CI, 1.11 to 3.39; P = .0209; lymph node metastases: HR, 3.63; 95% CI, 1.88 to 7.0; P < .001). On multivariate analysis, only lymph node status was independently predictive of OS (HR, 3.36; 95% CI, 1.70 to 6.63; P < .001). Conclusion: Lymph node metastases and not pathologic response to chemotherapy was the only independent predictor of survival after chemotherapy plus resection in the MAGIC trial. Prospective evaluation of whether omitting postoperative chemotherapy and/or switching to a noncross-resistant regimen in patients with lymph node-positive disease whose tumor did not respond to preoperative epirubicin, cisplatin, and fluorouracil may be appropriate.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Braconi, Dr Chiara and Valeri, Dr Nicola
Authors: Smyth, E. C., Fassan, M., Cunningham, D., Allum, W. H., Okines, A. F.C., Lampis, A., Hahne, J. C., Rugge, M., Peckitt, C., Nankivell, M., Langley, R., Ghidini, M., Braconi, C., Wotherspoon, A., Grabsch, H. I., and Valeri, N.
College/School:College of Medical Veterinary and Life Sciences > School of Cancer Sciences
Journal Name:Journal of Clinical Oncology
Publisher:American Society of Clinical Oncology
ISSN:0732-183X
ISSN (Online):1527-7755
Published Online:13 June 2016
Copyright Holders:Copyright © 2016 American Society of Clinical Oncology
First Published:First published in Journal of Clinical Oncology 34(23): 2721-2727
Publisher Policy:Reproduced under a Creative Commons License

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