skip to main content

SciTech ConnectSciTech Connect

Title: Performance of a Nomogram Predicting Disease-Specific Survival After an R0 Resection for Gastric Cancer in Patients Receiving Postoperative Chemoradiation Therapy

Purpose: The internationally validated Memorial Sloan-Kettering Cancer Center (MSKCC) gastric carcinoma nomogram was based on patients who underwent curative (R0) gastrectomy, without any other therapy. The purpose of the current study was to assess the performance of this gastric cancer nomogram in patients who received chemoradiation therapy after an R0 resection for gastric cancer. Methods and Materials: In a combined dataset of 76 patients from the Netherlands Cancer Institute (NKI), and 63 patients from MSKCC, who received postoperative chemoradiation therapy (CRT) after an R0 gastrectomy, the nomogram was validated by means of the concordance index (CI) and a calibration plot. Results: The concordance index for the nomogram was 0.64, which was lower than the CI of the nomogram for patients who received no adjuvant therapy (0.80). In the calibration plot, observed survival was approximately 20% higher than the nomogram-predicted survival for patients receiving postoperative CRT. Conclusions: The MSKCC gastric carcinoma nomogram significantly underpredicted survival for patients in the current study, suggesting an impact of postoperative CRT on survival in patients who underwent an R0 resection for gastric cancer, which has been demonstrated by randomized controlled trials. This analysis stresses the need for updating nomograms with the incorporation of multimodal strategies.
Authors:
 [1] ;  [2] ;  [1] ; ;  [3] ;  [4] ;  [1] ;  [5] ;  [6] ;  [7] ;  [6] ;  [5]
  1. Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York (United States)
  2. (Netherlands)
  3. Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York (United States)
  4. Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York (United States)
  5. Department of Radiotherapy, The Netherlands Cancer Institute–Antoni van Leeuwenhoek Hospital, Amsterdam (Netherlands)
  6. Department of Gastroenterology, The Netherlands Cancer Institute–Antoni van Leeuwenhoek Hospital, Amsterdam (Netherlands)
  7. Department of Surgery, Leiden University Medical Center, Leiden (Netherlands)
Publication Date:
OSTI Identifier:
22416464
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Radiation Oncology, Biology and Physics; Journal Volume: 88; Journal Issue: 3; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; CARCINOMAS; CHEMOTHERAPY; COMBINED THERAPY; GASTRECTOMY; NOMOGRAMS; PATIENTS; RADIOTHERAPY