Necessity of adjuvant concurrent chemo-radiotherapy in D2-resected LN-positive gastric cancer

Jeong Il Yu, Do Hoon Lim, Jeeyun Lee, Won Ki Kang, Se Hoon Park, Joon Oh Park, Young Suk Park, Ho Yeong Lim, Seung Tae Kim, Su Jin Lee, Sung Kim, Tae Sung Sohn, Jun Ho Lee, Ji Yeong An, Min Gew Choi, Jae Moon Bae, Hye Seung Kim, Soohyun Ahn

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13 Scopus citations

Abstract

Background and purpose: To investigate the role of adjuvant concurrent chemo-radiotherapy (CCRT) by analyzing the outcomes of adjuvant CCRT versus chemotherapy alone (CA) in patients with D2-resected gastric cancer with lymph node (LN) metastasis. Materials and methods: Patients with gastric cancer from the institutional registry who underwent curative D2 and R0 resection from December 2004 to January 2013 followed by adjuvant CCRT or CA and demonstrated pathologically confirmed LN metastasis without distant metastasis were included in the study. Results: A total of 1633 patients were included (909 patients in the adjuvant CCRT group and 724 patients in the CA group), and median follow-up was 65.4 months (range, 3.9–141.7 months). There was a significant difference in age (p < 0.0001), Lauren's classification (p = 0.02), number of LN metastases (p < 0.0001), and pN stage (p < 0.0001) between the CCRT and CA groups. During follow-up, recurrence was detected in 419 (25.7%) of patients overall, 236 (26.0%) in the CCRT group, and 183 (25.3%) in the CA group. Recurrence-free survival (RFS) was not significantly different between the CCRT and CA groups in univariable analysis (p = 0.92). After adjustment, pT/pN stage and perineural invasion showed statistical significance in multivariable Cox regression analysis; however, RFS was significantly higher in the CCRT group (p = 0.03, hazard ratio 0.801, 95% confidence interval 0.658–0.975). Conclusions: The adjusted RFS was significantly higher in the CCRT group than the CA group in patients with D2 resected LN metastatic gastric cancer.

Original languageEnglish
Pages (from-to)306-312
Number of pages7
JournalRadiotherapy and Oncology
Volume129
Issue number2
DOIs
StatePublished - Nov 2018

Bibliographical note

Funding Information:
This research was partly supported by a Basic Science Research Program through the National Research Foundation of Korea ( NRF ) funded by the Ministry of Education ( NRF-2017R1D1A1B03031275 ), and a grant from the Marine Biotechnology Program ( 20150220 ) funded by the Ministry of Oceans and Fisheries , Korea.

Funding Information:
This research was partly supported by a Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1D1A1B03031275), and a grant from the Marine Biotechnology Program (20150220) funded by the Ministry of Oceans and Fisheries, Korea.

Publisher Copyright:
© 2018

Keywords

  • Adjuvant
  • Chemotherapy
  • Concurrent chemo-radiotherapy
  • Gastric cancer
  • Recurrence

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