Journal of Gastric Cancer

The Korean Gastric Cancer Association (대한위암학회)
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Comparison of the Prognosis of Upper-Third Gastric Cancer With That of Middle and Lower-Third Gastric Cancer

  • Ji Yeon Park (Department of Surgery, Kyungpook National University Chilgok Hospital) ;
  • Eun Ji Kim (Department of Surgery, Kyungpook National University Chilgok Hospital) ;
  • Jae Yeong Yang (Department of Surgery, Kyungpook National University Chilgok Hospital) ;
  • Ki Bum Park (Department of Surgery, Kyungpook National University Chilgok Hospital) ;
  • Oh Kyoung Kwon (Department of Surgery, Kyungpook National University Chilgok Hospital)
  • Received : 2023.08.10
  • Accepted : 2023.11.23
  • Published : 2024.04.01
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Abstract

Purpose: Gastric cancer is one of the most common cancers in Korea, and the proportion of upper-third gastric cancers has been steadily increasing over the last two decades. This study aimed to evaluate the effect of tumor location on gastric cancer prognosis. Materials and Methods: We retrospectively reviewed 2,466 patients who underwent gastrectomy for pathologically proven gastric cancer between January 2011 and December 2016. The patients were divided into an upper-third group (U group; n=419, 17.0%) and a middle- and lower-third group (ML group; n=2,047, 83.0%). Clinicopathological characteristics, overall survival (OS), and recurrence-free survival (RFS) after surgery were compared. Results: The U group had more advanced disease than the ML group and a higher incidence of N3b disease for T3 (12.0% vs. 4.9%, p=0.023) and T4 tumors (33.3% vs. 17.5%, p=0.001). The 5-year RFS rate for stage III disease was marginally lower in the U group than that in the ML group (47.1% vs. 56.7%, p=0.082). The upper third location was an independent prognostic factor for both OS (hazard ratio [HR], 1.350; 95% confidence interval [CI], 1.065-1.711) and RFS (HR, 1.430; 95% CI, 1.080-1.823). Conclusions: Upper-third gastric cancer shows extensive node metastasis compared to those located more distally in ≥T3 tumors. The upper third location is an independent prognostic factor for both OS and RFS and may have an adverse impact on RFS, particularly in patients with stage III gastric cancer.

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References

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