Original Article
Copyright ©2011 Baishideng Publishing Group Co., Limited. All rights reserved.
World J Gastroenterol. Aug 7, 2011; 17(29): 3390-3397
Published online Aug 7, 2011. doi: 10.3748/wjg.v17.i29.3390
Trend in gastric cancer: 35 years of surgical experience in Japan
Keishi Yamashita, Shinichi Sakuramoto, Masayuki Nemoto, Tomotaka Shibata, Hiroaki Mieno, Natsuya Katada, Shiroh Kikuchi, Masahiko Watanabe
Keishi Yamashita, Shinichi Sakuramoto, Masayuki Nemoto, Tomotaka Shibata, Hiroaki Mieno, Natsuya Katada, Shiroh Kikuchi, Masahiko Watanabe, Department of Surgery, Kitasato University School of Medicine, Kitasato 1-15-1, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan
Author contributions: Yamashita K contributed to study design, acquisition of data, analysis, interpretation of data, drafting and critical revision of the article; Sakuramoto S contributed to study design, acquisition of data, analysis, interpretation of data, drafting and critical revision of the article; Nemoto M, Shibata T, Mieno H, Katada N and Kikuchi S contributed to study design and acquisition of data; Watanabe M contributed to study design, and gave final approval of the version to be published.
Supported by Japanese Foundation for Multidisciplinary Treatment of Cancer.
Correspondence to: Masahiko Watanabe, MD, PhD, FACS, Professor, Department of Surgery, Kitasato University School of Medicine, Kitasato-1-15-1, Sagamihara, Kanagawa 228-8555, Japan. gekaw@med.kitasato-u.ac.jp
Telephone: +81-42-7788111 Fax: +81-42-7789564
Received: August 7, 2010
Revised: February 15, 2011
Accepted: February 22, 2011
Published online: August 7, 2011
Abstract

AIM: To investigate the trend in gastric cancer surgery in the context of rapid therapeutic advancement in Japan and East Asia.

METHODS: A retrospective analysis was performed on 4163 patients who underwent gastric resection for gastric cancer with histological confirmation between 1971 and 2007 at the surgical unit in Kitasato University Hospital, to determine the trend in gastric cancer requiring surgery.

RESULTS: Gastric cancer requiring surgical resection increased in our hospital, but the incidence adjusted for population was constant during the observed period. Interestingly, the ratio of diffuse type/intestinal type gastric cancer was unexpectedly unchanged, and that of advanced/early gastric cancer (EGC) was, however, markedly reduced, while the actual incidence of potentially curative advanced gastric cancer tended to decrease. The incidence of EGC requiring surgery tended to increase as a whole, which is consistent with increased prevalence of endoscopic surveillance. As a result, overall survival and mortality of gastric cancer requiring gastric resection has recently markedly improved.

CONCLUSION: In Japan, planned interventions may improve surgical gastric cancer mortality, but an unexpected trend of persistent existence of intestinal type cancer suggests the need for more robust medical intervention.

Keywords: Histology; Age factors; Clinical classification; Prognosis; Disease progression; Gastric cancer