title: Location characteristics of early gastric cancer treated with endoscopic submucosal dissection.
abstract: The timely detection of early gastric cancer (EGC) is important in performing endoscopic submucosal dissection (ESD). We attempted to determine the location characteristics of regions where EGC is frequently detected and analyzed the EGC characteristics associated with that location.
  
  
  
  We retrospectively reviewed the medical records of patients with EGC treated by ESD between November 2008 and August 2016. We retrospectively investigated and analyzed 647 EGC lesions.
  
  
  
  The patients' mean age was 66.7 ± 10.8 years. The patient population was predominantly male (77.1%, 499/647). A well-to-moderately differentiated carcinoma was observed in 97.2% of patients. The common site of carcinoma occurrence was the lower part of the stomach (the antrum and lower third of body, 89.6%). Among the stomach hemispheres, the lesser curvature side was the most frequent site of EGC (43.9%). The posterior side of EGC was more frequent than anterior side of EGC (20.4 vs. 15.6%, respectively). Submucosal invasive EGC was more frequent in the mid-to-upper parts of stomach than lower part of stomach (odds ratio 1.919; confidence interval 1.014-3.623; p = 0.045).
  
  
  
  Most EGCs that are resectable with ESD were found in the lower part and in the lesser curvature of the stomach. The submucosal invasive EGC was more frequent in the mid-to-upper part of stomach.
authors.affiliation: Department of Internal Medicine, Medical Research Institute, Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Beomeo-ri Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, 50612, Korea.
authors.forename: Dae Hwan
authors.initials: DH
authors.lastname: Kang
authors.affiliation: Department of Internal Medicine, Medical Research Institute, Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Beomeo-ri Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, 50612, Korea. drluckyace@gmail.com.
authors.forename: Cheol Woong
authors.identifier: 0000-0001-8867-3039
authors.initials: CW
authors.lastname: Choi
authors.affiliation: Department of Internal Medicine, Medical Research Institute, Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Beomeo-ri Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, 50612, Korea.
authors.forename: Hyung Wook
authors.initials: HW
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Medical Research Institute, Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Beomeo-ri Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, 50612, Korea.
authors.forename: Su Bum
authors.initials: SB
authors.lastname: Park
authors.affiliation: Department of Internal Medicine, Medical Research Institute, Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Beomeo-ri Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, 50612, Korea.
authors.forename: Su Jin
authors.initials: SJ
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Medical Research Institute, Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Beomeo-ri Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, 50612, Korea.
authors.forename: Hyeong Seok
authors.initials: HS
authors.lastname: Nam
authors.affiliation: Department of Internal Medicine, Medical Research Institute, Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Beomeo-ri Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, 50612, Korea.
authors.forename: Dae Gon
authors.initials: DG
authors.lastname: Ryu
mesh_terms: D000328:Adult; D000368:Aged; D055088:Early Detection of Cancer / Q000379:methods*; D000069916:Endoscopic Mucosal Resection / Q000379:methods*; D005260:Female; D005773:Gastroscopy / Q000379:methods*; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013270:Stomach / Q000473:pathology* / Q000601:surgery; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000473:pathology* / Q000601:surgery
keywords: Early gastric cancer; Endoscopic submucosal dissection; Location