title: Pylorus-Preserving Surgery Based on the Sentinel Node Concept in Early Gastric Cancer.
abstract: In patients with early stage gastric cancer in the middle third of the stomach, pylorus-preserving gastrectomy (PPG) can be an option as function-preserving surgery, although its oncologic safety is not definitively defined. This issues may be overcome using the sentinel node (SN) concept. The aim of this study was to investigate the effectiveness of the SN concept in early gastric cancer patients who are candidates for PPG.
  
  
  
  One hundred fifty-six patients with middle-third location of cT1N0 gastric cancer (single lesion, <4 cm) underwent distal gastrectomy with SN mapping. As a tracer, technetium-99 tin colloid solution and blue dye were endoscopically injected into the submucosal layer surrounding the primary tumor.
  
  
  
  SN detection rate was 100 % (156 of 156), and the accuracy of the nodal evaluation of metastasis was 99 % (155 of 156). Suprapyloric lymph node (LN; LN No. 5) and infrapyloric LN (LN No. 6) were detected as SNs in 6 and 14 % of the patients, respectively. We also found two cases with metastasis to LN No. 5 or LN No. 6.
  
  
  
  When performing PPG, the possibility of LN metastasis, especially to LN No. 5 and LN No. 6, cannot be underestimated. SN mapping can play an important role to predict the possibility of metastasis to LN No. 5 and LN No. 6.
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Ayako
authors.initials: A
authors.lastname: Shimada
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan. htakeuchi@a6.keio.jp.
authors.forename: Hiroya
authors.initials: H
authors.lastname: Takeuchi
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Taiki
authors.initials: T
authors.lastname: Ono
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kamiya
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Fukuda
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Rieko
authors.initials: R
authors.lastname: Nakamura
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Tsunehiro
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Norihito
authors.initials: N
authors.lastname: Wada
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Kawakubo
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Saikawa
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Tai
authors.initials: T
authors.lastname: Omori
authors.affiliation: Department of Radiology, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Tadaki
authors.initials: T
authors.lastname: Nakahara
authors.affiliation: Department of Radiology, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Jinzaki
authors.affiliation: Department of Radiology, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Murakami
authors.affiliation: Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Kitagawa
mesh_terms: D000368:Aged; D005260:Female; D005743:Gastrectomy / Q000379:methods; D006801:Humans; D008197:Lymph Node Excision; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D059351:Organ Sparing Treatments; D018579:Patient Selection; D011708:Pylorus / Q000601:surgery*; D019275:Radiopharmaceuticals; D012189:Retrospective Studies; D000071036:Sentinel Lymph Node / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D013274:Stomach Neoplasms / Q000473:pathology* / Q000601:surgery*; D017556:Technetium Compounds; D017971:Tin Compounds; D047368:Tumor Burden
chemical_list: D019275:Radiopharmaceuticals; D017556:Technetium Compounds; D017971:Tin Compounds; C033493:technetium Tc 99m tin colloid