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Gastric Cancer

, Volume 22, Issue 4, pp 723–730 | Cite as

Gastric lymphatic flows may change before and after endoscopic submucosal dissection: in vivo porcine survival models

  • Kyoko Nohara
  • Osamu GotoEmail author
  • Hiroya Takeuchi
  • Motoki Sasaki
  • Tadateru Maehata
  • Naohisa Yahagi
  • Yuko Kitagawa
Original Article

Abstract

Background and study aim

Standard gastrectomy with lymphadenectomy is recommended following endoscopic submucosal dissection (ESD) due to the risk of lymph-node metastasis for resected cancers. However, when lymphatic flows remain unchanged after ESD, a minimally invasive function-preserving surgery based on the sentinel node (SN) concept may be applicable. In this study, using porcine survival models, we aimed to investigate whether gastric lymphatic flows were modified following ESD.

Methods

Twelve pigs, each with one simulating lesion 3 cm in size, were used. Indocyanine green (ICG) fluid was endoscopically injected into the submucosa in four quadrants surrounding the lesion. Following laparoscopic observation of lymphatic flows, the lesions were resected by ESD. After 4 weeks, ICG fluid was injected in four quadrants surrounding the scar and lymphatic flows were observed in the same manner as the initial procedure. The distribution of lymphatic flows, including stained SNs, was compared.

Results

In ten lesions (83.3%), the distribution of flows remained unchanged. However, in one lesion, the flow along the right gastric epiploic artery (R-GEA) disappeared on the lesser curvature of the middle stomach. In addition, in one lesion, the flow along R-GEA emerged on the lesser curvature of the lower stomach.

Conclusions

Our study revealed that, despite ESD, lymphatic flows remained unchanged in most parts of the stomach. The SN concept may be applied after ESD, except for lesions on the lesser curvature. However, in the case of the lesser curvature, special care must be given to the SN concept.

Keywords

Sentinel lymph node Early gastric cancer Endoscopic submucosal dissection 

Notes

Funding

This study was partly supported by a Grant-in-Aid for Scientific Research (C) from the Ministry of Education, Culture, Sports, Science and Technology in Japan in 2015–2017 (Grant No. 15K09061).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

Ethical standards

All institutional and national guidelines for the care and use of laboratory animals were followed.

Human/animal rights

The study was approved by the institutional review board of the Laboratory Animal Center at Keio University School of Medicine (IRB no.14067). This article does not contain any studies with human performed by any of the authors.

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Copyright information

© The International Gastric Cancer Association and The Japanese Gastric Cancer Association 2019

Authors and Affiliations

  • Kyoko Nohara
    • 1
    • 5
  • Osamu Goto
    • 2
    • 3
    Email author
  • Hiroya Takeuchi
    • 1
    • 4
  • Motoki Sasaki
    • 2
  • Tadateru Maehata
    • 2
  • Naohisa Yahagi
    • 2
  • Yuko Kitagawa
    • 1
  1. 1.Department of SurgeryKeio University School of MedicineTokyoJapan
  2. 2.Division of Research and Development for Minimally Invasive Treatment, Cancer CenterKeio University School of MedicineTokyoJapan
  3. 3.Department of GastroenterologyNippon Medical SchoolTokyoJapan
  4. 4.Second Department of SurgeryHamamatsu University School of MedicineShizuokaJapan
  5. 5.Department of SurgeryNational Center for Global Health and MedicineTokyoJapan

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