Endoscopy International Open (Oct 2016)

Can magnifying endoscopy with narrow-band imaging discriminate between carcinomas and low grade adenomas in gastric superficial elevated lesions?

  • Takashi Nonaka,
  • Masahiko Inamori,
  • Yasushi Honda,
  • Kenji Kanoshima,
  • Yumi Inoh,
  • Mizue Matsuura,
  • Shiori Uchiyama,
  • Eiji Sakai,
  • Takuma Higurashi,
  • Hidenori Ohkubo,
  • Hiroshi Iida,
  • Hiroki Endo,
  • Koji Fujita,
  • Akihiko Kusakabe,
  • Kazuhiro Atsukawa,
  • Hisao Takahashi,
  • Yoko Tateishi,
  • Shin Maeda,
  • Kenichi Ohashi,
  • Atsushi Nakajima

DOI
https://doi.org/10.1055/s-0042-117632
Journal volume & issue
Vol. 04, no. 11
pp. E1203 – E1210

Abstract

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Background and study aims: The aim of this study was to investigate the capability of magnifying endoscopy with narrow-band imaging (ME-NBI) to discriminate between early carcinomas (EC) and low grade adenomas (LGA) in gastric superficial elevated epithelial neoplasias. Patients and methods: We investigated 100 consecutive cases of gastric superficial elevated epithelial neoplasias that were removed using endoscopic submucosal dissection. The pathological diagnostic criteria were based on the revised Vienna classification; category 4 (mucosal high grade neoplasia) and category 5 (submucosal invasion by carcinoma) lesions were diagnosed as EC, whereas category 3 (mucosal low grade neoplasia) lesions were diagnosed as LGA. The associations between the postoperative pathological diagnoses and the ME-NBI findings were analyzed, and included the shape, specification, and area of irregularity in the microvascular architecture (MV) and the microsurface structure (MS). Results: Seventy-nine EC and 21 LGA cases diagnosed postoperatively were evaluated retrospectively. The lesion size (median; range (mm)) was significantly larger in the EC group (14; 2 – 95) compared to the LGA group (5; 2 – 16) (P < 0.001). Wavy forms in the MV shapes (P = 0.031), extension in the MV specifications (P = 0.035), and area with MV irregularity (P = 0.001) were found to be statistically significant predictive findings for EC. Villous forms in the MS shapes (P = 0.026), enlargement in the MS specifications (P = 0.044), and area with MS irregularity (P = 0.021) were also found to be statistically significant predictive findings for EC. The rates of preoperative sensitivity, specificity, and diagnostic accuracy of ME-NBI for discriminating EC were 86.1 %, 38.9 %, and 75 %, respectively. Conclusions: The present study suggests that ME-NBI is useful for the differential diagnosis of EC and LGA in gastric superficial elevated epithelial neoplasias. Study registration: UMIN000012925.