International Journal of Colorectal Disease

, Volume 27, Issue 3, pp 325–330

Autofluorescence imaging and the quantitative intensity of fluorescence for evaluating the dysplastic grade of colonic neoplasms

  • Kentaro Moriichi
  • Mikihiro Fujiya
  • Ryu Sato
  • Toshie Nata
  • Yoshiki Nomura
  • Nobuhiro Ueno
  • Chisato Ishikawa
  • Yuhei Inaba
  • Takahiro Ito
  • Kotaro Okamoto
  • Hiroki Tanabe
  • Yusuke Mizukami
  • Jiro Watari
  • Yusuke Saitoh
  • Yutaka Kohgo
Original Article

DOI: 10.1007/s00384-011-1311-8

Cite this article as:
Moriichi, K., Fujiya, M., Sato, R. et al. Int J Colorectal Dis (2012) 27: 325. doi:10.1007/s00384-011-1311-8

Abstract

Background and aims

Autofluorescence imaging (AFI) is a novel technology which can capture fluorescence emitted from intestinal tissues. While AFI is useful for detecting colorectal neoplasms, it is unclear whether AFI can facilitate the diagnosis by differentiating the extent of dysplasia of colorectal neoplasms. This study investigated the efficacy of AFI in discriminating high-grade from low-grade adenoma.

Materials and methods

Sixty-seven patients who underwent colonoscopy with AFI were enrolled in this study. The AFI images obtained from 158 lesions in these patients were visually classified into four categories, namely, green (G), green with magenta spots (GM), magenta with green spots (MG), and magenta (M), according to their color intensities, immediately after the examination. The AFI images of the lesions were quantified using an image-analytical software program (F index). Either the F index or the visual assessment was prospectively compared with the dysplastic grade.

Results

The F index of the high-grade adenomas was significantly lower than that of the low-grade adenomas, hyperplasia, and normal mucosa (p < 0.05). The incidence of the lesions classified into the M classification for high-grade adenomas (55.6%) was significantly higher than that of either low-grade adenomas (20.8%) or hyperplasia (0%). No correlation was observed between the F index or the visual classification and the tumor shape. The F index was not influenced by the size of the lesion, while the size was significantly associated with the visual classification of AFI.

Conclusions

AFI, particularly the F index, is considered to be a useful procedure for estimating the dysplastic grade of colonic adenomas.

Keywords

Autofluorescence imagingCancerAdenomaDysplastic gradeF index

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Kentaro Moriichi
    • 1
  • Mikihiro Fujiya
    • 1
  • Ryu Sato
    • 2
  • Toshie Nata
    • 1
  • Yoshiki Nomura
    • 1
  • Nobuhiro Ueno
    • 1
  • Chisato Ishikawa
    • 1
  • Yuhei Inaba
    • 1
  • Takahiro Ito
    • 1
  • Kotaro Okamoto
    • 1
  • Hiroki Tanabe
    • 1
  • Yusuke Mizukami
    • 1
  • Jiro Watari
    • 3
  • Yusuke Saitoh
    • 4
  • Yutaka Kohgo
    • 1
  1. 1.Division of Gastroenterology and Hematology/Oncology, Department of MedicineAsahikawa Medical UniversityAsahikawaJapan
  2. 2.Engaru-Kosei General Hospital, Internal MedicineEngaruJapan
  3. 3.Division of Upper Gastroenterology, Department of Internal MedicineHyogo College of MedicineNishinomiyaJapan
  4. 4.Digestive Disease CenterAsahikawa City HospitalAsahikawaJapan