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Yoshida N, Draganov PV, John S, Neumann H, Rani RA, Hsu WH, Fernandopulle N, Siah KTH, Morgenstern R, Tomita Y, Inoue K, Dohi O, Hirose R, Itoh Y, Murakami T, Inagaki Y, Inada Y, Arantes V. Comparison of LED and LASER Colonoscopy About Linked Color Imaging and Blue Laser/Light Imaging of Colorectal Tumors in a Multinational Study. Dig Dis Sci 2023; 68:3943-3952. [PMID: 37558800 DOI: 10.1007/s10620-023-08057-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 07/23/2023] [Indexed: 08/11/2023]
Abstract
INTRODUCTION In light-emitting diode (LED) and LASER colonoscopy, linked color imaging (LCI) and blue light/laser imaging (BLI) are used for lesion detection and characterization worldwide. We analyzed the difference of LCI and BLI images of colorectal lesions between LED and LASER in a multinational study. METHODS We prospectively observed lesions with white light imaging (WLI), LCI, and BLI using both LED and LASER colonoscopies from January 2020 to August 2021. Images were graded by 27 endoscopists from nine countries using the polyp visibility score: 4 (excellent), 3 (good), 2 (fair), and 1 (poor) and the comparison score (LED better/similar/LASER better) for WLI/LCI/BLI images of each lesion. RESULTS Finally, 32 lesions (polyp size: 20.0 ± 15.2 mm) including 9 serrated lesions, 13 adenomas, and 10 T1 cancers were evaluated. The polyp visibility scores of LCI/WLI for international and Japan-expert endoscopists were 3.17 ± 0.73/3.17 ± 0.79 (p = 0.92) and 3.34 ± 0.78/2.84 ± 1.22 (p < 0.01) for LED and 3.30 ± 0.71/3.12 ± 0.77 (p < 0.01) and 3.31 ± 0.82/2.78 ± 1.23 (p < 0.01) for LASER. Regarding the comparison of lesion visibility about between LED and LASER colonoscopy in international endoscopists, a significant difference was achieved not for WLI, but for LCI. The rates of LED better/similar/LASER better for brightness under WLI were 54.5%/31.6%/13.9% (International) and 75.0%/21.9%/3.1% (Japan expert). Those under LCI were 39.2%/35.4%/25.3% (International) and 31.3%/53.1%/15.6% (Japan expert). There were no significant differences in the diagnostic accuracy and the comparison score of BLI images between LED and LASER. CONCLUSIONS The differences of lesion visibility for WLI/LCI/BLI between LED and LASER in international endoscopists could be compared to those in Japanese endoscopists.
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Affiliation(s)
- Naohisa Yoshida
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-Cho, Kawaramachi-Hirokoji, Kamigyo-Ku, Kyoto, 602-8566, Japan.
| | - Peter V Draganov
- Endoscopy Department, University of Florida, Gainesville, FL, USA
| | - Sneha John
- Department of Gastroenterology, Gold Coast University, Gold Coast, Australia
| | - Helmut Neumann
- First Medical Department, Interdisciplinary Endoscopy, University Medical Center Mainz, Mainz, Germany
| | - Rafiz Abdul Rani
- Gastroenterology Unit, Faculty of Medicine, Universiti Teknologi MARA, Selangor, Malaysia
| | - Wen-Hsin Hsu
- Division of Gastroenterology, Department of Internal Medicine, Yuan's General Hospital, Kaohsiung, Taiwan
| | | | - Kewin Tien Ho Siah
- Division of Gastroenterology & Hepatology, University Medicine Cluster, National University Hospital, Singapore, Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Ricardo Morgenstern
- Division of Gastroenterology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Yuri Tomita
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-Cho, Kawaramachi-Hirokoji, Kamigyo-Ku, Kyoto, 602-8566, Japan
| | - Ken Inoue
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-Cho, Kawaramachi-Hirokoji, Kamigyo-Ku, Kyoto, 602-8566, Japan
| | - Osamu Dohi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-Cho, Kawaramachi-Hirokoji, Kamigyo-Ku, Kyoto, 602-8566, Japan
| | - Ryohei Hirose
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-Cho, Kawaramachi-Hirokoji, Kamigyo-Ku, Kyoto, 602-8566, Japan
| | - Yoshito Itoh
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-Cho, Kawaramachi-Hirokoji, Kamigyo-Ku, Kyoto, 602-8566, Japan
| | - Takaaki Murakami
- Department of Gastroenterology, Aiseikai Yamashina Hospital, Kyoto, Japan
| | | | - Yutaka Inada
- Department of Gastroenterology, Kyoto First Red Cross Hospital, Kyoto, Japan
| | - Vitor Arantes
- Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Nagai M, Suzuki S, Minato Y, Ishibashi F, Mochida K, Ohata K, Morishita T. Detecting colorectal lesions with image-enhanced endoscopy: an updated review from clinical trials. Clin Endosc 2023; 56:553-562. [PMID: 37491990 PMCID: PMC10565430 DOI: 10.5946/ce.2023.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/31/2023] [Accepted: 04/09/2023] [Indexed: 07/27/2023] Open
Abstract
Colonoscopy plays an important role in reducing the incidence and mortality of colorectal cancer by detecting adenomas and other precancerous lesions. Image-enhanced endoscopy (IEE) increases lesion visibility by enhancing the microstructure, blood vessels, and mucosal surface color, resulting in the detection of colorectal lesions. In recent years, various IEE techniques have been used in clinical practice, each with its unique characteristics. Numerous studies have reported the effectiveness of IEE in the detection of colorectal lesions. IEEs can be divided into two broad categories according to the nature of the image: images constructed using narrowband wavelength light, such as narrowband imaging and blue laser imaging/blue light imaging, or color images based on white light, such as linked color imaging, texture and color enhancement imaging, and i-scan. Conversely, artificial intelligence (AI) systems, such as computer-aided diagnosis systems, have recently been developed to assist endoscopists in detecting colorectal lesions during colonoscopy. To better understand the features of each IEE, this review presents the effectiveness of each type of IEE and their combination with AI for colorectal lesion detection by referencing the latest research data.
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Affiliation(s)
- Mizuki Nagai
- Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Chiba, Japan
| | - Sho Suzuki
- Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Chiba, Japan
| | - Yohei Minato
- Department of Gastrointestinal Endoscopy, NTT Medical Center Tokyo, Tokyo, Japan
| | - Fumiaki Ishibashi
- Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Chiba, Japan
| | - Kentaro Mochida
- Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Chiba, Japan
| | - Ken Ohata
- Department of Gastrointestinal Endoscopy, NTT Medical Center Tokyo, Tokyo, Japan
| | - Tetsuo Morishita
- Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Chiba, Japan
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Yoshida N, Hayashi Y, Kashida H, Tomita Y, Dohi O, Inoue K, Hirose R, Itoh Y, Okada M, Yoshimoto S, Fujinuma T, Sakamoto H, Sunada K, Komeda Y, Sekai I, Okai N, Yamamoto H. Images of laser and light-emitting diode colonoscopy for comparing large colorectal lesion visibility with linked color imaging and white-light imaging. Dig Endosc 2022; 34:1413-1421. [PMID: 35656632 DOI: 10.1111/den.14370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 05/31/2022] [Indexed: 02/08/2023]
Abstract
OBJECTIVES In light-emitting diode (LED) and laser colonoscopy, linked color imaging (LCI) superiority to white-light imaging (WLI) for polyp detection is shown separately. We analyzed the noninferiority of LCI between LED and laser colonoscopy and that of WLI (LECOL study). METHODS We prospectively collected nonpolypoid lesions with WLI and LCI using LED and laser colonoscopy from January 2021 to August 2021. All images were evaluated randomly by 12 endoscopists (six nonexperts and six experts in three institutions) using the polyp visibility score: 4, excellent; 3, good; 2, fair; and 1, poor. The comparison score (LED better/similar/laser better) for redness and brightness was evaluated for WLI and LCI pictures of each lesion. RESULTS Finally, 63 nonpolypoid lesions were evaluated, and the mean polyp size was 24.5 ± 13.4 mm. Histopathology revealed 13 serrated lesions and 50 adenomatous/cancerous lesions. The mean polyp visibility scores of LCI pictures were significantly higher than those of WLI in the LED (3.35 ± 0.85 vs. 3.08 ± 0.91, P < 0.001) and the laser (3.40 ± 1.71 vs. 3.05 ± 0.97, P < 0.001) group, and the noninferiority of LCI pictures between LED and laser was significant (P < 0.001). The comparison scores revealed that the evaluation of redness and brightness (LED better/similar/laser better) were 26.8%/40.1%/33.1% and 43.5%/43.5%/13.0% for LCI pictures (P < 0.001) and 20.6%/44.3%/35.1% and 60.3%/31.7%/8.0% for WLI pictures (P < 0.001), respectively. CONCLUSION The noninferiority of polyp visibility with WLI and LCI in LED and laser colonoscopy was shown. WLI and LCI of LED tended to be brighter and less reddish than those of laser.
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Affiliation(s)
- Naohisa Yoshida
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoshikazu Hayashi
- Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan
| | - Hiroshi Kashida
- Department of Gastroenterology and Hepatology, Faculty of Medicine, Kindai University, Osaka, Japan
| | - Yuri Tomita
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Osamu Dohi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ken Inoue
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ryohei Hirose
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoshito Itoh
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Masahiro Okada
- Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan
| | - Shiori Yoshimoto
- Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan
| | - Toshihiro Fujinuma
- Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan
| | - Hirotsugu Sakamoto
- Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan
| | - Keijiro Sunada
- Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan
| | - Yoriaki Komeda
- Department of Gastroenterology and Hepatology, Faculty of Medicine, Kindai University, Osaka, Japan
| | - Ikue Sekai
- Department of Gastroenterology and Hepatology, Faculty of Medicine, Kindai University, Osaka, Japan
| | - Natsuki Okai
- Department of Gastroenterology and Hepatology, Faculty of Medicine, Kindai University, Osaka, Japan
| | - Hironori Yamamoto
- Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan
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Sakae H, Kanzaki H, Satomi T, Okanoue S, Obayashi Y, Hamada K, Abe M, Kono Y, Miura K, Iwamuro M, Kawano S, Kawahara Y, Tanaka T, Yanai H, Okada H. Linked Color Imaging (LCI) Emphasizes the Color Changes in the Gastric Mucosa After Helicobacter pylori Eradication. Dig Dis Sci 2022; 67:2375-2384. [PMID: 33982218 DOI: 10.1007/s10620-021-07030-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 04/26/2021] [Indexed: 12/09/2022]
Abstract
BACKGROUND Diffuse redness is a characteristic endoscopic finding that indicates current infection of Helicobacter pylori, which is reduced after successful eradication. Linked color imaging (LCI) has been reported to improve the visibility of diffuse redness compared to white light imaging (WLI); however, quantitative evaluation has not been reported. AIMS This study aimed to objectively evaluate the color change of the gastric mucosa after H. pylori eradication. METHODS Images of the greater curvature of the antrum and corpus were captured, and the sites were biopsied during esophagogastroduodenoscopy (EGD) before and 1 year after eradication. The region of interest (ROI) was set around the biopsied area on the images. The color difference (ΔE) before and after eradication was calculated using the CIE L*a*b* color space. The association between the histological evaluation and the color value of the corresponding ROI was determined. RESULTS At the antrum, there was no significant color change with either mode. At the corpus, the a* value, which reflected redness, decreased significantly after eradication with both modes (WLI: 41.2 to 36.0, LCI: 37.5 to 25.5); the b* value, reflecting yellowish, decreased with WLI, but increased significantly with LCI (WLI: 44.6 to 41.6, LCI: 23.9 to 29.2). The ΔE was significantly larger with LCI than with WLI (16.5 vs. 8.6). The a* values at the corpus were generally associated with histological neutrophil infiltration. CONCLUSIONS Quantitative evaluation revealed that LCI emphasizes the change in color of the gastric mucosa due to the reduction in diffuse redness.
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Affiliation(s)
- Hiroyuki Sakae
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan.
| | - Hiromitsu Kanzaki
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Takuya Satomi
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Shotaro Okanoue
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Yuka Obayashi
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Kenta Hamada
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Makoto Abe
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Yoshiyasu Kono
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Ko Miura
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Masaya Iwamuro
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Seiji Kawano
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Yoshiro Kawahara
- Department of Practical Gastrointestinal Endoscopy, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Takehiro Tanaka
- Department of Pathology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Hiroyuki Yanai
- Department of Diagnostic Pathology, Okayama University Hospital, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Hiroyuki Okada
- Department of Gastroenterology and Hepatology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine, 2-5-1 Shikata-cho, Kita-Ku, Okayama, 700-8558, Japan
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Min M, Ning SB, Hu DM, Hayashi Y, Liu Y. Development and validation of the linked color imaging classification for endoscopic prediction of colorectal polyp histology. J Dig Dis 2022; 23:310-317. [PMID: 35778752 DOI: 10.1111/1751-2980.13109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Linked color imaging (LCI) is a recently developed technique that emphasizes differences in mucosal color. In this study we aimed to develop a LCI classification based on the Narrow-band Imaging International Colorectal Endoscopic Classification for predicting colorectal polyp histology and evaluate the validity and performance of the endoscopists in differentiating hyperplastic polyps from adenomas using the LCI classification. METHODS A workshop involving six international experts from China and Japan with substantial experience with LCI developed the classification. Three experienced and seven less-experienced endoscopists used the LCI images to predict the histology of polyps independently, recording their degrees of confidence in these predictions before and after completing the training test for the LCI classification. RESULTS Of the 50 polyps included, 30 (60.0%) were adenomas. Overall diagnostic accuracy before training was 75.4% (95% confidence interval [CI] 71.4%-79.1%), which increased to 85.2% (95% CI 81.8%-88.2%) after training. After training, the experienced and less-experienced endoscopists achieved an overall accuracy of 87.3% and 84.3% for the prediction of polyp histology. Polyp prediction using the color criterion alone had the highest specificity and positive predictive value, whereas the vessel criterion achieved the highest accuracy and negative predictive value among all three individual LCI criteria. After training, both the experienced and less-experienced endoscopists had high degrees of interobserver agreement. CONCLUSIONS We developed and validated the first LCI classification for endoscopic differentiation of adenomas and hyperplastic polyps. The LCI classification significantly improved the diagnostic accuracy of colorectal polyps.
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Affiliation(s)
- Min Min
- Department of Gastroenterology and Hepatology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Shou Bin Ning
- Department of Gastroenterology and Hepatology, The Air Force Medical Center of PLA, Beijing, China
| | - Duan Min Hu
- Department of Gastroenterology and Hepatology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Yoshikazu Hayashi
- Division of Gastroenterology, Department of Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Yan Liu
- Department of Gastroenterology and Hepatology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
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Toyosawa J, Yamasaki Y, Fujimoto T, Tanaka S, Tanaka T, Mitsuhashi T, Okada H. Resection depth for small colorectal polyps comparing cold snare polypectomy, hot snare polypectomy and underwater endoscopic mucosal resection. Endosc Int Open 2022; 10:E602-E608. [PMID: 35571476 PMCID: PMC9106413 DOI: 10.1055/a-1785-8616] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 11/26/2021] [Indexed: 12/24/2022] Open
Abstract
Background and study aims Small colorectal polyps are removed by various methods, including cold snare polypectomy (CSP), hot snare polypectomy (HSP), and underwater endoscopic mucosal resection (UEMR), but the indications for using these methods are unclear. We retrospectively assessed the efficacy of CSP, HSP, and UEMR for small polyps, focusing on the depth of the resected specimens. Patients and methods Outpatients with non-pedunculated small polyps (endoscopically diagnosed as 6 to 9 mm), resected by two endoscopists between July 2019 and September 2020, were enrolled. We histologically evaluated the specimens resected via CSP, HSP, and UEMR. The main outcome was the containment rate of the muscularis mucosa (MM) and submucosa (SM) tissues. Results Forty polyps resected via CSP (n = 14), HSP (n = 12), or UEMR (n = 14) were enrolled after excluding 13 polyps with resection depths that were difficult to determine. The rates of specimens containing MM and SM tissue differed significantly (57 % and 29 % for CSP, 92 % and 83 % for HSP, and 100 % and 100 % for UEMR, respectively ( P = 0.005 for MM and P < 0.001 for SM tissue). Multiple logistic regression analysis showed UEMR was an independent factor relating to the containment of SM tissue. The thickness of SM tissue by CSP, HSP, and UEMR were 52 μm, 623 μm, and 1119 μm, respectively ( P < 0.001). The thickness by CSP was significantly less than those by HSP and UEMR ( P < 0.001, Bonferroni correction). Conclusions UEMR could be the best method to contain SM tissue without injection. Further studies are needed to evaluate the indication of UEMR for small polyps.
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Affiliation(s)
- Junki Toyosawa
- Department of Gastroenterology, Iwakuni Clinical Center, Yamaguchi, Japan
- Department of Gastroenterology, Okayama University Hospital, Okayama, Japan
| | - Yasushi Yamasaki
- Department of Gastroenterology, Iwakuni Clinical Center, Yamaguchi, Japan
- Department of Gastroenterology, Okayama University Hospital, Okayama, Japan
| | - Tsuyoshi Fujimoto
- Department of Gastroenterology, Iwakuni Clinical Center, Yamaguchi, Japan
| | - Shouichi Tanaka
- Department of Gastroenterology, Iwakuni Clinical Center, Yamaguchi, Japan
| | - Takehiro Tanaka
- Department of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Toshiharu Mitsuhashi
- Center for Innovative Clinical Medicine, Okayama University Hospital, Okayama, Japan
| | - Hiroyuki Okada
- Department of Gastroenterology, Okayama University Hospital, Okayama, Japan
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Yoshioka M, Sakaguchi Y, Utsunomiya D, Sonoda S, Tatsuta T, Ozawa S, Teramura Y, Harada K, Kinugasa H, Okada H. Virtual scale function of gastrointestinal endoscopy for accurate polyp size estimation in real-time: a preliminary study. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-210162R. [PMID: 34472242 PMCID: PMC8408764 DOI: 10.1117/1.jbo.26.9.096002] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/17/2021] [Indexed: 05/17/2023]
Abstract
SIGNIFICANCE Polyp size is important for selecting the surveillance interval or treatment policy. Nevertheless, it is challenging to accurately estimate the polyp size during endoscopy. An easy and cost-effective function to assist in polyp size estimation is required. AIM To propose a virtual scale function for endoscopy and evaluate its performance and expected accuracy. APPROACH An adaptive virtual scale behavior was demonstrated. The measurement error of the virtual scale along the distance between the tip of the endoscope and the object plane was evaluated using graph paper. The accuracy of polyp size estimation by an expert endoscopist was compared with the accuracy of the biopsy forceps method using phantom images. RESULTS The measurement errors of the virtual scale were ≤ 0.7 mm when the distance to the graph paper, which faced the tip of the endoscope, varied from 4 to 30 mm. The accuracy with the virtual scale was significantly higher than that obtained with biopsy forceps (5.3 ± 5.5 % versus 11.9 ± 9.4 % , P < 0.001). CONCLUSIONS The virtual scale function, which operates in real-time without any additional device, can be used to estimate polyp sizes easily and accurately with endoscopy.
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Affiliation(s)
| | | | | | | | | | | | - Yuichi Teramura
- FUJIFILM Corporation, Tokyo, Japan
- Address all correspondence to Yuichi Teramura,
| | - Keita Harada
- Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Gastroenterology and Hepatology, Okayama, Japan
| | - Hideaki Kinugasa
- Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Gastroenterology and Hepatology, Okayama, Japan
| | - Hiroyuki Okada
- Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Gastroenterology and Hepatology, Okayama, Japan
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Perrod G, Rahmi G, Cellier C. Colorectal cancer screening in Lynch syndrome: Indication, techniques and future perspectives. Dig Endosc 2021; 33:520-528. [PMID: 32314431 DOI: 10.1111/den.13702] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/04/2020] [Accepted: 04/14/2020] [Indexed: 12/15/2022]
Abstract
Lynch syndrome (LS) is an inherited predisposition to colorectal cancer (CRC), responsible for 3-5% of all CRC. This syndrome is characterized by the early occurrence of colorectal neoplastic lesions, with variable incidences depending on the type of pathogenic variants in MMR genes (MLH1, MSH2, MSH6, PMS2 and EPCAM) and demographics factors such as gender, body mass index, tobacco use and physical activity. Similar to sporadic cancers, colorectal screening by colonoscopy is efficient because it is associated with a reduction >50% of both CRC incidence and CRC related mortality. To that end, most guidelines recommend high definition screening colonoscopies in dedicated centers, starting at the age of 20-25 years old, with a surveillance interval of 1-2 years. In this review, we discuss the importance of high definition colonoscopies, including the compliance to specific key performance indicators, as well as the expected benefits of specific imaging modalities including virtual chromoendoscopy and dye-spray chromoendoscopy.
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Affiliation(s)
- Guillaume Perrod
- Hepato-gastroenterolgy and Digestive Endoscopy Department, Georges Pompidou European Hospital, APHP. Centre-Université de Paris, Paris, France.,PRED-IdF Network, Georges Pompidou European Hospital, Paris, France
| | - Gabriel Rahmi
- Hepato-gastroenterolgy and Digestive Endoscopy Department, Georges Pompidou European Hospital, APHP. Centre-Université de Paris, Paris, France.,PRED-IdF Network, Georges Pompidou European Hospital, Paris, France
| | - Christophe Cellier
- Hepato-gastroenterolgy and Digestive Endoscopy Department, Georges Pompidou European Hospital, APHP. Centre-Université de Paris, Paris, France.,PRED-IdF Network, Georges Pompidou European Hospital, Paris, France
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