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Toyoshima O, Nishizawa T, Yoshida S, Watanabe H, Odawara N, Sakitani K, Arano T, Takiyama H, Kobayashi H, Kogure H, Fujishiro M. Brown slits for colorectal adenoma crypts on conventional magnifying endoscopy with narrow band imaging using the X1 system. World J Gastroenterol 2022; 28:2748-2757. [PMID: 35979159 PMCID: PMC9260865 DOI: 10.3748/wjg.v28.i24.2748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/14/2022] [Accepted: 05/14/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Accurate diagnosis of colorectal premalignant polyps, including adenomas, is vital in clinical practice.
AIM To investigate the diagnostic yields of novel findings of brown slits for adenomas.
METHODS Patients who underwent colonoscopy at the Toyoshima Endoscopy Clinic were enrolled. Polyps sized ≥ 5 mm suspected of adenomas or clinically significant serrated polyps were included in the study. We defined the surface structures of colorectal polyps, which were brown curves inside and along the tubular glands identified using a combination of a new X1 system (Olympus Corporation) and a conventional magnifying colonoscope with non-staining narrow band imaging (NBI), as brown slits. The brown slits corresponded to slit-like lumens on endocytoscopy and histological crypt openings of an adenoma. We evaluated the diagnostic performance of brown slits for adenoma.
RESULTS A total of 108 Lesions from 62 patients were eligible. The average age was 60.4 years and 41.9% were male. The mean polyp size was 7.45 ± 2.83 mm. Fifty-seven lesions were positive for brown slits. Histopathological diagnosis comprised 59 low-grade tubular adenomas, 16 sessile serrated lesions, and 33 hyperplastic polyps. Among 59 adenomas, 56 (94.9%) were positive for brown slits. Among 16 sessile serrated lesions, 0 (0%) was positive for brown slits. Among 33 hyperplastic polyps, 1 (3.0%) was positive for brown slits. The sensitivity, specificity, and accuracy of brown slits for adenoma were 94.9%, 98.0%, and 96.3%, respectively. The positive predictive value and negative predictive value of brown slits for adenoma were also excellent for 98.2%, and 94.1%, respectively.
CONCLUSION Brown slits on conventional magnifying endoscopy with non-staining NBI using the X1 system were useful for diagnosing colorectal adenoma. The new endoscopy system could be examined using new standards.
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Affiliation(s)
- Osamu Toyoshima
- Department of Gastroenterology, Toyoshima Endoscopy Clinic, Tokyo 157-0066, Japan
| | - Toshihiro Nishizawa
- Department of Gastroenterology, Toyoshima Endoscopy Clinic, Tokyo 157-0066, Japan
- Department of Gastroenterology and Hepatology, International University of Health and Welfare, Narita Hospital, Chiba 286-8520, Japan
| | - Shuntaro Yoshida
- Department of Gastroenterology, Toyoshima Endoscopy Clinic, Tokyo 157-0066, Japan
| | - Hidenobu Watanabe
- Department of Pathology, Pathology and Cytology Laboratory Japan, Tokyo 166-0003, Japan
| | - Nariaki Odawara
- Department of Gastroenterology, Toyoshima Endoscopy Clinic, Tokyo 157-0066, Japan
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | - Kosuke Sakitani
- Department of Gastroenterology, Toyoshima Endoscopy Clinic, Tokyo 157-0066, Japan
- Department of Gastroenterology, Sakitani Endoscopy Clinic, Chiba 275-0026, Japan
| | - Toru Arano
- Department of Gastroenterology, Toyoshima Endoscopy Clinic, Tokyo 157-0066, Japan
- Department of Gastroenterology, The Fraternity Memorial Hospital, Tokyo 130-8587, Japan
| | - Hirotoshi Takiyama
- Department of Surgical Oncology, The University of Tokyo, Tokyo 113-8655, Japan
| | - Hideyuki Kobayashi
- Department of Internal Medicine, Umegaoka Ekimae Clinic, Tokyo 154-0022, Japan
| | - Hirofumi Kogure
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | - Mitsuhiro Fujishiro
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
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Iwagami H, Uedo N, Yip HC, Shichijo S, Kanesaka T, Maekawa A, Yamamoto S, Higashino K, Takeuchi Y, Ishihara R, Nakatsuka SI. Ultra-magnifying narrow-band imaging for endoscopic diagnosis of gastric intestinal metaplasia: a pilot image analysis study. Endosc Int Open 2021; 9:E522-E529. [PMID: 33816772 PMCID: PMC7969138 DOI: 10.1055/a-1352-2500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 11/24/2020] [Indexed: 12/15/2022] Open
Abstract
Background and study aims Narrow-band imaging (NBI) with or without magnification has recently been used for diagnosis of gastric intestinal metaplasia (GIM). Endocytoscopy is a newly developed endoscopic technique that enables ultra-high (500 ×) magnification of the digestive tract mucosa. This study aimed to analyze the ultra-magnifying NBI characteristics of GIM. Patients and methods This was a retrospective observational study conducted in a cancer referral center. Patients who underwent ultra-magnifying NBI of the gastric mucosa using endocytoscopy were eligible. A soft black cap was used for non-contact observation. We compared the characteristic findings of GIM by ultra-magnifying NBI of metaplastic and non-metaplastic mucosae. A reference standard for GIM in this study was conventional magnifying NBI findings of GIM. Results We obtained 28 images of metaplastic mucosa and 32 of non-metaplastic mucosa from 38 patients. Ultra-magnifying NBI revealed the cobblestone-like cellular structure in the marginal crypt epithelium of metaplastic and non-metaplastic mucosa. Diagnostic values (sensitivity, specificity, accuracy and kappa value [95 % confidence interval]) for the heterogeneous cellular structure and rough contour of the marginal crypt epithelium were 82 % (68 %-96 %), 94 % (85 %-100 %), 88 % (80 %-96 %), and 0.70, and 86 % (73 %-99 %), 94 % (85 %-100 %), 90 % (82 %-98 %), and 0.71, respectively. Conclusions The characteristic ultrastructural features of GIM were identified by ultra-magnifying NBI, warranting validation of diagnostic value in a prospective study.
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Affiliation(s)
- Hiroyoshi Iwagami
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Noriya Uedo
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Hon-Chi Yip
- Division of Upper Gastro-intestinal and Metabolic Surgery, Department of Surgery, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China
| | - Satoki Shichijo
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Takashi Kanesaka
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Akira Maekawa
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Sachiko Yamamoto
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Koji Higashino
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Yoji Takeuchi
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Ryu Ishihara
- Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan
| | - Shin-ichi Nakatsuka
- Department of Diagnostic Pathology and Cytology, Osaka International Cancer Institute, Osaka, Japan
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Nakamura H, Kudo SE, Misawa M, Kataoka S, Wakamura K, Hayashi T, Kudo T, Mori Y, Takeda K, Ichimasa K, Miyachi H, Katagiri A, Ishida F, Inoue H. Evaluation of microvascular findings of deeply invasive colorectal cancer by endocytoscopy with narrow-band imaging. Endosc Int Open 2016; 4:E1280-E1285. [PMID: 27995189 PMCID: PMC5161126 DOI: 10.1055/s-0042-117629] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 09/13/2016] [Indexed: 12/19/2022] Open
Abstract
UNLABELLED Background and study aims: Magnifying narrow-band imaging (NBI) is useful for examination of colorectal lesions, and endocytoscopy (EC) allows diagnostic evaluation of structural atypia, nuclear atypia, and vascular structures of colorectal tumors. The aim of this study was to examine surface microvessels in deep invasive colorectal cancer using EC with a new NBI video processor system. Patients and methods: We retrospectively assessed 132 colorectal neoplastic lesions: 81 adenomas, 18 intramucosal cancers, 4 submucosal slightly invasive cancers, and 29 submucosal deep invasive cancers. Detailed vascular findings commonly seen in submucosal deep invasive carcinomas included > 2-fold vasodilatation seen in adenomas, abnormal tortuosity and branching, loss of the micro-network pattern, caliber change in > 2 places in a single blood vessel, and blood vessels not visible in a line because they appear like a string of beads (beaded sign). Results: Univariate analysis revealed 4 vascular findings that were strongly predictive of submucosal deep invasion: vasodilatation (odds ratio [OR] 9.31; 95 % confidence interval [CI] 3.57 - 24.30), loss of the micro-network pattern (OR 61.60; 95 % CI 17.87 - 212.29), caliber change (OR 35.7; 95 % CI 9.16 - 139.14), and the beaded sign (OR 45.90; 95 % CI 5.50 - 382.73). Conclusions: Detailed assessment of ultra-magnified microvessels could improve the diagnostic performance for submucosal deep invasive cancer. STUDY REGISTRATION UMIN-CTR000014033.
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Affiliation(s)
- Hiroki Nakamura
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan ,Corresponding author Hiroki Nakamura Showa-University Northern Yokohama Hospital – Digestive Disease Center35-1,Chigasaki-chu-o TsudukiYokohama Kanagawa 2240032Japan+081090803598530459497738
| | - Shin-ei Kudo
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Masashi Misawa
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Shinichi Kataoka
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Kunihiko Wakamura
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Takemasa Hayashi
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Toyoki Kudo
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Yuichi Mori
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Kenichi Takeda
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Katsuro Ichimasa
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Hideyuki Miyachi
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Atushi Katagiri
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Fumio Ishida
- Digestive Disease Center, Showa University, Northern Yokohama Hospital, Yokohama, Japan
| | - Haruhiro Inoue
- Digestive Disease Center, Showa University, Koto-Toyosu Hospital, Tokyo, Japan
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