Kenichiro Okimoto¹, Daisuke Maruoka¹, Tomoaki Matsumura¹, Mamoru Tokunaga¹, Tatsuya Kaneko¹, Hirotaka Oura¹, Naoki Akizue¹, Yuki Ohta¹, Keiko Saito¹, Makoto Arai¹, Jun Kato¹, Naoya Kato¹

Scientific Reports volume 10, Article number: 20667 (2020)

The current study aimed to evaluate the efficacy of linked color imaging (LCI) in improving the visibility of superficial non-ampullary duodenal epithelial tumors (SNADETs). We prospectively evaluated 44 consecutive patients diagnosed with SNADETs. Three trainees and three experts assessed the visibility scores of white light imaging (WLI), LCI, and blue laser imaging-bright (BLI-b) for SNADETs, which ranged from 1 (not detectable without repeated cautious examination) to 4 (excellent visibility). In addition, the L* a* b* color values and color differences (ΔE) were evaluated using the CIELAB color space system. For SNADETs, the visibility scores of LCI (3.53 ± 0.59) were significantly higher than those of WLI and BLI-b (2.66 ± 0.79 and 3.41 ± 0.64, respectively). The color differences (ΔE) between SNADETs and the adjacent normal duodenal mucosa in LCI mode (19.09 ± 8.33) were significantly higher than those in WLI and BLI-b modes (8.67 ± 4.81 and 12.92 ± 7.95, respectively). In addition, the visibility score of SNADETs and the color differences in LCI mode were significantly higher than those in WLI and BLI-b modes regardless of the presence of milk white mucosa (MWM). LCI has potential benefits, and it is considered a promising clinical modality that can increase the visibility of SNADETs regardless of the presence of MWM.

1 Department of Gastroenterology, Graduate School of Medicine, Chiba University, Inohana 1‐8‐1, Chiba City 260‐8670, Japan

Kyoichi Adachi¹, Norihisa Ishimura², Kanako Kishi¹, Takumi Notsu¹, Tomoko Mishiro¹, Kazunari Sota¹, Shunji Ishihara²

Intern Med. 2020 Sep 30. doi: 10.2169/internalmedicine.5676-20. Online ahead of print.

Objective: This study was conducted to clarify the prevalence of short segment Barrett’s esophagus (SSBE) using endoscopic observations with linked color imaging (LCI). In addition, the relationship between the presence of Barrett’s epithelium (BE) and the status of H. pylori infection was investigated.

Methods: The study subjects were 3,353 individuals (2,186 men, 1,167 women; mean age 55.2±9.4 years old) whose status of H. pylori infection had been determined. An endoscopic observation using LCI was performed to examine the distal margin of palisade vessels and confirm the area of BE. The prevalence of BE ≥5 mm in length was investigated.

Results: BE was diagnosed in 1,884 (56.2%) subjects, with lengths of <10, 10-19, 20-29, and ≥30 mm found in 1,005, 851, 27, and 1, respectively. Its prevalence in H. pylori-negative, H. pylori-positive, and post-eradicated subjects was 41.7%, 64.4%, and 69.9%, respectively (p<0.001). The duration since successful eradication of H. pylori did not affect the prevalence of BE. The degree of gastric mucosal atrophy was higher in cases with BE (p<0.001), although negativity for H. pylori infection and mild gastric mucosal atrophy were significant factors for the development of longer BE.

Conclusion: A high prevalence of SSBE was noted when LCI was used to determine the area of BE, as the distal end of the palisade vessels was easily visualized. Negativity for H. pylori infection and mild gastric mucosal atrophy were not correlated with SSBE prevalence.

1 Health Center, Shimane Environment and Health Public Corporation, Japan
2 Second Department of Internal Medicine, Shimane University, Faculty of Medicine, Japan

Vincent Zimmer^1,2, Elke Eltze³

Dig Liver Dis. 2020 Oct 17;S1590-8658(20)30931-2. doi: 10.1016/j.dld.2020.10.002. Online ahead of print.

A 62-year-old female patient presented with lower abdominal pain in combination with a 2-kg weight loss and stool retention. Medical history was significant for ovarian cancer that was treated by curative-intent surgery and adjuvant chemotherapy two years before. Imaging studies were consistent with peritoneal carcinomatosis and suggested incipient large bowel obstruction, for which the patient underwent lower GI endoscopy. While a high-grade stricture at the rectosigmoidal junction due to external compression precluded scope advancement, apart from mild unspecific erythema multiple nodular aphthoid-like lesions were identified throughout the rectum (Fig. 1A). Further endoscopic assessment including magnification image-enhanced endoscopy was performed. On blue laser imaging (BLI) no pit pattern was discernible (Fig. 1B). Linked color imaging (LCI) in escalating magnification levels, however, clearly depicted an irregular vessel network within the lesion with avascular areas, marked caliber changes, curtailed interruptions, tortuosity up to irregular loop formation (Fig. 1C,D). Overall, these findings were highly suggestive of diffuse multi-nodular metastases as an exceedingly uncommon type of gastrointestinal metastatic spread in ovarian cancer [1]. This was confirmed by final pathology indicating mucosal infiltration by atypical solid, in part, papillary epithelial complexes (Fig. 2A,B) with CK-7 and WT-1 positivity (Fig. 2C,D) and lymphovascular invasion, consistent with recurrent high-grade serous ovarian cancer.

1 Department of Medicine, Marienhausklinik St. Josef Kohlhof, Neunkirchen, Germany
2 Department of Medicine II, Saarland University Medical Center, Saarland University, Homburg, Germany
3 Institute of Pathology Saarbrücken-Rastpfuhl, Saarbrücken, Germany

Mamoru Tokunaga¹, Tomoaki Matsumura¹, Kentaro Ishikawa¹, Tatsuya Kaneko¹, Hirotaka Oura¹, Tsubasa Ishikawa¹, Ariki Nagashima¹, Wataru Shiratori¹, Kenichiro Okimoto¹, Naoki Akizue¹, Daisuke Maruoka¹, Yuki Ohta¹, Keiko Saito¹, Tomoo Nakagawa¹, Tetsuhiro Chiba¹, Makoto Arai^1,2, Jun Kato¹, Naoya Kato¹

Gastroenterol Res Pract. 2020 Sep 29;2020:9604345. doi: 10.1155/2020/9604345. eCollection 2020.

Background: The present study aimed to evaluate the efficacy of linked color imaging (LCI) in diagnosing Barrett’s esophagus (BE) and esophageal adenocarcinoma (EAC).

Methods: A total of 112 and 12 consecutive patients with BE and EAC were analyzed. The visibility scores of BE and EAC ranging from 4 (excellent visibility) to 0 (not detectable) were evaluated by three trainees and three experts using white light imaging (WLI), LCI mode, and blue laser imaging bright (BLI-b) mode. In addition, L∗a∗b∗ color values and color differences (ΔE∗) were evaluated using the CIELAB color space system.

Results: The visibility score of the BE in LCI mode (2.94 ± 1.32) was significantly higher than those in WLI (2.46 ± 1.48) and BLI-b mode (2.35 ± 1.46) (p < 0.01). The color difference (ΔE∗) from the adjacent gastric mucosa in LCI mode (17.11 ± 8.53) was significantly higher than those in other modes (12.52 ± 9.37 in WLI and 11.96 ± 6.59 in BLI-b mode, p < 0.01). The visibility scores of EAC in LCI mode (2.56 ± 1.47) and BLI-b mode (2.51 ± 1.28) were significantly higher than that in WLI (1.64 ± 1.46) (p < 0.01). The color difference (ΔE∗) from the adjacent normal Barrett’s mucosa in LCI mode (19.96 ± 7.97) was significantly higher than that in WLI (12.95 ± 11.86) (p = 0.03).

Conclusion: The present findings suggest that LCI increases the visibility of BE and EAC and contributes to the improvement of the detection of these lesions.

1 Department of Gastroenterology, Graduate School of Medicine, Chiba University Chiba, Japan
2 Department of Medical Oncology, Chiba University Chiba, Japan