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Gu F, Jiang W, Zhu J, Ma L, He B, Zhai H. Risk factors for unsuccessful colorectal endoscopic submucosal dissection: A systematic review and meta-analysis. Dig Liver Dis 2024; 56:1288-1297. [PMID: 38071178 DOI: 10.1016/j.dld.2023.11.030] [Citation(s) in RCA: 1] [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: 08/23/2023] [Revised: 11/05/2023] [Accepted: 11/21/2023] [Indexed: 07/29/2024]
Abstract
BACKGROUND AND AIMS Despite its growing popularity, endoscopic submucosal dissection (ESD) for colorectal neoplasms is still technically challenging. The factors contributing to the failure of ESD are not yet comprehensively elucidated. Therefore, this systematic review was conducted to explore the potential risk factors associated with unsuccessful colorectal ESD. METHODS A comprehensive search of Medline and Embase databases was conducted to identify relevant publications from inception until March 14, 2023. Unsuccessful ESD was defined as cases involving incomplete resection or the occurrence of adverse events, such as perforation and delayed bleeding. RESULTS Among the 2067 citations initially identified, a total of 23 cohort studies and 16 case-control studies met the inclusion criteria. Following meta-analyses, several significant risk factors for incomplete resection were identified, including lesion diameter ≥40 or 50 mm, right-side colonic location, deeper submucosal invasion, and severe fibrosis. Similarly, lesion diameter ≥40 or 50 mm and severe fibrosis emerged as risk factors for perforation. However, no individual factor was found to be statistically associated with delayed bleeding. CONCLUSIONS This meta-analysis identified risk factors correlated with incomplete resection and adverse events following ESD. The findings provide valuable insights that can guide clinical decision-making, aiding gastroenterologists in accurately identifying high-risk individuals.
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Affiliation(s)
- Feng Gu
- Department of Gastroenterology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Wei Jiang
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Beijing Key Laboratory for Precancerous Lesion of Digestive Diseases, Beijing 100050, China; National Clinical Research Center for Digestive Diseases, Beijing 100050, China
| | - Jingyi Zhu
- Department of Gastroenterology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Lei Ma
- Department of Gastroenterology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Boyuan He
- Department of Gastroenterology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Huihong Zhai
- Department of Gastroenterology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China.
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Jawaid S, Aboelezz AF, Daba G, Khalaf M, Ayoub F, Zabad N, Mercado M, Keihanian T, Othman M. Prospective feasibility study of a novel rigidizing stabilizing overtube in the resection of complex gastrointestinal polyps. Endoscopy 2024. [PMID: 38991535 DOI: 10.1055/a-2350-4059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
BACKGROUND A novel rigidizing overtube (ROT) was developed to facilitate endoscopic removal of complex gastrointestinal polyps. We aimed to prospectively evaluate the efficacy and safety of the device in the management of large gastrointestinal polyps. METHODS A prospective, single-center study, conducted between May 2021 and April 2023, enrolled patients undergoing endoscopic resection of colon/duodenal polyps ≥25 mm. Primary outcomes were safety, technical success, and clinical success defined as the ability of ROT to facilitate endoscopic polyp removal without changing the initial resection method. RESULTS 97 patients (98 polyps), with a mean polyp size of 33.2 mm (median 31.1), were evaluated. Technical and clinical success rates were 100% and 84%, respectively. Ileocecal valve location was the only predictor of clinical failure (P = 0.02). The mean time to reach the lesion was 7.2 minutes (95%CI 5-8), with overall resection and procedure times of 53.6 minutes (95%CI 48-61) and 88.9 minutes (95%CI 79-95), respectively. No device-related adverse events occurred. Lower technical (67%) and clinical (67%) success rates were seen for duodenal polyps (n = 6). CONCLUSION The novel ROT was safe, with high technical and clinical success during resection of complex colon polyps. Future studies will determine timing of implementation during routine endoscopic resection.
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Affiliation(s)
- Salmaan Jawaid
- Division of Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, United States
| | - Ahmed F Aboelezz
- Department of Internal Medicine, Gastroenterology and Hepatology Unit, Tanta University, Tanta, Egypt
| | - Gehad Daba
- Division of Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, United States
| | - Mai Khalaf
- Division of Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, United States
| | - Fares Ayoub
- Division of Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, United States
| | - Noor Zabad
- Division of Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, United States
| | - Michael Mercado
- Division of Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, United States
| | - Tara Keihanian
- Division of Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, United States
| | - Mohamed Othman
- Division of Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine, Houston, United States
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Zhang YX, Liu X, Gu F, Ding SG. Planned Hybrid Endoscopic Submucosal Dissection as Alternative for Colorectal Neoplasms: A Propensity Score-Matched Study. Dig Dis Sci 2024; 69:949-960. [PMID: 38218733 DOI: 10.1007/s10620-023-08195-7] [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: 09/19/2023] [Accepted: 11/09/2023] [Indexed: 01/15/2024]
Abstract
BACKGROUND AND AIMS Hybrid endoscopic submucosal dissection (H-ESD), a modified ESD with a snare, has become increasingly utilized to overcome the limitations of conventional ESD (C-ESD). This study aimed to compare the efficacy and safety of Planned H-ESD and C-ESD for colorectal lesions. METHODS Propensity score matching was performed to control for confounding variables in this retrospective study. Outcomes included en bloc resection and complete resection (R0) rates, procedure time, adverse event rates, and local recurrence rate. RESULTS 1286 lesions were enrolled in the study. After matching, 263 lesions were assigned to each group. The Planned H-ESD group has lower en bloc rate but similar R0 resection rate compared to the C-ESD group (90.9% vs 98.1%, P = 0.001; 77.2% vs 77.9%, P = 0.917). The median procedure time was shorter in the Planned H-ESD group (27.0 min vs 35.0 min, P = 0.001). There were no significant differences in adverse events rates or local recurrence rate. Subgroup analysis based on lesion size revealed that a significantly lower en bloc resection rate in the Planned H-ESD group compared to the C-ESD group for lesions ≥ 40 mm (71.0% vs 94.3%, P = 0.027), but there was no significant difference for lesions < 40 mm. CONCLUSION The Planned H-ESD has a lower en bloc resection rate but a similar R0 resection rate, adverse event rates, local recurrence rate, and shorter procedure duration. Compared to C-ESD, Planned H-ESD presents advantages for managing colorectal neoplasms below 40 mm.
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Affiliation(s)
- Yu-Xin Zhang
- Department of Gastroenterology, Peking University Third Hospital, Beijing, 100191, China
- Beijing Key Laboratory for Helicobacter Pylori Infection and Upper Gastrointestinal Diseases, Beijing, 100191, China
| | - Xun Liu
- Department of Gastroenterology, Peking University Third Hospital, Beijing, 100191, China
- Beijing Key Laboratory for Helicobacter Pylori Infection and Upper Gastrointestinal Diseases, Beijing, 100191, China
| | - Fang Gu
- Department of Gastroenterology, Peking University Third Hospital, Beijing, 100191, China
- Beijing Key Laboratory for Helicobacter Pylori Infection and Upper Gastrointestinal Diseases, Beijing, 100191, China
| | - Shi-Gang Ding
- Department of Gastroenterology, Peking University Third Hospital, Beijing, 100191, China.
- Beijing Key Laboratory for Helicobacter Pylori Infection and Upper Gastrointestinal Diseases, Beijing, 100191, China.
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Morimoto S, Tanaka H, Takehara Y, Yamamoto N, Tanino F, Kamigaichi Y, Yamashita K, Takigawa H, Yuge R, Urabe Y, Oka S. Hybrid endoscopic submucosal dissection as a salvage option for difficult colorectal conventional endoscopic submucosal dissection. Surg Endosc 2024; 38:222-228. [PMID: 37968384 DOI: 10.1007/s00464-023-10544-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 10/13/2023] [Indexed: 11/17/2023]
Abstract
BACKGROUND When total submucosal dissection is difficult to achieve during conventional colorectal endoscopic submucosal dissection (C-ESD), the lesion can be resected by final snaring through salvage hybrid ESD (SH-ESD). This study aimed to examine the outcomes of SH-ESD and identify its indications that could achieve en bloc resection. METHODS We recruited 1039 consecutive patients with colorectal lesions that underwent ESD at Hiroshima University Hospital between January 2015 and December 2020. C-ESD was attempted thoroughly in 924 lesions (C-ESD group, including 9 lesions in which ESD was discontinued), and SH-ESD was performed owing to some difficulties in 115 lesions (SH-ESD group). Risk factors for incomplete resection by SH-ESD and ESD discontinuation were evaluated using multivariate analysis. The outcomes were compared between cases with remaining undissected submucosa of < 20 mm in diameter in the SH-ESD and C-ESD groups, using propensity score matching. RESULTS Multivariate analysis revealed that a procedure time > 80 min and remaining undissected submucosa ≥ 20 mm in diameter were significant risk factors for incomplete resection after SH-ESD and ESD discontinuation. By propensity score matching analysis, procedure time was significantly shorter in the SH-ESD group with remaining undissected submucosa < 20 mm in diameter than in the C-ESD group (71 min vs. 90 min, p = 0.0053), although no significant difference was found in the en bloc resection rate (94% vs. 87%, p = 0.0914). CONCLUSION SH-ESD can be an alternative surgical method when conventional ESD is difficult to continue in cases in which the remaining undissected submucosa is < 20 mm in diameter.
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Affiliation(s)
- Shin Morimoto
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Hidenori Tanaka
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan.
| | - Yudai Takehara
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Noriko Yamamoto
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Fumiaki Tanino
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Yuki Kamigaichi
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Ken Yamashita
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Hidehiko Takigawa
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Ryo Yuge
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Yuji Urabe
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
| | - Shiro Oka
- Department of Gastroenterology, Hiroshima University Hospital, 1-2-3, Kasumi, Minamiku, Hiroshima, 734-8551, Japan
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Chow CWS, Fung TLD, Chan PT, Kwok KH. Endoscopic submucosal dissection for colorectal polyps: outcome determining factors. Surg Endosc 2023; 37:1293-1302. [PMID: 36192659 PMCID: PMC9529320 DOI: 10.1007/s00464-022-09672-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 09/24/2022] [Indexed: 11/24/2022]
Abstract
BACKGROUND Endoscopic submucosal dissection (ESD) has gained increasing popularity in the management of complicated colorectal polyps. However, clinical outcomes for ESD have remained highly inconsistent worldwide. This study investigated and analysed factors that significantly affect ESD outcomes. METHODS We conducted a single-centred retrospective study on 220 colorectal polyps removed by ESD from 1st January 2016 to 31st December 2020. Data were collected and retrieved from clinical records. Variables studied included patient demographics, ESD technicalities and polyp characteristics. The primary outcome was completeness of resection based on en bloc and R0 resection rates. The secondary outcomes were recurrence, complications and hospital stay. Further analysis was performed for significant outcome determining factors. RESULTS The en bloc resection and R0 resection rates were 97.3% and 65% respectively. Intraprocedural and delayed perforation rates were 3.2% and 0.5% respectively. Intraprocedural and delayed bleeding rates were both 1.8%. Post-polypectomy syndrome rate was 2.7%. The median hospital stay was 4 days. Submucosal fibrosis was a significant determining factor for lower en bloc resection (p = 0.004), lower R0 resection (p = 0.002), intraprocedural perforation (p = 0.001), intraprocedural bleeding (p = 0.025) and post-polypectomy syndrome (p = 0.039). Hybrid snaring was associated with lower en bloc resection (p < 0.001), while longer ESD time was associated with lower R0 resection (p = 0.003) and post-polypectomy syndrome (p = 0.025). Other significant factors for post-polypectomy syndrome included young age (p = 0.021) and large polyp size (p = 0.018). Secondary analysis showed that submucosal fibrosis was significantly associated with non-granular lesions (p < 0.001) and prior biopsy (p = 0.003). CONCLUSION Submucosal fibrosis, hybrid snaring, ESD time, age and polyp size were significant outcome determining factors for ESD. By identifying these factors, strategies may be formulated to improve ESD outcomes.
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Affiliation(s)
- Chi Woo Samuel Chow
- Department of Surgery, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, Hong Kong, China.
| | - Tak Lit Derek Fung
- Department of Surgery, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, Hong Kong, China
| | - Pak Tat Chan
- Department of Surgery, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, Hong Kong, China
| | - Kam Hung Kwok
- Department of Surgery, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, Hong Kong, China
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Guan H, Zeng C, Chen Y. Letter to editor: piecemeal cold snare polypectomy versus conventional endoscopic mucosal resection for large sessile serrated lesions. Gut 2022; 71:440. [PMID: 33827782 PMCID: PMC8762034 DOI: 10.1136/gutjnl-2021-324531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/04/2021] [Accepted: 03/09/2021] [Indexed: 12/08/2022]
Affiliation(s)
- Haiying Guan
- Department of Gastroenterology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Chunyan Zeng
- Department of Gastroenterology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Youxiang Chen
- Department of Gastroenterology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
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Achkasov SI, Shelygin YA, Likutov AA, Mtvralashvili DA, Veselov VV, Mainovskaya OA, Nagudov MA, Chernyshov SV. [One thousand endoscopic submucosal dissections. Experience of the national center]. Khirurgiia (Mosk) 2022:5-11. [PMID: 35920217 DOI: 10.17116/hirurgia20220815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
BACKGROUND Endoscopic submucosal dissection (ESD) is a perspective method of organ-sparing treatment of benign colon tumors. MATERIAL AND METHODS The study included 1.000 patients with colon neoplasms who underwent ESD between October 2016 and October 2021. All surgeries were performed under intravenous sedation. RESULTS Mean dimension of tumors was 3.4 cm, median of surgery time - 51 (31; 101) minutes. Conversion of endoscopic approach occurred in 7.6% of cases. The main cause of conversion was unsatisfactory lifting in submucosal injection process. Incidence of en bloc and R0 resections was 84.1% and 68.3%, respectively. Postoperative morbidity was 2.9% that correlates with the world literature data. CONCLUSION Endoscopic submucosal dissection is an effective and safe method for benign colon neoplasms. Considering high incidence of en bloc resection and low rate of local recurrence in benign neoplasms, further research of efficacy and safety of ESD in early colon cancer is needed.
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Affiliation(s)
- S I Achkasov
- Ryzhikh National Medical Research Center, Moscow, Russia
| | - Yu A Shelygin
- Ryzhikh National Medical Research Center, Moscow, Russia
| | - A A Likutov
- Ryzhikh National Medical Research Center, Moscow, Russia
| | | | - V V Veselov
- Ryzhikh National Medical Research Center, Moscow, Russia
| | | | - M A Nagudov
- Ryzhikh National Medical Research Center, Moscow, Russia
| | - S V Chernyshov
- Ryzhikh National Medical Research Center, Moscow, Russia
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A Surveillance Endoscopy Strategy Based on Local Recurrence Rates after Colorectal Endoscopic Submucosal Dissection. J Clin Med 2021; 10:jcm10194591. [PMID: 34640609 PMCID: PMC8509179 DOI: 10.3390/jcm10194591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 09/27/2021] [Accepted: 10/01/2021] [Indexed: 11/17/2022] Open
Abstract
Backgrounds: It is not clear when and how frequently surveillance endoscopy should be performed after colorectal endoscopic submucosal dissection (ESD). We aimed to suggest a surveillance endoscopy strategy by investigating the cumulative local recurrence rates and identifying risk factors for local recurrence after colorectal ESD. Methods: We reviewed the medical records of 770 patients who underwent colorectal ESD for 778 lesions at our institution from 2005 to 2016. We investigated the cumulative local recurrence rates and risk factors for local recurrence. Results: Local recurrence developed in 12 (1.5%) of 778 lesions during the follow-up period of 37.4 ± 31.7 months. The one-, three-, and five-year cumulative local recurrence rates were 0.4%, 1.7%, and 2.2%, respectively. The risk factors for local recurrence were piecemeal resection (odds ratio (OR) 3.948, 95% confidence interval (CI) 1.164–13.385; p = 0.028) and histological incomplete resection (OR 8.713, 95% CI 2.588–29.334; p < 0.001). Local recurrence tended to develop frequently after ESD of early cancers. Conclusions: Short-term surveillance endoscopy should be recommended after piecemeal ESD, histological incomplete resection, and ESD of early colorectal cancers. Surveillance endoscopy with longer intervals can be suggested after en bloc ESD with the histological complete resection of benign colorectal tumors.
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Park YR. Correction: Development of a Real-Time Risk Prediction Model for In-Hospital Cardiac Arrest in Critically Ill Patients Using Deep Learning: Retrospective Study (Preprint). JMIR Med Inform 2020. [DOI: 10.2196/20499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Chiba H, Tachikawa J, Arimoto J, Ashikari K, Kuwabara H, Nakaoka M, Goto T, Ohata K, Nakajima A. Predictive Factors of Mild and Severe Fibrosis in Colorectal Endoscopic Submucosal Dissection. Dig Dis Sci 2020; 65:232-242. [PMID: 31312991 DOI: 10.1007/s10620-019-05735-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 07/11/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND STUDY AIMS Varying degrees of fibrosis in colorectal endoscopic submucosal dissection (ESD) make the procedure difficult. Consensus on the predictive factors of fibrosis degree (mild or severe) has not been established. We conducted a study to identify the predictive factors and to examine the feasibility of ESD for fibrotic lesions. PATIENTS AND METHODS We included 518 patients who had undergone ESD for 558 lesions from April 2012-September 2018. Patients were classified into fibrosis or no-fibrosis groups, and logistic regression analysis was performed to identify predictive factors of fibrosis. Subgroup analyses were performed for fibrosis degree. RESULTS The total incidence of fibrosis was 21.1% (mild: 14.1%; severe: 7.1%). Although the curative resection rate (free margin: invasion depth less than 1000 μm: no lymphatic invasion, vascular involvement) was lower in the fibrosis group compared with the control (80.7% vs. 97.6%), neither the en bloc resection rate (99.1% vs. 100%) nor incidence of perforation (0.9% vs. 0.2%) differed between the two groups. Multivariate analysis revealed that a cecal location, preoperative biopsy, straddling fold, laterally spreading tumor-non-granular-pseudo-depressed (LST-NG-PD) type were predictive of mild fibrosis. The presence of a straddling fold and a protruded lesion were independent predictive factors of severe fibrosis. CONCLUSIONS We identified the predictive factors of mild and severe fibrosis. It is preferable that a more experienced physician performs ESD for the lesions with F2 fibrosis.
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Affiliation(s)
- Hideyuki Chiba
- Department of Gastroenterology, Omori Red Cross Hospital, 4-30-1, Chuo, Ota-Ku, Tokyo, 143-8527, Japan.
| | - Jun Tachikawa
- Department of Gastroenterology, Omori Red Cross Hospital, 4-30-1, Chuo, Ota-Ku, Tokyo, 143-8527, Japan
| | - Jun Arimoto
- Department of Gastroenterology, Omori Red Cross Hospital, 4-30-1, Chuo, Ota-Ku, Tokyo, 143-8527, Japan
| | - Keiichi Ashikari
- Department of Gastroenterology and Hepatology, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004, Japan
| | - Hiroki Kuwabara
- Department of Gastroenterology, Omori Red Cross Hospital, 4-30-1, Chuo, Ota-Ku, Tokyo, 143-8527, Japan
| | - Michiko Nakaoka
- Department of Gastroenterology, Omori Red Cross Hospital, 4-30-1, Chuo, Ota-Ku, Tokyo, 143-8527, Japan
| | - Toru Goto
- Department of Gastroenterology, Omori Red Cross Hospital, 4-30-1, Chuo, Ota-Ku, Tokyo, 143-8527, Japan
| | - Ken Ohata
- Department of Gastroenterology, NTT Medical Center Tokyo, 5-9-22 Higashi-Gotanda, Shinagawa-Ku, Tokyo, 141-8625, Japan
| | - Atsushi Nakajima
- Department of Gastroenterology and Hepatology, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004, Japan
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