Intestinal Research

IBD

Are the risks of colorectal cancer and biliary cancer really increased if patients with ulcerative colitis have primary sclerosing cholangitis?: Jung Wook Lee, Won Moon; Intest Res 2023;21(2):171-173. Published online April 28, 2023; DOI: https://doi.org/10.5217/ir.2023.00049

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Endoscopy

Reviewing not Homer’s Iliad, but “Kai Bao Ben Cao”: indigo dye—the past, present, and future: Yusuke Yoshimatsu, Tomohisa Sujino, Takanori Kanai; Intest Res 2023;21(2):174-176. Published online June 14, 2022; DOI: https://doi.org/10.5217/ir.2022.00018

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IBD

First aid with color atlas for the use of intestinal ultrasound for inflammatory bowel disease in daily clinical practice: Jun Miyoshi, Hiromu Morikubo, Hiromi Yonezawa, Hideaki Mori, Tadakazu Hisamatsu; Intest Res 2023;21(2):177-188. Published online April 28, 2023; DOI: https://doi.org/10.5217/ir.2023.00003

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Intestinal ultrasound (IUS) is a promising modality for the management of inflammatory bowel disease (IBD) and has the potential to particularly contribute in monitoring disease activity, an advantage crucial for optimizing the therapeutic strategy. While many IBD physicians appreciate and are interested in the use of IUS for IBD, currently only a limited number of facilities can employ this examination in daily clinical practice. A lack of guidance is one of the major barriers to introducing this procedure. Standardized protocols and assessment criteria are needed such that IUS for IBD can be considered a feasible, reliable examination in clinical practice, and multicenter clinical studies can be conducted for further clinical evidence of the application of IUS in IBD for best patient care. In this article, we provide an overview of how to start IUS for IBD and introduce basic procedures. Furthermore, IUS images from our practice are provided as a color atlas for understanding sonographic findings and scoring systems. We anticipate this “first aid” article will be helpful to promote IUS for IBD in daily practice.

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A combination of bowel wall thickness and submucosa index is useful for estimating endoscopic improvement in ulcerative colitis: external validation of the Kyorin Ultrasound Criterion
Haruka Komatsu, Hiromu Morikubo, Yoko Kimura, Chihiro Moue, Hiromi Yonezawa, Minoru Matsuura, Jun Miyoshi, Tadakazu Hisamatsu
Journal of Gastroenterology.2024; 59(3): 209. CrossRef
Early Sonographic Improvement Predicts Clinical Remission and Mucosal Healing With Molecular-Targeted Drugs in Ulcerative Colitis
Yoko Kimura, Jun Miyoshi, Hiromu Morikubo, Haruka Komatsu, Chihiro Moue, Hiromi Yonezawa, Minoru Matsuura, Tadakazu Hisamatsu
Gastro Hep Advances.2024; 3(6): 703. CrossRef
IBD barriers across the continents – East Asia
Joyce Wing Yan Mak, Agnes Hiu Yan Ho, Siew Chien Ng
Therapeutic Advances in Gastroenterology.2023;[Epub] CrossRef

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Functional bowel disorder

An Asian perspective on irritable bowel syndrome: Kee Wook Jung, Seung-Jae Myung; Intest Res 2023;21(2):189-195. Published online May 31, 2022; DOI: https://doi.org/10.5217/ir.2021.00136

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Irritable bowel syndrome (IBS) is a prevalent chronic disorder, and its epidemiology depends on the diagnostic criteria used. Recently, the Rome IV criteria for IBS were published by changing the frequency of abdominal pain and excluding abdominal discomfort from the previously used Rome III criteria. However, the recent Asian consensus on IBS recommends the inclusion of abdominal discomfort and abdominal pain as diagnostic criteria. The low fermentable oligo-, di-, mono-saccharides, and polyols (FODMAP) diet has been proven to be effective in Western patients. Moreover, recent well-designed studies reported its effectiveness and the microbial changes after implementing it in Asian patients with IBS. However, traditional Korean foods including kimchi, one of representative FODMAP-rich food, exhibited a poor correlation with the food-related symptoms of IBS. Therefore, the low FODMAP diet protocol should be cautiously applied to IBS patients, especially to Korean patients with IBS. In Asian countries, there are lots of traditional herbal medicines and treatments for IBS; however, these studies have limitations including the heterogeneity of herbal mixtures and relatively small sample size. Therefore, well-designed studies based on large samples are required to validate complementary and alternative medicine in the treatment of Asian patients with IBS.

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The Role of Diet in the Management of Irritable Bowel Syndrome: A Comprehensive Review
Maleesha Jayasinghe , Vinuri Karunanayake, Ali Mohtashim, Dilushini Caldera , Piyalka Mendis , Omesh Prathiraja, Fatemeh Rashidi, John A Damianos
Cureus.2024;[Epub] CrossRef
Downregulated APOD and FCGR2A correlates with immune infiltration and lipid-induced symptoms of irritable bowel syndrome
Yamei Ran, Kangqi Wu, Chenglin Hu, Renzheng Liang, Li Zhang, Juan Xiao, Yongmei Peng, Wenjing Sun
Scientific Reports.2023;[Epub] CrossRef
Technical Feasibility of Quantitative Measurement of Various Degrees of Small Bowel Motility Using Cine Magnetic Resonance Imaging
Ji Young Choi, Jihye Yun, Subin Heo, Dong Wook Kim, Sang Hyun Choi, Jiyoung Yoon, Kyuwon Kim, Kee Wook Jung, Seung-Jae Myung
Korean Journal of Radiology.2023; 24(11): 1093. CrossRef
Letter to the Editor: Survey-Based Analysis of Clinical Treatment Status of Irritable Bowel Syndrome in Korea: Suggestions for Future Research
Ji Young Chang
Journal of Korean Medical Science.2023;[Epub] CrossRef
Effectiveness of Medilac-S as an Adjuvant to Conventional Irritable Bowel Syndrome Treatments: A Systematic Review with Meta-Analysis
Annie Tremblay, Xiaoyu Xu, James Colee, Thomas A. Tompkins, Sylvie Binda
Gastroenterology Insights.2023; 14(4): 491. CrossRef
Comments on Efficacy of a Synbiotic Containing Lactobacillus paracasei DKGF1 and Opuntia humifusa in Elderly Patients with Irritable Bowel Syndrome: A Randomized, Double-Blind, Placebo-Controlled Trial
Kwang Woo Kim
Gut and Liver.2023; 17(6): 954. CrossRef

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IBD

Proposal of novel staging system CNM (Crohn’s primary site, nodes, mesentery) to predict postoperative recurrence of Crohn’s disease: Guduru Venkat Rao, Partha Pal, Anuradha Sekaran, Pradeep Rebala, Manu Tandan, D. Nageshwar Reddy; Intest Res 2023;21(2):196-204. Published online August 8, 2022; DOI: https://doi.org/10.5217/ir.2022.00045

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After oncologic resection, histological grading and staging of the tumor give important prognostic information about the future risk of recurrence and hence influence the subsequent management plan. Several studies and their meta-analysis have shown that various histological features (e.g., microscopic positive resection margins, plexitis, granuloma, mesenteric inflammatory activity) can predict postoperative clinical/endoscopic/surgical recurrence after resection in Crohn’s disease (CD). Inclusion of mesentery in surgical resection specimens has been shown to reduce surgical recurrence after ileocolonic resection in CD. However, there is no uniform histopathological staging system for risk stratification in postoperative CD to systematically predict postoperative recurrence. This is because the prediction to date is based on clinical characteristics (smoking status, disease phenotype, surgical history). Histopathological predictors are still not adopted in routine clinical practice due to the lack of a uniform staging system, heterogeneity of published studies and lack of standardized definition of histological features. In this article, we attempted to incorporate all such histological features in a single histological staging system CNM (Crohn’s primary site [resection margin positivity, plexitis, granuloma, depth of infiltration], nodes [presence of granuloma], mesentery [involved or not]) in surgical resection specimen in CD. The proposed CNM classification would help to enable systematic reporting, design future clinical trials, stratify postoperative recurrence risk and choose appropriate postoperative prophylaxis.

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Endoscopic Assessment of Postoperative Recurrence in Crohn's Disease
Partha Pal, Duvvuru Nageshwar Reddy, Guduru Venkat Rao
Gastrointestinal Endoscopy Clinics of North America.2024;[Epub] CrossRef

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IBD

Performing colonoscopy before steroid induction is associated with shorter steroid use in patients with ulcerative colitis: Taku Kobayashi, Eri Udagawa, Lisa Hirose, Toshifumi Hibi; Intest Res 2023;21(2):205-215. Published online December 15, 2022; DOI: https://doi.org/10.5217/ir.2021.00164

Abstract PDF PubReader ePub: Background/Aims
Risks of long-term steroid use in patients with ulcerative colitis (UC) outweigh the benefits, thus dosing should be tapered once a response is achieved. Colonoscopy is a key technique for assessing disease severity and optimizing treatment involving steroids. This retrospective longitudinal cohort study of patients with UC explored factors associated with the duration of systemic steroid use.
Methods
The Japan Medical Data Center database, an employer-based insurance claims database, was used to select individuals initiating prednisolone, with a prescription issued between January 1, 2010, and January 31, 2018. The study included adults with a confirmed diagnosis of UC, who had received ≥1 year of continuous treatment with 5-aminosalicylic acid, biologics, or thiopurine. Factors associated with prednisolone duration were assessed using a multivariate regression model.
Results
Median duration of prednisolone treatment was 98 days, and colonoscopy was performed ≤1 month before or at the first prescription of prednisolone (index date) in 32.8% of patients (607/1,853). Shorter durations of prednisolone treatment were associated with colonoscopy ≤1 month before or at the index date and higher prednisolone dose at index date, with incidence rate ratios (IRRs) of 0.776 (95% confidence interval [CI], 0.682–0.884; P<0.001) and 0.998 (95% CI, 0.996–1.000; P=0.018), respectively. Charlson Comorbidity Index scores of 1 and ≥2 predicted longer prednisolone treatment (IRR, 1.332; 95% CI, 1.174–1.511; P<0.001 and IRR, 1.599; 95% CI, 1.357–1.885; P<0.001, respectively).
Conclusions
Performing colonoscopy before or at the time of initiating steroid was associated with a shorter duration of steroid use in patients with UC.

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IBD

Clinical spectrum of elderly-onset inflammatory bowel disease in India: Yogesh Kumar Gupta, Arshdeep Singh, Vikram Narang, Vandana Midha, Ramit Mahajan, Varun Mehta, Dharmatma Singh, Namita Bansal, Madeline Vithya Barnaba Durairaj, Amit Kumar Dutta, Ajit Sood; Intest Res 2023;21(2):216-225. Published online August 8, 2022; DOI: https://doi.org/10.5217/ir.2021.00177

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Background/Aims
Inflammatory bowel disease (IBD) is increasingly being recognized in elderly patients. Data on clinical spectrum of elderly-onset IBD patients is lacking from India.
Methods
A cross-sectional retrospective analysis of a prospectively maintained database of patients diagnosed with IBD was conducted at 2 centers in India. The clinical spectrum of elderly-onset IBD including demographic profile (age and sex), clinical presentation, disease characteristics (disease behavior and severity, extent of disease), and treatment were recorded and compared with adult-onset IBD.
Results
During the study period, 3,922 (3,172 ulcerative colitis [UC] and 750 Crohn’s disease [CD]) patients with IBD were recorded in the database. A total of 186 patients (4.74%; 116 males [62.36%]) had elderly-onset IBD (69.35% UC and 30.64% CD). Diarrhea, blood in stools, nocturnal frequency and pain abdomen were the commonest presentations for UC, whereas pain abdomen, weight loss and diarrhea were the most frequent symptoms in CD. For both elderly onset UC and CD, majority of the patients had moderately severe disease. Left-sided colitis was the commonest disease location in UC. Isolated ileal disease and inflammatory behavior were the most common disease location and behavior, respectively in CD. 5-Aminosalicylates were the commonest prescribed drug for both elderly onset UC and CD. Thiopurines and biologics were used infrequently. Prevalence of colorectal cancer was higher in elderly onset IBD.
Conclusions
Elderly onset IBD is not uncommon in India. Both the elderly onset UC and CD were milder, with no significant differences in disease characteristics (disease extent, location and behavior) when compared to adult-onset IBD. Colorectal cancer was more common in elderly onset IBD.

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Impact of age at diagnosis on long‐term prognosis in patients with intestinal Behçet's disease
Ji Young Chang, Soo Jung Park, Jae Jun Park, Tae Il Kim, Jae Hee Cheon, Jihye Park
Journal of Gastroenterology and Hepatology.2024; 39(3): 519. CrossRef
Neither hepatic steatosis nor fibrosis is associated with clinical outcomes in patients with intestinal Behçet’s disease
Hye Kyung Hyun, Jihye Park, Soo Jung Park, Jae Jun Park, Tae Il Kim, Jae Seung Lee, Hye Won Lee, Beom Kyung Kim, Jun Yong Park, Do Young Kim, Sang Hoon Ahn, Seung Up Kim, Jae Hee Cheon
European Journal of Gastroenterology & Hepatology.2024; 36(4): 445. CrossRef
A prospective study of inflammatory bowel disease phenotypes in extremes of age and comparison with adults
Nikhil Bhangale, Devendra Desai, Philip Abraham, Tarun Gupta, Pavan Dhoble, Anand Joshi
Indian Journal of Gastroenterology.2023; 42(3): 404. CrossRef
Global Epidemiology and Burden of Elderly-Onset Inflammatory Bowel Disease: A Decade in Review
Pojsakorn Danpanichkul, Kanokphong Suparan, Suchapa Arayakarnkul, Aunchalee Jaroenlapnopparat, Natchaya Polpichai, Panisara Fangsaard, Siwanart Kongarin, Karan Srisurapanont, Banthoon Sukphutanan, Wasuwit Wanchaitanawong, Yatawee Kanjanakot, Jakrapun Pupa
Journal of Clinical Medicine.2023; 12(15): 5142. CrossRef

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Infection

Interferon-gamma release assay has poor diagnostic accuracy in differentiating intestinal tuberculosis from Crohn’s disease in tuberculosis endemic areas: Karan Sachdeva, Peeyush Kumar, Bhaskar Kante, Sudheer K. Vuyyuru, Srikant Mohta, Mukesh K. Ranjan, Mukesh K. Singh, Mahak Verma, Govind Makharia, Saurabh Kedia, Vineet Ahuja; Intest Res 2023;21(2):226-234. Published online June 13, 2022; DOI: https://doi.org/10.5217/ir.2022.00010

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Background/Aims
Intestinal tuberculosis (ITB) and Crohn’s disease (CD) frequently present with a diagnostic dilemma because of similar presentation. Interferon-gamma release assay (IGRA) has been used in differentiating ITB from CD, but with sparse reports on its diagnostic accuracy in tuberculosis endemic regions and this study evaluated the same.
Methods
Patients with definitive diagnosis of ITB (n=59) or CD (n=49) who underwent IGRA testing (n=307) were retrospectively included at All India Institute of Medical Sciences, New Delhi (July 2014 to September 2021). CD or ITB was diagnosed as per standard criteria. IGRA was considered positive at >0.35 IU/mL. Relevant data was collected and IGRA results were compared between ITB and CD to determine its accuracy.
Results
Among 59 ITB patients (mean age, 32.6±13.1 years; median disease duration, 1 year; male, 59.3%), 24 were positive and 35 tested negative for IGRA. Among 49 CD patients (mean age, 37.8±14.0; median disease duration, 4 years; male, 61.2%), 12 were positive and 37 tested negative for IGRA. Hence, for diagnosing ITB, IGRA showed a sensitivity, specificity, positive and negative predictive values of 40.68%, 75.51%, 66.67%, and 51.39%, respectively. The area under the curve of IGRA for ITB diagnosis was 0.66 (95% confidence interval, 0.55–0.75). In a subset (n=64), tuberculin skin test (TST) showed sensitivity, specificity, positive and negative predictive values of 64.7%, 73.3%, 73.3%, and 64.71%, respectively. IGRA and TST were concordant in 38 (59.4%) patients with κ=0.17.
Conclusions
In a tuberculosis endemic region, IGRA had poor diagnostic accuracy for differentiating ITB from CD, suggesting a limited value of IGRA in this setting.

Citations

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New diagnostic strategies to distinguish Crohn's disease and gastrointestinal tuberculosis
Himanshu Narang, Saurabh Kedia, Vineet Ahuja
Current Opinion in Infectious Diseases.2024;[Epub] CrossRef
Interferon-gamma release assays as a tool for differential diagnosis of gastrointestinal tuberculosis
Tsvetelina Velikova, Anita Aleksandrova
World Journal of Clinical Cases.2024; 12(27): 6015. CrossRef
Diagnostic yield and technical performance of the novel motorized spiral enteroscopy compared with single-balloon enteroscopy in suspected Crohn's disease: a prospective study (with video)
Partha Pal, Piyush Vishwakarma, Aniruddha Pratap Singh, Palle Manohar Reddy, Mohan Ramchandani, Rupa Banerjee, Anuradha Sekaran, Polina Vijayalaxmi, Hardik Rughwani, Pradev Inavolu, Santosh Darishetty, Pradeep Rebala, Guduru Venkat Rao, Manu Tandan, D. Na
Gastrointestinal Endoscopy.2023; 97(3): 493. CrossRef
Evidence-based approach to diagnosis and management of abdominal tuberculosis
Daya Krishna Jha, Mythili Menon Pathiyil, Vishal Sharma
Indian Journal of Gastroenterology.2023; 42(1): 17. CrossRef
Technical performance and diagnostic yield of motorised spiral enteroscopy compared with single-balloon enteroscopy in suspected Crohn’s disease: a randomised controlled, open-label study (the MOTOR-CD trial)
Partha Pal, Mohan Ramchandani, Rupa Banerjee, Piyush Viswakarma, Aniruddha Pratap Singh, Manohar Reddy, Hardik Rughwani, Rajendra Patel, Anuradha Sekaran, Swathi Kanaganti, Santosh Darisetty, Zaheer Nabi, Jagadish Singh, Rajesh Gupta, Sundeep Lakhtakia, R
Gut.2023; 72(10): 1866. CrossRef

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IBD

Laparoscopic surgery contributes to a decrease in short-term complications in surgical ulcerative colitis patients during 2008–2017: a multicenter retrospective study in China: Zerong Cai, Xiaosheng He, Jianfeng Gong, Peng Du, Wenjian Meng, Wei Zhou, Jinbo Jiang, Bin Wu, Weitang Yuan, Qi Xue, Lianwen Yuan, Jinhai Wang, Jiandong Tai, Jie Liang, Weiming Zhu, Ping Lan, Xiaojian Wu; Intest Res 2023;21(2):235-243. Published online December 2, 2022; DOI: https://doi.org/10.5217/ir.2022.00012

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Background/Aims
The aim of this study was to analyze the chronological changes in postoperative complications in surgical ulcerative colitis patients over the past decade in China and to investigate the potential parameters that contributed to the changes.
Methods
Ulcerative colitis patients who underwent surgery during 2008–2017 were retrospectively enrolled from 13 hospitals in China. Postoperative complications were compared among different operation years. Risk factors for complications were identified by logistic regression analysis.
Results
A total of 446 surgical ulcerative colitis patients were analyzed. Fewer short-term complications (24.8% vs. 41.0%, P=0.001) and more laparoscopic surgeries (66.4% vs. 25.0%, P<0.001) were found among patients who received surgery during 2014–2017 than 2008–2013. Logistic regression suggested that independent protective factors against short-term complications were a higher preoperative body mass index (odds ratio [OR], 0.870; 95% confidence interval [CI], 0.785–0.964; P=0.008), laparoscopic surgery (OR, 0.391; 95% CI, 0.217–0.705; P=0.002) and elective surgery (OR, 0.213; 95% CI, 0.067–0.675; P=0.009). The chronological decrease in short-term complications was associated with an increase in laparoscopic surgery.
Conclusions
Our data revealed a downward trend of short-term postoperative complications among surgical ulcerative colitis patients in China during the past decade, which may be due to the promotion of minimally invasive techniques among Chinese surgeons.

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Surgical Options for Appropriate Length of J-Pouch Construction for Better Outcomes and Long-term Quality of Life in Patients with Ulcerative Colitis after Ileal Pouch-Anal Anastomosis
Weimin Xu, Wenbo Tang, Wenjun Ding, Zhebin Hua, Yaosheng Wang, Xiaolong Ge, Long Cui, Xiaojian Wu, Wei Zhou, Zhao Ding, Peng Du
Gut and Liver.2024; 18(1): 85. CrossRef
Time trend in surgical indications and outcomes in ulcerative colitis—A two decades in-depth retrospective analysis
Guillaume Le Cosquer, Lena Capirchio, Pauline Rivière, Marie Armelle Denis, Florian Poullenot, Christophe Remue, Frank Zerbib, Daniel Leonard, Bertrand Célérier, Alex Kartheuser, David Laharie, Olivier Dewit
Digestive and Liver Disease.2023; 55(10): 1338. CrossRef
Surgical Treatment in Ulcerative Colitis, Still Topical: A Narrative Review
Eduard Slonovschi, Pratyusha Kodela, Monalisa Okeke, Sandeep Guntuku, Shanmukh Sai Pavan Lingamsetty
Cureus.2023;[Epub] CrossRef
Surgical outcomes and stoma-related complications in inflammatory bowel disease in Saudi Arabia: a retrospective study
Thamer A. Bin Traiki, Sulaiman A. Alshammari, Mansoor A. Abdulla, Fayez G. Aldarsouni, Noura S. Alhassan, Maha-Hamdien Abdullah, Awadh Alqahtani, Khayal A. Alkhayal
Annals of Saudi Medicine.2023; 43(6): 386. CrossRef

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IBD

Concomitant ankylosing spondylitis can increase the risk of biologics or small molecule therapies to control inflammatory bowel disease: Yu Kyung Jun, Hyuk Yoon, Seong-Joon Koh, A Hyeon Kim, Kwang Woo Kim, Jun Won Park, Hyun Jung Lee, Hyoun Woo Kang, Jong Pil Im, Young Soo Park, Joo Sung Kim, on behalf of Seoul National University Inflammatory Bowel Disease Research Network (SIRN); Intest Res 2023;21(2):244-251. Published online August 8, 2022; DOI: https://doi.org/10.5217/ir.2022.00057

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Background/Aims
Patients with inflammatory bowel disease (IBD) are diagnosed with ankylosing spondylitis (AS) often. However, the disease course of patients with both IBD and AS is not well understood. This study aims to evaluate the effect of concomitant AS on IBD outcomes.
Methods
Among the 4,722 patients with IBD who were treated in 3 academic hospitals from 2004 to 2021, 55 were also diagnosed with AS (IBD-AS group). Based on patients’ electronic medical records, the outcomes of IBD in IBD-AS group and IBD group without AS (IBD-only group) were appraised.
Results
The proportion of patients treated with biologics or small molecule therapies was significantly higher in IBD-AS group than the proportion in IBD-only group (27.3% vs. 12.7%, P= 0.036). Patients with both ulcerative colitis and AS had a significantly higher risk of biologics or small molecule therapies than patients with only ulcerative colitis (P< 0.001). For univariable logistic regression, biologics or small molecule therapies were associated with concomitant AS (odds ratio, 4.099; 95% confidence interval, 1.863–9.021; P< 0.001) and Crohn’s disease (odds ratio, 3.552; 95% confidence interval, 1.590–7.934; P= 0.002).
Conclusions
Concomitant AS is associated with the high possibility of biologics or small molecule therapies for IBD. IBD patients who also had AS may need more careful examination and active treatment to alleviate the severity of IBD.

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Risk of all-cause and cause-specific mortality associated with immune-mediated inflammatory diseases in Korea
Oh Chan Kwon, See Young Lee, Jaeyoung Chun, Kyungdo Han, Yuna Kim, Ryul Kim, Min-Chan Park, Jie-Hyun Kim, Young Hoon Youn, Hyojin Park
Frontiers in Medicine.2023;[Epub] CrossRef

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IBD

Risks of colorectal cancer and biliary cancer according to accompanied primary sclerosing cholangitis in Korean patients with ulcerative colitis: a nationwide population-based study: Eun Hye Oh, Ye-Jee Kim, Minju Kim, Seung Ha Park, Tae Oh Kim, Sang Hyoung Park; Intest Res 2023;21(2):252-265. Published online December 2, 2022; DOI: https://doi.org/10.5217/ir.2022.00092

Abstract PDF Supplementary Material PubReader ePub

Background/Aims
We conducted a nationwide population-based study to investigate incidence rates of colorectal and biliary cancers according to accompanying primary sclerosing cholangitis in Korean ulcerative colitis patients.
Methods
We used the Health Insurance Review and Assessment claim database from January 2007 to April 2020. Standardized incidence ratios of colorectal and biliary cancers in ulcerative colitis patients were calculated.
Results
Among 35,189 newly diagnosed ulcerative colitis patients, 1,224 patients were diagnosed with primary sclerosing cholangitis. During the study period, 122 and 52 patients were diagnosed with colorectal and biliary cancers, respectively. Incidences of colorectal cancer were not higher in ulcerative colitis patients than those in the general population (standardized incidence ratios, 0.83; 95% confidence interval, 0.69–0.99), regardless of accompanied primary sclerosing cholangitis (standardized incidence ratio, 0.73; 95% confidence interval, 0.24–1.71). While incidences of biliary cancer were not higher in ulcerative colitis patients than those in the general population (standardized incidence ratio, 1.14; 95% confidence interval, 0.80–1.58), these were much higher with accompanied primary sclerosing cholangitis (standardized incidence ratio, 10.07; 95% confidence interval, 5.75–16.36). Cumulative incidences of colorectal and biliary cancers increased in patients who were diagnosed with ulcerative colitis at an older age.
Conclusions
In Korean ulcerative colitis patients, colorectal cancer incidences were not higher than those in the general population regardless of accompanied primary sclerosing cholangitis. However, biliary cancer incidences were much higher in ulcerative colitis patients with primary sclerosing cholangitis than in those without, or in the general population.

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Treatment of primary sclerosing cholangitis combined with inflammatory bowel disease
You Sun Kim, Edward H. Hurley, Yoojeong Park, Sungjin Ko
Intestinal Research.2023; 21(4): 420. CrossRef
Are the risks of colorectal cancer and biliary cancer really increased if patients with ulcerative colitis have primary sclerosing cholangitis?
Jung Wook Lee, Won Moon
Intestinal Research.2023; 21(2): 171. CrossRef