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Original Articles
Characteristics of monogenic inflammatory bowel disease in very early-onset cases: a Japanese multicenter registry study
Natsuki Ito, Takahiro Kudo, Keisuke Jimbo, Ryusuke Nambu, Fumihiko Kakuta, Tatsuki Mizuochi, Takeshi Saito, Shin-ichiro Hagiwara, Naomi Iwata, Nao Tachibana, Hideki Kumagai, Takashi Ishige, Toshifumi Yodoshi, Mikihiro Inoue, Shigeo Nishimata, Hitoshi Tajiri, Eitaro Hiejima, Mika Sasaki, Sawako Kato, Hirotaka Shimizu, Yuri Hirano, Toshiaki Shimizu, Katsuhiro Arai, Japanese Pediatric Inflammatory Bowel Disease Registry (JPIBD-R)
Received September 1, 2025  Accepted December 22, 2025  Published online February 24, 2026  
DOI: https://doi.org/10.5217/ir.2025.00203    [Epub ahead of print]
AbstractAbstract PDFPubReaderePub
Background/Aims
Very early-onset inflammatory bowel disease (VEO-IBD), defined as IBD diagnosed before 6 years of age, is highly influenced by genetic factors. Monogenic IBD is a type of enterocolitis caused by a single pathogenic variant. However, information on Asian patients with VEO-IBD and monogenic IBD is limited. This study investigated real-world data on VEOIBD and monogenic IBD in Japan.
Methods
We evaluated patients with VEO-IBD registered in the Japanese Pediatric Inflammatory Bowel Disease Registry, a multicenter prospective registry study conducted between 2012 and 2021. We categorized patients into monogenic and non-monogenic IBD groups and compared their clinical characteristics and outcomes.
Results
Among 703 pediatric patients with IBD, 68 (9.7%) had VEO-IBD. Of these, 26 (38.2%) had ulcerative colitis, 16 (23.5%) had Crohn’s disease, 23 (33.8%) had unclassified IBD (IBD-U), and 3 (4.4%) had Behçet’s disease. Genetic testing was performed in 25 patients (36.8%), and monogenic IBD was identified in 5 of the 23 patients with IBD-U (7.4% of the VEO-IBD cohort). All 5 monogenic cases presented with an IBD-U phenotype. Monogenic IBD included A20 haploinsufficiency, interleukin-10 receptor subunit alpha deficiency, chronic granulomatous disease, Wiskott–Aldrich syndrome, and Hermansky–Pudlak syndrome. Monogenic IBD was significantly associated with IBD-U phenotype (P= 0.015) and severe infections before 1 year of age (P= 0.004).
Conclusions
Patients with VEO-IBD who present an IBD-U phenotype and have a history of severe infections during infancy should be prioritized for genetic analysis to investigate the possibility of monogenic IBD.
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Orofacial granulomatosis in pediatric Crohn’s disease: clinical outcomes and genetic background in the era of biologics: a retrospective study in Japan
Ryusuke Nambu, Takeo Naito, Mei Haruyama, Junichi Hosokawa, Hirotaka Shimizu, Ichiro Takeuchi, Shin-ichiro Hagiwara, Tatsuki Mizuochi, Yugo Takaki, Takashi Ishige, Takuya Nishizawa, Takahiro Kudo, Natsuki Ito, Yosuke Kawai, Yoichi Kakuta, Masao Nagasaki, Toshiaki Shimizu, Itaru Iwama, Katsuhiro Arai
Received June 18, 2025  Accepted September 1, 2025  Published online January 2, 2026  
DOI: https://doi.org/10.5217/ir.2025.00109    [Epub ahead of print]
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Background/Aims
Occasionally, pediatric Crohn’s disease (CD) may develop after diagnosis of orofacial granulomatosis (OFG), which is characterized by chronic granulomatous lesions of the oral mucosa, lips, and perioral area. This study aimed to clarify clinical characteristics, treatment responses, and potential genetic contributors in pediatric patients with CD complicating OFG.
Methods
We studied pediatric patients with CD complicating OFG who were treated from 2013 to 2022 at 7 Japanese institutions specializing in pediatric inflammatory bowel disease. Their clinical courses were analyzed retrospectively, and analyses of 71 genes associated with monogenic inflammatory bowel disease were performed.
Results
Among 13 patients, 8 were girls. Median ages at diagnosis of OFG and CD were 9.2 (3.8–15.3) and 10.3 (6.4–15.3) years old, respectively. Upper gastrointestinal lesions were frequent in 8 cases (62%), while perianal lesions were present in 7 (54%). OFG failed to improve or relapsed despite remission of intestinal lesions in about half of the patients (n = 7, 54%). During follow-up, OFG went into remission in 7 patients, including 6 of the 9 who were treated with biologics (66%) and 1 of the 4 who were not (25%). In 8 patients, the NCF1 p.Arg90His allele was detected by genetic analysis; 7 were heterozygous and 1 homozygous, a higher prevalence than in the general Japanese population.
Conclusions
Clinical features of OFG associated with pediatric CD are diverse, and biologic agents were beneficial for OFG patients. NCF1 p.Arg90His mutation may contribute to the pathogenesis of pediatric CD complicating OFG.
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Case Report
IBD
Inflammatory bowel disease in a young female patient with a novel de novo TRAF3 frameshift variant responsive to ustekinumab: a case report
Ichiro Takeuchi, Kosuke Taniguchi, Katsuhiro Arai, Toru Uchiyama, Miho Terao, Asuka Hori, Toshinao Kawai, Takako Yoshioka, Reiko Kyodo, Hirotaka Shimizu, Satoshi Fujita, Kenichiro Motomura, Yuka Okazaki, Takashi Ishikawa, Masao Ogura, Kentaro Hayashi, Kenji Matsumoto, Shuji Takada, Masafumi Onodera, Hideaki Morita, Kenichiro Hata
Intest Res 2026;24(1):182-188.   Published online April 4, 2025
DOI: https://doi.org/10.5217/ir.2024.00190
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Tumor necrosis factor receptor-associated factor 3 (TRAF3) is an anti-inflammatory molecule that negatively regulates the non-canonical nuclear factor-κB pathway. Although TRAF3 haploinsufficiency (TRAF3 HI) can influence innate and adaptive immune cells, its effect on inflammatory bowel disease (IBD) development remains unclear. Here, we report the first case of severe early-onset IBD with a novel TRAF3 variant leading to HI, successfully treated with ustekinumab. A 6-year-old girl with a recurrent parotitis, otitis media, tonsilitis, and atopic dermatitis developed IBD involving the stomach, small intestine, and colon. At diagnosis, the immunoglobulin (Ig)G and IgA levels were relatively high, and lymphocyte subsets showed increased counts of plasmablasts, class-switch recombination B cells, and circulating T-follicular helper cells. Treatment with azathioprine and infliximab failed to maintain remission marked by several relapses accompanied by erythema nodosum and arthritis; however, ustekinumab, an anti-interleukin (IL)-12/23p40 antibody, led to long-term clinical remission, normalizing the Ig level and reducing abnormal lymphocyte counts. Whole-exome sequencing revealed a novel heterozygous mutation in TRAF3 [p.(Pro487Leufs*8)], resulting in TRAF3 under-expression. Our case may highlight the contribution of TRAF3 HI to the development of IBD and provide insights into IBD pathophysiology, suggesting the involvement of the IL-12/23-T-follicular helper cell pathway affected by genetic mutations.
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Original Articles
IBD
Characteristics and long-term outcomes of children with perianal Crohn’s disease
Ching-Chun Lin, Ichiro Takeuchi, Hirotaka Shimizu, Reiko Kyodo, Mitsuru Kubota, Akira Ishiguro, Katsuhiro Arai
Intest Res 2026;24(1):164-173.   Published online March 5, 2025
DOI: https://doi.org/10.5217/ir.2024.00154
AbstractAbstract PDFPubReaderePub
Background/Aims
The incidence of perianal lesions (PL) in children with Crohn’s disease (CD) is higher in East Asia than in Western countries. Early intervention for PL is essential to prevent sphincter dysfunction and ostomy placement. In this study, we aimed to investigate the clinical features, treatment, and consequences of pediatric CD with PL.
Methods
We retrospectively reviewed a cohort of children diagnosed with CD from 2010 to 2020 at a Japanese children’s hospital. Demographics, treatments, and outcomes were evaluated and compared among subgroups.
Results
Among 112 pediatric patients with CD, 36 (32.1%) had experienced PL during the observational period. The median ages at diagnosis and follow-up periods were 131 and 70 months, respectively. Six (85.7%) patients in the very early-onset (VEO) group (CD diagnosed before 6 years old) and 24 (82.8%) in the older age group had PL upon diagnosis of CD (P= 0.851). Biologics were given to 94.4% of patients: infliximab (67.7%), adalimumab (58.8%), ustekinumab (44.1%), risankizumab (11.8%), and vedolizumab (5.9%). Biologics were introduced within 1 year in 89.5% and 40.0% of patients diagnosed in 2016–2020 and 2010–2016, respectively (P= 0.002). Seton was frequently used in the older age group (87.5 vs. 42.9%, P= 0.190). Ostomy was frequently required in the VEO group (42.9% vs. 0.0%, P= 0.006).
Conclusions
Patients with VEO-CD and PL had a notably high risk of ostomy placement. The earlier introduction of biologics and surgical interventions reduced corticosteroids use and ostomy placement in pediatric CD patients with PL.

Citations

Citations to this article as recorded by  
  • Asian–Pacific perspectives on the management of very early-onset inflammatory bowel disease
    Ichiro Takeuchi, Katsuhiro Arai, Pornthep Tanpowpong, Ming-Wei Lai, Andrew S Day, Way Seah Lee, James Guoxian Huang, Karen Sophia Calixto-Mercado, Rosanna Ming Sum Wong, Muhammad Arshad Alvi, Zubin Grover, Jung Ok Shim, Ujjal Poddar
    Intestinal Research.2025; 23(4): 405.     CrossRef
  • 6,074 View
  • 454 Download
  • 1 Web of Science
  • 1 Crossref
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IBD
Process of empowerment in mothers of children with very-early-onset inflammatory bowel disease: a qualitative study
Mikako Yokoo, Satomi Nomura, Satoe Fukui, Ichiro Takeuchi, Hirotaka Shimizu, Katsuhiro Arai
Intest Res 2026;24(1):151-163.   Published online February 24, 2025
DOI: https://doi.org/10.5217/ir.2024.00048
AbstractAbstract PDFPubReaderePub
Background/Aims
Mothers of children with very-early-onset inflammatory bowel disease (VEO-IBD) face unique challenges; however, these challenges and their consequences have not been well described. This study clarified the experiences and processes of empowerment of mothers of children with VEO-IBD.
Methods
This study performed a qualitative inductive analysis using semi-structured interviews. The interview content was transcribed, generating core categories, categories, and subcategories with a focus on mothers raising children with VEO-IBD. A modified grounded theory approach was employed to inductively construct a theory from the qualitative data.
Results
Fifteen mothers of children with VEO-IBD were interviewed (mean age, 43.9 ± 6.2 years). The modified grounded theory approach revealed the processes experienced by the mothers. The mothers faced various difficulties when their children developed VEO-IBD; however, their efforts to cope with these difficulties changed their situation. Furthermore, they were supported by various individuals, including family members, medical personnel, and, occasionally, families of other children with VEO-IBD. These processes strengthened and empowered the mothers.
Conclusions
Mothers of children with VEO-IBD who faced various difficulties were empowered through their efforts and support from family and others who understood their challenges. This process of empowerment continues throughout the development of children with VEO-IBD.
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IBD
Clinical features of very early-onset inflammatory bowel disease in Japan: a retrospective single-center study
Masaaki Usami, Ichiro Takeuchi, Reiko Kyodo, Yuri Hirano, Kosuke Kashiwagi, Hiroki Fujikawa, Hirotaka Shimizu, Toshinao Kawai, Katsuhiro Arai
Intest Res 2022;20(4):475-481.   Published online June 13, 2022
DOI: https://doi.org/10.5217/ir.2021.00142
AbstractAbstract PDFPubReaderePub
Background/Aims
Very early-onset inflammatory bowel disease (VEO-IBD), defined as IBD diagnosed in patients younger than 6 years, is a challenge for pediatric gastroenterologists. Although there have been reports regarding VEO-IBD in Western countries, those in Asia are still lacking. This study aimed to investigate the clinical features of Japanese VEO-IBD patients.
Methods
Patients with VEO-IBD diagnosed between 2006 and 2019 were evaluated retrospectively. The disease phenotypes were classified into ulcerative colitis type (UC-type) and Crohn’s disease type (CD-type), and the clinical features and courses were compared between the phenotypes.
Results
Overall, 54 VEO-IBD patients (19 patients with UC-type and 35 patients with CD-type) were evaluated. The median age at onset was 18 months. One patient had severe combined immunodeficiency (SCID), and 9 patients had monogenic IBD. Monogenic IBD was more prevalent in the CD-type patients with perianal disease (CD-type (PD)). The age at onset was significantly lower in the CD-type group (P<0.05). The most common initial symptom was bloody stools (70%), followed by diarrhea (63%), weight loss (24%), fever (20%), and perianal disease (20%). Excluding patients with SCID and monogenic IBD, 23 out of 44 patients (52%) required biologics. The biologics were switched in 11 out of 44 patients (25%), and the majority of these patients (82%) were in the CD-type group. Overall, 9 patients (20%) required intestinal resection or ostomy placement.
Conclusions
CD-type tends to occur at an earlier age, and monogenic IBD occurs significantly more frequently in CD-type (PD). Disease severity and treatment should be individualized, owing to the disease heterogeneity.

Citations

Citations to this article as recorded by  
  • Process of empowerment in mothers of children with very-early-onset inflammatory bowel disease: a qualitative study
    Mikako Yokoo, Satomi Nomura, Satoe Fukui, Ichiro Takeuchi, Hirotaka Shimizu, Katsuhiro Arai
    Intestinal Research.2026; 24(1): 151.     CrossRef
  • Long‐term clinical and endoscopic outcomes of ustekinumab in pediatric Crohn's disease with anti‐tumor necrosis factor failure
    Yoko Yamamoto, Ichiro Takeuchi, Hirotaka Shimizu, Hiroki Fujikawa, Masanori Toda, Eri Miyata, Hiroaki To, Satoru Nagata, Katsuhiro Arai
    Journal of Gastroenterology and Hepatology.2025; 40(1): 123.     CrossRef
  • Disease phenotypic and outcome of very-early onset inflammatory bowel disease in Asian children: an understudied population
    Way-Seah Lee, Kee-Seang Chew, James-Guoxian Huang, Pornthep Tanpowpong, Karen S. C. Mercado, Almida Reodica, Veena Logarajah, K. L. W. Hathagoda, Shaman Rajindrajith, Yoko Kin-Yoke Wong, Suporn Treepongkaruna, Marion Margaret Aw
    Frontiers in Pediatrics.2025;[Epub]     CrossRef
  • Curing inflammatory bowel diseases: breaking the barriers of current therapies– emerging strategies for a definitive treatment
    Daniele Noviello, Chiara Amoroso, Maurizio Vecchi, Federica Facciotti, Flavio Caprioli
    Current Opinion in Immunology.2025; 95: 102593.     CrossRef
  • Feasibility and Safety of Small Bowel Capsule Endoscopy in Very Early-Onset Inflammatory Bowel Disease: A Multi-Institutional Study
    Shin-ichiro Hagiwara, Hirotaka Shimizu, Ryusuke Nambu, Keisuke Jimbo, Emiri Kaji, Takuya Nishizawa, Fumihiko Kakuta, Itaru Iwama, Takashi Ishige, Takahiro Kudo, Katsuhiro Arai
    Inflammatory Bowel Diseases.2025; 31(12): 3279.     CrossRef
  • Asian–Pacific perspectives on the management of very early-onset inflammatory bowel disease
    Ichiro Takeuchi, Katsuhiro Arai, Pornthep Tanpowpong, Ming-Wei Lai, Andrew S Day, Way Seah Lee, James Guoxian Huang, Karen Sophia Calixto-Mercado, Rosanna Ming Sum Wong, Muhammad Arshad Alvi, Zubin Grover, Jung Ok Shim, Ujjal Poddar
    Intestinal Research.2025; 23(4): 405.     CrossRef
  • 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
  • Surgical outcomes of very-early-onset ulcerative colitis: retrospective comparative study with older pediatric patients
    Takashi Fumita, Keita Terui, Ryohei Shibata, Ayako Takenouchi, Shugo Komatsu, Satoru Oita, Hiroko Yoshizawa, Yuichi Hirano, Yusaku Yoshino, Takeshi Saito, Tomoro Hishiki
    Pediatric Surgery International.2024;[Epub]     CrossRef
  • Fecal Calprotectin at Postinduction Is Capable of Predicting Persistent Remission and Endoscopic Healing after 1 Year of Treatment with Infliximab in Pediatric Patients with Crohn’s Disease
    Yoo Min Lee, Eun Sil Kim, Sujin Choi, Hyo-Jeong Jang, Yu Bin Kim, So Yoon Choi, Byung-Ho Choe, Ben Kang
    Gut and Liver.2024; 18(3): 498.     CrossRef
  • Genomic testing identifies monogenic causes in patients with very early-onset inflammatory bowel disease: a multicenter survey in an Iranian cohort
    Golnaz Eslamian, Mahnaz Jamee, Tooba Momen, Pejman Rohani, Sarehossadat Ebrahimi, Mehrnaz Mesdaghi, Soodeh Ghadimi, Mahboubeh Mansouri, Seyed Alireza Mahdaviani, Mahnaz Sadeghi-shabestari, Morteza Fallahpour, Bibi Shahin Shamsian, Narges Eslami, Samin Sha
    Clinical and Experimental Immunology.2024; 217(1): 1.     CrossRef
  • 8,197 View
  • 418 Download
  • 11 Web of Science
  • 11 Crossref
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Inflammatory bowel diseases
Phenotypic characteristics of pediatric inflammatory bowel disease in Japan: results from a multicenter registry
Katsuhiro Arai, Reiko Kunisaki, Fumihiko Kakuta, Shin-ichiro Hagiwara, Takatsugu Murakoshi, Tadahiro Yanagi, Toshiaki Shimizu, Sawako Kato, Takashi Ishige, Tomoki Aomatsu, Mikihiro Inoue, Takeshi Saito, Itaru Iwama, Hisashi Kawashima, Hideki Kumagai, Hitoshi Tajiri, Naomi Iwata, Takahiro Mochizuki, Atsuko Noguchi, Toshihiko Kashiwabara, Hirotaka Shimizu, Yasuo Suzuki, Yuri Hirano, Takeo Fujiwara
Intest Res 2020;18(4):412-420.   Published online August 18, 2020
DOI: https://doi.org/10.5217/ir.2019.00130
AbstractAbstract PDFPubReaderePub
Background/Aims
There are few published registry studies from Asia on pediatric inflammatory bowel disease (IBD). Registry network data enable comparisons among ethnic groups. This study examined the characteristics of IBD in Japanese children and compared them with those in European children.
Methods
This was a cross-sectional multicenter registry study of newly diagnosed Japanese pediatric IBD patients. The Paris classification was used to categorize IBD features, and results were compared with published EUROKIDS data.
Results
A total of 265 pediatric IBD patients were initially registered, with 22 later excluded for having incomplete demographic data. For the analysis, 91 Crohn’s disease (CD), 146 ulcerative colitis (UC), and 6 IBD-unclassified cases were eligible. For age at diagnosis, 20.9% of CD, 21.9% of UC, and 83.3% of IBD-unclassified cases were diagnosed before age 10 years. For CD location, 18.7%, 13.2%, 64.8%, 47.3%, and 20.9% were classified as involving L1 (ileocecum), L2 (colon), L3 (ileocolon), L4a (esophagus/stomach/duodenum), and L4b (jejunum/proximal ileum), respectively. For UC extent, 76% were classified as E4 (pancolitis). For CD behavior, B1 (non-stricturing/non-penetrating), B2 (stricturing), B3 (penetrating), and B2B3 were seen in 83.5%, 11.0%, 3.3%, and 2.2%, respectively. A comparison between Japanese and European children showed less L2 involvement (13.2% vs. 27.3%, P< 0.01) but more L4a (47.3% vs. 29.6%, P< 0.01) and L3 (64.8% vs. 52.7%, P< 0.05) involvement in Japanese CD children. Pediatric perianal CD was more prevalent in Japanese children (34.1% vs. 9.7%, P< 0.01).
Conclusions
Upper gastrointestinal and perianal CD lesions are more common in Japanese children than in European children.

Citations

Citations to this article as recorded by  
  • Diagnosis of Pediatric Inflammatory Bowel Disease (PIBD)–Implications for the Asia-Pacific Region: A Position Paper from the Asian Pan-Pacific Society for Pediatric Gastroenterology, Hepatology, and Nutrition PIBD Working Group
    Rohan Malik, Marion M Aw, Way Seah Lee, Andy Darma, Pornthep Tanpowpong, Nuthapong Ukarapol, James Guoxian Huang, Hong Ngoc Tran, Yen Hsuan Ni
    Pediatric Gastroenterology, Hepatology & Nutrition.2026; 29(1): 22.     CrossRef
  • Real-world outcomes of ustekinumab, vedolizumab, and tumor necrosis factor inhibitors in very-early-onset inflammatory bowel disease: a multi-center cohort study
    Ryusuke Nambu, Itaru Iwama, Ichiro Takeuchi, Shin-ichiro Hagiwara, Yuri Etani, Emiri Kaji, Atsushi Yoden, Fumihiko Kakuta, Yusuke Hoshi, Naoya Tsumura, Tatsuki Mizuochi, Hideki Kumagai, Koji Yokoyama, Takuya Nishizawa, Masaaki Usami, Yugo Takaki, Ryo Eban
    Journal of Gastroenterology.2026;[Epub]     CrossRef
  • Predictive Factors for Abnormal Diagnostic Colonoscopy Findings among Pediatric Patients: A Retrospective Cohort Study
    Kazuki Honjo, Keita Murakami, Junya Arai, Sozaburo Ihara, Hiroyuki Hisada, Dai Kubota, Ken Kurokawa, Yu Miyakawa, Mayo Tsuboi, Yuko Miura, Daisuke Ohki, Hiroya Mizutani, Chihiro Takeuchi, Seiichi Yakabi, Nobumi Suzuki, Hiroto Kinoshita, Yoku Hayakawa, Nao
    Digestive Diseases.2026; : 1.     CrossRef
  • Long‐term clinical and endoscopic outcomes of ustekinumab in pediatric Crohn's disease with anti‐tumor necrosis factor failure
    Yoko Yamamoto, Ichiro Takeuchi, Hirotaka Shimizu, Hiroki Fujikawa, Masanori Toda, Eri Miyata, Hiroaki To, Satoru Nagata, Katsuhiro Arai
    Journal of Gastroenterology and Hepatology.2025; 40(1): 123.     CrossRef
  • Outcome of pediatric inflammatory bowel disease in Asian children: a multinational 1-year follow-up study
    Pornthep Tanpowpong, Suporn Treepongkaruna, James Guoxian Huang, Kee Seang Chew, Karen Sophia Calixto Mercado, Almida Reodica, Shaman Rajindrajith, Wathsala Hathagoda, Yoko Kin Yoke Wong, Way Seah Lee, Marion Margaret Aw
    Clinical and Experimental Pediatrics.2025; 68(3): 247.     CrossRef
  • Phenotypic Differences and Clinical Outcomes of South Asian Children With IBD: A Singapore–Malaysia Study From the Asian PIBD Registry Network
    James Guoxian Huang, Kee Seang Chew, Veena Logarajah, Way Seah Lee, Marion Margaret Aw
    Journal of Gastroenterology and Hepatology.2025; 40(8): 1933.     CrossRef
  • Expert consensus on diagnostic guidelines for pediatric inflammatory bowel disease in Japan
    Takahiro Kudo, Katsuhiro Arai, Itaru Iwama, Shin-ichiro Hagiwara, Takashi Ishige, Koji Yokoyama, Fumihiko Kakuta, Keisuke Jimbo, Hiroki Kondou, Yugo Takaki, Shingo Kurasawa, Hiroki Fujikawa, Yuhki Koike, Fumihito Hirai, Shinya Ashizuka, Kenji Watanabe, To
    Journal of Gastroenterology.2025; 60(9): 1118.     CrossRef
  • Two Decades of Pediatric Inflammatory Bowel Disease in North-Western Romania: Phenotypic Characteristics and Diagnostic Trends
    Georgia Valentina Tartamus (Tita), Daniela Elena Serban, Marcel Vasile Tantau
    Journal of Clinical Medicine.2025; 14(13): 4597.     CrossRef
  • Growth impairment in Japanese children with inflammatory bowel disease: A multicenter prospective cohort study
    Hirotaka Shimizu, Ryusuke Nambu, Nao Tachibana, Reiko Kunisaki, Takahiro Kudo, Sawako Kato, Tatsuki Mizuochi, Hideki Kumagai, Mikihiro Inoue, Naomi Iwata, Takeshi Saito, Takashi Ishige, Toshifumi Yodoshi, Atsuko Noguchi, Shigeo Nishimata, Takahiro Mochizu
    Journal of Pediatric Gastroenterology and Nutrition.2025; 81(5): 1216.     CrossRef
  • Pharmacist-Led Shared Decision-Making in a Pediatric Patient with Crohn’s Disease and Growth Failure: A Case Report
    Momoko Konaka-Yamamoto, Ikkou Hirata, Maho Hamaguchi, Yuki Ohta, Ryohkan Funakoshi
    YAKUGAKU ZASSHI.2025; 145(10): 857.     CrossRef
  • Asian–Pacific perspectives on the management of very early-onset inflammatory bowel disease
    Ichiro Takeuchi, Katsuhiro Arai, Pornthep Tanpowpong, Ming-Wei Lai, Andrew S Day, Way Seah Lee, James Guoxian Huang, Karen Sophia Calixto-Mercado, Rosanna Ming Sum Wong, Muhammad Arshad Alvi, Zubin Grover, Jung Ok Shim, Ujjal Poddar
    Intestinal Research.2025; 23(4): 405.     CrossRef
  • Inflammatory Bowel Disease in Jordanian Children: A Tertiary Center Experience
    Hala Almomani, Ayah Alsmadi, Nicole Issi, Maria AlShurman, Eyad Altamimi
    Pediatric Gastroenterology, Hepatology & Nutrition.2025; 28(6): 393.     CrossRef
  • Utility of Small Bowel Capsule Endoscopy and Leucine-Rich Alpha-2-Glycoprotein in Pediatric Crohn’s Disease Management
    Satoshi Ukai, Shun Watanabe, Ayako Furuya, Tomomitsu Sado, Shingo Kurasawa, Atsuhiro Hirayama, Sawako Kato, Yoshiko Nakayama
    Cureus.2025;[Epub]     CrossRef
  • Prognosis of pediatric ulcerative colitis after infliximab failure: A multicenter registry‐based cohort study
    Ryusuke Nambu, Takahiro Kudo, Nao Tachibana, Hirotaka Shimizu, Tatsuki Mizuochi, Sawako Kato, Mikihiro Inoue, Hideki Kumagai, Takashi Ishige, Reiko Kunisaki, Atsuko Noguchi, Toshifumi Yodoshi, Shin‐Ichiro Hagiwara, Shigeo Nishimata, Fumihiko Kakuta, Takes
    Journal of Gastroenterology and Hepatology.2024; 39(2): 312.     CrossRef
  • Prevalence of Inflammatory Bowel Disease Unclassified, as Estimated Using the Revised Porto Criteria, among Korean Pediatric Patients with Inflammatory Bowel Disease
    Sung Hee Lee, Minsoo Shin, Seo Hee Kim, Seong Pyo Kim, Hyung-Jin Yoon, Yangsoon Park, Jaemoon Koh, Seak Hee Oh, Jae Sung Ko, Jin Soo Moon, Kyung Mo Kim
    Pediatric Gastroenterology, Hepatology & Nutrition.2024; 27(4): 206.     CrossRef
  • Clinical Efficacy and Future Application of Indigo Naturalis in the Treatment of Ulcerative colitis
    Dianzhen Wu, Qi Huang, Yingbi Xu, Ruiyi Cao, Ming Yang, Jin Xie, Dingkun Zhang
    Journal of Ethnopharmacology.2024; : 118782.     CrossRef
  • Validation of the simplified PIBD‐classes criteria: A single‐center retrospective study
    Yoshikazu Miura, Shin‐ichiro Hagiwara, Keinosuke Hizuka, Ryutaro Saura, Ayaha Hata, Takatoshi Maeyama, Yuri Etani
    Pediatrics International.2024;[Epub]     CrossRef
  • Comparison of Clinical Outcomes in Pediatric Patients with Ileocolonic Crohn Disease Treated with Infliximab Versus Adalimumab
    Eliana Fanous, Tal Marshanski, Noa Tal, Manar Matar, Yael Weintraub, Raanan Shamir, Dror S. Shouval
    Journal of Pediatric Gastroenterology and Nutrition.2023; 77(3): 358.     CrossRef
  • Caracterización clínica y terapéutica de una cohorte multicéntrica de pacientes con enfermedad inflamatoria intestinal en Colombia
    Viviana Parra-Izquierdo, Cristian Flórez Sarmiento, Juan Sebastián Frías-Ordoñez, Melquicedec Vargas, Joshua Kock, Natalia Lozano Escobar, Juan Ricardo Márquez
    Gastroenterología y Hepatología.2023; 46(8): 585.     CrossRef
  • Potential of Gut Microbe-Derived Extracellular Vesicles to Differentiate Inflammatory Bowel Disease Patients from Healthy Controls
    Min Heo, Young Soo Park, Hyuk Yoon, Nam-Eun Kim, Kangjin Kim, Cheol Min Shin, Nayoung Kim, Dong Ho Lee
    Gut and Liver.2023; 17(1): 108.     CrossRef
  • Medical management of pediatric inflammatory bowel disease in the Asia‐Pacific region: A position paper by the Asian Pan‐Pacific Society for Pediatric Gastroenterology, Hepatology, and Nutrition (APPSPGHAN) PIBD Working Group
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