Faculty profile
Robert Riddell
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Read how they describe their research on their University of Toronto profile.
Latest papers
Variability in morphology and immunohistochemistry of Crohn's disease-associated small bowel neoplasms: implications of Claudin 18 and Cadherin 17 expression for tumor-targeted immunotherapies.
Virchows Archiv : an international journal of pathology · 2025
Interim Analysis of a Trial Evaluating the Utility of Non-Targeted Biopsies for Colorectal Neoplasia Detection in Inflammatory Bowel Disease
Clinical Gastroenterology and Hepatology · 2024
Reply
Clinical Gastroenterology and Hepatology · 2022
Latest funding
- $650,249
A Randomized Controlled Non-Inferiority Trial to Assess the Utility of Non-Targeted Biopsies for Colorectal Neoplasia Detection in Adult Inflammatory Bowel Disease
CIHR · 2022 · Co-investigator
- $298,351
A Randomized, Parallel-Group, Open Label, Non-Inferiority, Pragmatic Trial Comparing Random AND Targeted Biopsies to Targeted Biopsies Alone for Neoplasia Detection During Screening Colonoscopy in Adult Persons with Colonic Inflammatory Bowel Diseases: A Pilot Study
CIHR · 2018 · Co-investigator
22 publications.
Variability in morphology and immunohistochemistry of Crohn's disease-associated small bowel neoplasms: implications of Claudin 18 and Cadherin 17 expression for tumor-targeted immunotherapies.
Iwaya M, Kodama M, Abe K, Maeda K, Nakajima T, Uehara T, Nishio R, Yamana T, Riddell R, Ota H
Interim Analysis of a Trial Evaluating the Utility of Non-Targeted Biopsies for Colorectal Neoplasia Detection in Inflammatory Bowel Disease
Murthy SK, Bernstein CN, Nguyen GC, Jairath V, Riddell R, Fergusson D, Consortium CIR, Conner J, Ramsay T, Castelli JM
Reply
Wong ECL, Colombel J-F, Riddell R, Marshall JK, Reinisch W, Dulai PS, Narula N
Active Margins, Plexitis, and Granulomas Increase Postoperative Crohn’s Recurrence: Systematic Review and Meta-analysis
Tandon P, Malhi G, Abdali D, Pogue E, Marshall JK, de Buck van Overstraeten A, Riddell R, Narula N
Early Change in Epithelial Neutrophilic Infiltrate Predicts Long-Term Response to Biologics in Ulcerative Colitis
Neeraj Narula, Emily C L Wong, Jean–Frédéric Colombel, Robert H. Riddell, John Kenneth Marshall, Walter Reinisch, Parambir Singh Dulai
Validation of the 'Inflammatory Bowel Disease-Distribution, Chronicity, Activity [IBD-DCA] Score' for Ulcerative Colitis and Crohn´s Disease.
Lang-Schwarz C, Angeloni M, Agaimy A, Atreya R, Becker C, Dregelies T, Danese S, Fléjou JF, Gaßler N, Grabsch HI, Hartmann A, Kamarádová K, Kühl AA, Lauwers GY, Lugli A, Nagtegaal I, Neurath MF, Oberhuber G, Peyrin-Biroulet L, Rath T, Riddell R, Rubio CA, Sheahan K, Siegmund B, Tilg H, Villanacci V, Westerhoff M, Ferrazzi F, Vieth M
Most colitis associated carcinomas lack expression of LGR5: a preliminary study with implications for unique pathways of carcinogenesis compared to sporadic colorectal carcinoma.
Iwaya M, Ota H, Nakajima T, Uehara T, Riddell R, Conner J
Maximizing the diagnostic information from biopsies in chronic inflammatory bowel diseases: recommendations from the Erlangen International Consensus Conference on Inflammatory Bowel Diseases and presentation of the IBD-DCA score as a proposal for a new index for histologic activity assessment in ulcerative colitis and Crohn's disease.
Lang-Schwarz C, Agaimy A, Atreya R, Becker C, Danese S, Fléjou JF, Gaßler N, Grabsch HI, Hartmann A, Kamarádová K, Kühl AA, Lauwers GY, Lugli A, Nagtegaal I, Neurath MF, Oberhuber G, Peyrin-Biroulet L, Rath T, Riddell R, Rubio CA, Sheahan K, Tilg H, Villanacci V, Westerhoff M, Vieth M
Impact of Referral Center Pathology Review on Diagnosis and Management of Patients With Appendiceal Neoplasms.
Jedrzkiewicz J, Tateishi Y, Kirsch R, Conner J, Bischof D, McCart A, Riddell R, Pollett A, Taylor EL, Govindarajan A
Histological Markers of Clinical Relapse in Endoscopically Quiescent Ulcerative Colitis.
Kevans D, Kirsch R, Dargavel C, Kabakchiev B, Riddell R, Silverberg MS
A Randomized Controlled Non-Inferiority Trial to Assess the Utility of Non-Targeted Biopsies for Colorectal Neoplasia Detection in Adult Inflammatory Bowel Disease
Principal investigators: Murthy, Sanjay K; Fergusson, Dean A
Keywords: Colonoscopy; Colorectal Cancer Screening; Crohn'S Disease; Inflammatory Bowel Disease; Interventional Study; Non-Inferiority Trial; Practice Utility; Randomized Controlled Trial; Tissue Sampling; Ulcerative Colitis
A Randomized, Parallel-Group, Open Label, Non-Inferiority, Pragmatic Trial Comparing Random AND Targeted Biopsies to Targeted Biopsies Alone for Neoplasia Detection During Screening Colonoscopy in Adult Persons with Colonic Inflammatory Bowel Diseases: A Pilot Study
Principal investigators: Murthy, Sanjay K; Fergusson, Dean A
Keywords: Colorectal Cancer; Dysplasia; Endoscopy; Inflammatory Bowel Diseases; Randomized Controlled Trial; Screening
From public funding decisions: CIHR since 2008, NSERC since 1991 and SSHRC since 1998 with their latest competition results, the Canada Foundation for Innovation, Genome Canada, the Canadian Space Agency, Canada Research Chairs, the Fonds de recherche du Québec, Ontario research funding, Michael Smith Health Research BC, the Canadian Cancer Society, Heart & Stroke and Brain Canada.
Frequent collaborators
- Guangyong Zou and GY Zou: 376 shared papers
- Neeraj Narula and John Marshall: 164 shared papers
- Neeraj Narula and Vipul Jairath: 88 shared papers
- Vipul Jairath and Guangyong Zou: 87 shared papers
- Vipul Jairath and GY Zou: 84 shared papers
- Geoffrey Nguyen and Charles Bernstein: 68 shared papers
- Reena Khanna and Vipul Jairath: 58 shared papers
- Reena Khanna and Guangyong Zou: 52 shared papers
- Reena Khanna and GY Zou: 52 shared papers
- Dean Fergusson and John Marshall: 50 shared papers
- Charles Bernstein and John Marshall: 49 shared papers
- Geoffrey Nguyen and John Marshall: 16 shared papers
- Neeraj Narula and Geoffrey Nguyen: 15 shared papers
- Reena Khanna and Charles Bernstein: 10 shared papers
- Anand Govindarajan and Danielle Bischof: 5 shared papers
- Anand Govindarajan and Andrea McCart: 5 shared papers
- David Driman and Richard Kirsch: 5 shared papers
- James Conner and Richard Kirsch: 5 shared papers
- Danielle Bischof and Andrea McCart: 5 shared papers
- Neeraj Narula and Robert Riddell: 4 shared papers
- Dean Fergusson and Geoffrey Nguyen: 4 shared papers
- Dean Fergusson and Charles Bernstein: 4 shared papers
- Robert Riddell and Richard Kirsch: 4 shared papers
- John Marshall and Robert Riddell: 3 shared papers
- Vipul Jairath and David Driman: 3 shared papers
- Diponkar Banerjee and Jagdish Butany: 3 shared papers
- Richard Kirsch and Zane Cohen: 3 shared papers
- Neeraj Narula and Daniyal Abdali: 2 shared papers
- Reena Khanna and David Driman: 2 shared papers
- Reena Khanna and Robert Riddell: 2 shared papers
- Geoffrey Nguyen and Zane Cohen: 2 shared papers
- Anand Govindarajan and Richard Kirsch: 2 shared papers
- Aaron Pollett and David Driman: 2 shared papers
- Aaron Pollett and Robert Riddell: 2 shared papers
- Aaron Pollett and Richard Kirsch: 2 shared papers
- Aaron Pollett and Zane Cohen: 2 shared papers
- Vipul Jairath and Robert Riddell: 2 shared papers
- Guangyong Zou and Robert Riddell: 2 shared papers
- Jagdish Butany and Robert Riddell: 2 shared papers
- GY Zou and Robert Riddell: 2 shared papers
- David Driman and Robert Riddell: 2 shared papers
- James Conner and Robert Riddell: 2 shared papers
- Robert Riddell and Zane Cohen: 2 shared papers
- Neeraj Narula and Elahn Peter Lloyd Pogue: 1 shared paper
- Catherine Ross and Jagdish Butany: 1 shared paper
- Catherine Ross and Robert Riddell: 1 shared paper
- Catherine Ross and Christian Couture: 1 shared paper
- Elahn Peter Lloyd Pogue and Daniyal Abdali: 1 shared paper
- Elahn Peter Lloyd Pogue and John Marshall: 1 shared paper
- Elahn Peter Lloyd Pogue and Robert Riddell: 1 shared paper
- Daniyal Abdali and John Marshall: 1 shared paper
- Daniyal Abdali and Robert Riddell: 1 shared paper
- Dean Fergusson and Robert Riddell: 1 shared paper
- Geoffrey Nguyen and Robert Riddell: 1 shared paper
- Charles Bernstein and Robert Riddell: 1 shared paper
- Anand Govindarajan and James Conner: 1 shared paper
- Anand Govindarajan and Robert Riddell: 1 shared paper
- Aaron Pollett and Danielle Bischof: 1 shared paper
- Aaron Pollett and Andrea McCart: 1 shared paper
- Diponkar Banerjee and Robert Riddell: 1 shared paper
- Diponkar Banerjee and Bayardo Perez-Ordonez: 1 shared paper
- Jagdish Butany and Bayardo Perez-Ordonez: 1 shared paper
- Jagdish Butany and Christian Couture: 1 shared paper
- Robert Riddell and Bayardo Perez-Ordonez: 1 shared paper
- Robert Riddell and Danielle Bischof: 1 shared paper
- Robert Riddell and Andrea McCart: 1 shared paper
- Robert Riddell and Christian Couture: 1 shared paper
- Department of Laboratory Medicine & Pathobiology
- Department of Medicine
- Department of Surgery
- Department for the Study of Religion
- Department of Pathology and Laboratory Medicine
- Department of Epidemiology and Biostatistics
- Epidemiology and Biostatistics
- Other
Co-authors at University of Toronto, colored by department. Thicker lines mean more shared papers; select anyone to open their profile and their own map.
Richard Kirsch
Department of Laboratory Medicine & Pathobiology
4 shared papers, latest 2020
Neeraj Narula
Department of Medicine
4 shared papers, latest 2024
John Marshall
Department for the Study of Religion
3 shared papers, latest 2022
Zane Cohen
Department of Surgery
2 shared papers, latest 2019
GY Zou
Department of Epidemiology and Biostatistics
2 shared papers, latest 2017
David Driman
Department of Pathology and Laboratory Medicine
2 shared papers, latest 2017
Aaron Pollett
Department of Laboratory Medicine & Pathobiology
2 shared papers, latest 2020
Vipul Jairath
Medicine
2 shared papers, latest 2024
Guangyong Zou
Epidemiology and Biostatistics
2 shared papers, latest 2017
Reena Khanna
Department of Medicine
2 shared papers, latest 2017
James Conner
Department of Laboratory Medicine & Pathobiology
2 shared papers, latest 2021
Jagdish Butany
Department of Laboratory Medicine & Pathobiology
2 shared papers, latest 2019
Parul Tandon
Department of Medicine
1 shared papers, latest 2021
Danielle Bischof
Department of Surgery
1 shared papers, latest 2020
Bayardo Perez-Ordonez
Department of Laboratory Medicine & Pathobiology
1 shared papers, latest 2014
Andrea McCart
Department of Surgery
1 shared papers, latest 2020
Ming Tsao
Department of Medical Biophysics
1 shared papers, latest 2019
Christian Couture
Médecine
1 shared papers, latest 2019
Pablo Serrano Aybar
Department of Surgery
1 shared papers, latest 2015
Steven Gallinger
Department of Surgery
1 shared papers, latest 2015
Talat Bessissow
Department of Medicine
1 shared papers, latest 2024
Diponkar Banerjee
Pathology and Laboratory Medicine
1 shared papers, latest 2014
Pierre Fiset
Department of Anesthesia
1 shared papers, latest 2019
Michael Mengel
Laboratory Medicine & Pathology Dept
1 shared papers, latest 2014
Scott Boerner
Department of Laboratory Medicine & Pathobiology
1 shared papers, latest 2019
Sanjay Murthy
Department of Medicine
1 shared papers, latest 2024
Catherine Ross
Department of Pathology and Molecular Medicine
1 shared papers, latest 2019
Elahn Peter Lloyd Pogue
Department of Medicine
1 shared papers, latest 2021
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Profile data last refreshed on September 29, 2026 from the university directory, publication records and public research funding records.