https://www.topclass-ibd.com/articles-events daily 0.75 2026-02-22 https://www.topclass-ibd.com/articles-events/defining-radiological-healing-in-perianal-fistulising-crohns-disease monthly 0.5 2026-02-03 https://www.topclass-ibd.com/articles-events/perianal-fistulising-crohns-disease-associated-anorectal-and-fistula-cancers-systematic-review-and-expert-consensus monthly 0.5 2026-02-03 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/a02c44cd-805e-43b5-a669-2732c7d1eaac/getty-images-SJ8eFo7ttvE-unsplash.jpg Publications and Events - Perianal Fistulising Crohn’s Disease – Associated anorectal and fistula cancers: Systematic Review and Expert Consensus  https://www.topclass-ibd.com/articles-events/topclass-consortium-meeting-at-ecco-2026 monthly 0.5 2026-02-22 https://www.topclass-ibd.com/articles-events/category/Publications monthly 0.5 https://www.topclass-ibd.com/articles-events/category/Upcoming+Events monthly 0.5 https://www.topclass-ibd.com/articles-events/category/Research monthly 0.5 https://www.topclass-ibd.com/articles-events/category/Press monthly 0.5 https://www.topclass-ibd.com/articles-events/tag/Pierre+Example monthly 0.5 https://www.topclass-ibd.com/articles-events/tag/The+Proctology+Department+at+H%C3%B4pital+Paris+Saint-Joseph monthly 0.5 https://www.topclass-ibd.com/articles-events/tag/Pooja+Datt monthly 0.5 https://www.topclass-ibd.com/researchers daily 0.75 2026-03-03 https://www.topclass-ibd.com/researchers/pierre-example monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/0863880c-9fc6-468d-87e5-435400dc44aa/Ailsa-Hart+pic.jpg Researchers - Professor Ailsa Hart https://www.topclass-ibd.com/researchers/phil-tozer monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/4ff0e52d-62c2-4367-80ed-506b485eb591/Phil+Tozer01.webp Researchers - Phil Tozer https://www.topclass-ibd.com/researchers/luke-hanna monthly 0.5 2026-02-22 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/e2b18cbe-6968-4054-add2-25471b85fb25/Luke.jpg Researchers - Luke Hanna BSc(Hons) MBBS MRCP) https://www.topclass-ibd.com/researchers/kingaskowron-olortegui-md monthly 0.5 2026-03-03 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1772521227643-2NG9DD8U23GHEN6NRMA8/Kinga%C2%A0Skowron%2BOlortegui%2C%2BMD01.webp Researchers - Kinga Skowron Olortegui, MD https://www.topclass-ibd.com/researchers/dr-amelia-kellar monthly 0.5 2026-03-03 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1772521215210-TV83JQBNDVWOK28MCU6N/Lightner%2BLab%2Bat%2BCalibr%2BSkaggs%2Bin%2BSan%2BDiego%252C%2BUS10.webp Researchers - Dr Amelia Kellar  https://www.topclass-ibd.com/researchers/dr-nuru-noor monthly 0.5 2026-02-22 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/218497a3-61ee-4541-bd03-800e7c98ca58/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US12.webp Researchers - Dr Nuru Noor https://www.topclass-ibd.com/researchers/dr-astrid-williams monthly 0.5 2026-03-03 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/a1024ac8-b3cf-42aa-97d1-ea9dc830462c/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US11.webp Researchers - Dr Astrid Williams https://www.topclass-ibd.com/researchers/dr-siyan-stewart-cao monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/d5be3af8-b0f2-4b7e-ab1d-bcb8433dfc06/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US09.webp Researchers - Dr. Siyan “Stewart” Cao https://www.topclass-ibd.com/researchers/david-ballard-md monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/fe886414-6b31-43ea-825e-bd33dcb3b5a4/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US08.webp Researchers - David Ballard, MD, https://www.topclass-ibd.com/researchers/parakkal-deepak-mbbs-ms-facg monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/36af62b7-eab1-4e87-a64e-b818f38d36d7/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US07.webp Researchers - Parakkal Deepak MBBS, MS, FACG https://www.topclass-ibd.com/researchers/dr-sara-el-ouali monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/4400c3cb-2e43-45ee-9d6a-a79816a80112/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US06.webp Researchers - Dr. Sara El Ouali https://www.topclass-ibd.com/researchers/dr-isabelle-de-kock monthly 0.5 2026-03-03 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/6c91d85d-6634-4340-ab2c-083f1f9d52fd/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US05.webp Researchers - Dr Isabelle De Kock https://www.topclass-ibd.com/researchers/amy-l-lightner-md-mba monthly 0.5 2026-03-03 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1772521369356-HL3N89916YQDA0KVG16Q/Lightner%2BLab%2Bat%2BCalibr%2BSkaggs%2Bin%2BSan%2BDiego%252C%2BUS04.webp Researchers - Amy L. Lightner MD MBA https://www.topclass-ibd.com/researchers/shivani-joshi monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/7bd670ea-6bd5-4aaa-95ec-07a11ed3365c/Shiv.webp Researchers - Shivani Joshi https://www.topclass-ibd.com/researchers/theo-pelly monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/3eb9faa4-ad82-467f-8694-0e3a1625070b/Theo.jpg Researchers - Theo Pelly https://www.topclass-ibd.com/researchers/eathar-shakweh monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/8787f8fe-ec98-4251-8876-746ec5184be2/Eathar.webp Researchers - Eathar Shakweh https://www.topclass-ibd.com/researchers/pooja-datt monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/db937d3a-6a8b-469d-8251-225bd013faf4/20240517055411.jpg Researchers - Pooja Datt https://www.topclass-ibd.com/researchers/reshma-kanani monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/60ed3edf-e5d6-498f-be7b-e41498914ee8/Reshma.jpg Researchers - Reshma Kanani https://www.topclass-ibd.com/researchers/category/Canada monthly 0.5 https://www.topclass-ibd.com/researchers/category/United+States monthly 0.5 https://www.topclass-ibd.com/researchers/category/Europe monthly 0.5 https://www.topclass-ibd.com/researchers/category/United+Kingdom monthly 0.5 https://www.topclass-ibd.com/researchers/tag/Cleveland+Clinic+Abu+Dhabi monthly 0.5 https://www.topclass-ibd.com/researchers/tag/The+Fistula+Research+Unit+at+St.+Mark%E2%80%99s+Hospital monthly 0.5 https://www.topclass-ibd.com/researchers/tag/St+Louis+USA monthly 0.5 https://www.topclass-ibd.com/researchers/tag/Lightner+Lab+San+Diego monthly 0.5 https://www.topclass-ibd.com/researchers/tag/University+of+British+Columbia+Vancouver+Canada monthly 0.5 https://www.topclass-ibd.com/researchers/tag/Cambridge monthly 0.5 https://www.topclass-ibd.com/researchers/tag/Icahn+School+University+Hospital+of+Ghent monthly 0.5 https://www.topclass-ibd.com/researchers/tag/University+of+Chicago+USA monthly 0.5 https://www.topclass-ibd.com/consortium-members daily 0.75 2026-04-28 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/21e8a1a2-c784-4a7b-a893-3bee8ad041aa/White_Gradient.png https://www.topclass-ibd.com/consortium-members/the-fistula-research-unit-at-st-marks-hospital-london-united-kingdom monthly 0.5 2026-02-22 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1747049656512-RZB11NABCFW7XLL71164/Topclass0000.jpg Consortium Members - The Fistula Research Unit at St. Mark’s Hospital - Make it stand out From left to right (front row): Pooja Datt (Research Manager), Phil Lung (Consultant Radiologist), Ailsa Hart (Consultant Gastroenterologist), James Alexander (Consultant Gastroenterologist), Eathar Shakweh (Research Fellow), Shivani Joshi (Research Fellow) From left to right (back row): Reshma Kanani (Tissue Bank Project Lead), Luke Hanna (Research Fellow), Phil Tozer (Consultant Colorectal Surgeon), Theo Pelly (Research Fellow), Easan Anand (Research Fellow) https://www.topclass-ibd.com/consortium-members/lightner-lab-at-calibr-skaggs-in-san-diego-us-mk47z-j2wap-hbkwk-c7rex monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1770644253975-74PLUKEK4MW8MCKAS68B/university-of-chicago-medicine.jpg Consortium Members - University of Chicago Medical Center, Chicago, U.S.A  - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/lightner-lab-at-calibr-skaggs-in-san-diego-us-mk47z-j2wap-hbkwk monthly 0.5 2026-02-27 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/265b78f7-24c1-4452-8000-008486766ae6/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US11.webp Consortium Members - University of British Columbia, Vancouver, Canada  - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/lightner-lab-at-calibr-skaggs-in-san-diego-us-mk47z-j2wap monthly 0.5 2026-02-27 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1770131944973-80R4FIRC7LVL4NIAHD76/Dr+Nuru+Noor Consortium Members - Cambridge University Hospitals NHS Foundation Trust - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/lightner-lab-at-calibr-skaggs-in-san-diego-us-mk47z monthly 0.5 2026-02-27 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1770637060808-97J71QVAS7RM9SX9TFGL/Cleveland_Clinic_Abu_Dhabi_%28210372013%29_crop.jpg Consortium Members - Cleveland Clinic, Abu Dhabi - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/nottingham-fistula-research-group-nottingham-united-kingdom monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/0ce84c58-eff7-41a6-9a86-9b87072377fe/Nottingham.png Consortium Members - Nottingham Fistula Research Group - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/the-proctology-department-at-hpital-paris-saint-joseph-paris-france monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/92789cf4-b073-458f-94d7-9ab1e08bcfd9/Equipe-2024-scaled.jpg Consortium Members - The Proctology Department at Hôpital Paris Saint-Joseph - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/icahn-school-of-medicine-at-mount-sinai-new-york-usa-hwead monthly 0.5 2026-02-22 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/09b66a4e-f3e6-435b-bc75-cb0cbb7add3e/IMG_9168-cropped-1.png Consortium Members - Icahn School University Hospital of Ghent - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/icahn-school-of-medicine-at-mount-sinai-new-york-usa monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1b8e0167-c0eb-4099-964e-e5e491892120/Mount-Sinai-perianal-clinic-photo-20230831.jpg Consortium Members - Icahn School of Medicine at Mount Sinai - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/ibd-leuven-fistula-research-unit-leuven-belgium monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1e20eace-5205-4d60-ba7d-8fc49fe0ea62/Leuven.png Consortium Members - IBD Leuven Fistula Research Unit - Make it stand out From left to right 1st row: Karen Van Hoeve (paediatrician), Ilse Hoffman (paediatrician), Séverine Vermeire (gastroenterologist), André D’Hoore (colorectal surgeon). From left to right 2nd row: Bram Verstockt (gastroenterologist), João Sabino (gastroenterologist), Gabriele Bislenghi (colorectal surgeon), Marc Ferrante (gastroenterologist), Dirk Vanbeckevoort (abdominal radiologist). https://www.topclass-ibd.com/consortium-members/the-fistula-research-unit-at-st-marks-hospital monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/8d7b256c-fb19-42df-b052-a866db5461bc/Washington.jpg Consortium Members - Washington University School of Medicine in St. Louis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/st-vincents-hospital-melbourne-fistula-research-group monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/fd6bd480-f72b-4ec4-9c7b-50de7c6e253f/St+Vincent%60s+Hospital+Melbourne01.jpeg Consortium Members - St Vincent's Hospital Melbourne Fistula Research Group - Make it stand out From left to right: A/Prof Ding, Dr Winata, Dr Behrenbruch, Dr De Gregorio, Dr Hartley https://www.topclass-ibd.com/consortium-members/lightner-lab-at-calibr-skaggs-in-san-diego-us monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/4510335a-9cd1-4ba4-9def-7be74da81d0f/Lightner+Lab+at+Calibr+Skaggs+in+San+Diego%2C+US01.webp Consortium Members - Lightner Lab at Calibr Skaggs in San Diego, US - Make it stand out From left to right: Eleadah Vidales (Research Assistant), Sophia Carpinelli (Research Assistant), Krittikorn Kumpornsin, PhD (Staff Scientist), Dr. Mazer Ally, MD (Gastroenterologist and Clinical Assistant Professor of Medicine), Dr. Amy Lightner, MD (Colorectal surgeon and Professor of Molecular and Cellular Biology and Professor of Immunology), Zack Sitte, PhD (Staff Scientist), Melissa J Ferrari (PA-C, MPAS), Safa Baqi (Research Assistant), Madison Folsom (PA-C, Physician Assistant), Kayla Garcia (Medical Assistant) https://www.topclass-ibd.com/consortium-members/icahn-schooluniversity-hospital-of-ghent-ghent-belgium monthly 0.5 2026-02-27 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/41777ced-ad37-45e2-9826-1bdcddc71c68/Santa-cruz-hospital.jpg Consortium Members - The IBD Unit at Santa Cruz Hospital - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/consortium-members/category/South+America monthly 0.5 https://www.topclass-ibd.com/consortium-members/category/Middle+East monthly 0.5 https://www.topclass-ibd.com/consortium-members/category/Europe monthly 0.5 https://www.topclass-ibd.com/consortium-members/category/America monthly 0.5 https://www.topclass-ibd.com/consortium-members/category/Brazil monthly 0.5 https://www.topclass-ibd.com/consortium-members/category/United+Kingdom monthly 0.5 https://www.topclass-ibd.com/consortium-members/category/Australia monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/University+of+Chicago monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/Icahn+SchoolUniversity+Hospital+of+Ghent monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/The+Proctology+Department+at+H%C3%B4pital+Paris+Saint-Joseph monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/Cambridge monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/IBD+Leuven+Fistula+Research+Unit monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/Washington monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/Cleveland+Clinic+Abu+Dhabi monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/IBD+Unit+S%C3%A3o+Paulo monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/St+Vincent%27s+Hospital+Melbourne monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/The+Fistula+Research+Unit+at+St.+Mark%E2%80%99s+Hospital monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/Lightner+Lab monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/Icahn+School+of+Medicine+at+Mount+Sinai monthly 0.5 https://www.topclass-ibd.com/consortium-members/tag/Vancouver+Canada monthly 0.5 https://www.topclass-ibd.com/projects daily 0.75 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/21e8a1a2-c784-4a7b-a893-3bee8ad041aa/White_Gradient.png https://www.topclass-ibd.com/projects/demo-proect-7t2ns monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/da466f62-3c64-4b99-a963-a610d47111fa/Figure-1-scaled.jpg Projects - Classification - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/b5dbb8ca-bd11-433b-ac76-a4de7e3f3a12/insert+figure+%28ref+CGH%29+of+down-staging01.webp Projects - Classification - Make it stand out Figure: A case of anatomical rationalization and fistula downstaging from Class 2b to 2a. (A), Active intersphincteric horseshoe extension at presentation; (B), Healed (fibrosed) horseshoe following intensive VAAFT; (C), Main fistula tract at presentation; (D), Main tract with reduced but ongoing activity following VAAFT; (E), Radiological healing (fibrosis) of main tract following definitive surgical repair. https://www.topclass-ibd.com/projects/optimising-treatment monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/b5dbb8ca-bd11-433b-ac76-a4de7e3f3a12/insert+figure+%28ref+CGH%29+of+down-staging01.webp Projects - Optimising Treatment - Make it stand out Figure: A case of anatomical rationalization and fistula downstaging from Class 2b to 2a. (A), Active intersphincteric horseshoe extension at presentation; (B), Healed (fibrosed) horseshoe following intensive VAAFT; (C), Main fistula tract at presentation; (D), Main tract with reduced but ongoing activity following VAAFT; (E), Radiological healing (fibrosis) of main tract following definitive surgical repair. https://www.topclass-ibd.com/projects/priority-setting-partnership monthly 0.5 2026-02-09 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1a103336-55ad-4b30-9165-1a858ddee79f/galina-nelyubova-rUProxh-uso-unsplash.jpg Projects - Priority Setting Partnership - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.topclass-ibd.com/projects/category/Project+C monthly 0.5 https://www.topclass-ibd.com/projects/category/Project+A monthly 0.5 https://www.topclass-ibd.com/projects/category/Project+B monthly 0.5 https://www.topclass-ibd.com/projects/tag/Proctology+Department+at+H%C3%B4pital+Paris+Saint-Joseph monthly 0.5 https://www.topclass-ibd.com/home daily 1.0 2026-04-28 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/18c09e8c-f86b-45b1-b1f0-a72851ccd5d7/IMG_9688+72dpi_rgb_J9_1800x1200_online.jpg https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/94746a14-b7da-42ed-8e60-edcb6dd3fee0/850_7498-Q90-3000px-scaled.jpg https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/28b06b4c-6707-42e8-afab-d15b45e87ee2/helmsley-charitable-trust-logo-white.png https://www.topclass-ibd.com/about daily 0.75 2026-04-28 https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/3a5b8f92-82c2-4561-aaf2-4106a3dd5c48/IMG_6828+72dpi_rgb_J9_1800x1200_online.jpg https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/1744200479145-VLU3TPKSGF1905216YT1/national-institute-of-allergy-and-infectious-diseases-ZpxdWhLnU0g-unsplash.jpg https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/b5aca41c-d120-42d5-935d-d1d4269ec3df/phil+tozer+surgery+960px+Q80.jpg https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/ad2ab3bc-442c-4631-8e54-4d8c6fc08cdc/850_7500+Q90+3000px.jpg https://images.squarespace-cdn.com/content/v1/67f637df7e5b57250a818d5f/28b06b4c-6707-42e8-afab-d15b45e87ee2/helmsley-charitable-trust-logo-white.png