1. Schroeder KW, Tremaine WJ, Ilstrup DM. Coated oral 5-aminosalicylic acid therapy for mildly to moderately active ulcerative colitis: a randomized study. N Engl J Med. 1987; 317:1625–1629.
2. Shah SC, Colombel JF, Sands BE, Narula N. Mucosal healing is associated with improved long-term outcomes of patients with ulcerative colitis: a systematic review and meta-analysis. Clin Gastroenterol Hepatol. 2016; 14:1245–1255.
3. Wright R, Truelove SR. Serial rectal biopsy in ulcerative colitis during the course of a controlled therapeutic trial of various diets. Am J Dig Dis. 1966; 11:847–857.
Article
4. Riley SA, Mani V, Goodman MJ, Dutt S, Herd ME. Microscopic activity in ulcerative colitis: what does it mean? Gut. 1991; 32:174–178.
5. Yoon H, Jangi S, Dulai PS, et al. Incremental benefit of achieving endoscopic and histologic remission in patients with ulcerative colitis: a systematic review and meta-analysis. Gastroenterology. 2020; 159:1262–1275.
6. Geboes K, Riddell R, Ost A, Jensfelt B, Persson T, Löfberg R. A reproducible grading scale for histological assessment of inflammation in ulcerative colitis. Gut. 2000; 47:404–409.
7. Mosli MH, Feagan BG, Zou G, et al. Development and validation of a histological index for UC. Gut. 2017; 66:50–58.
8. Marchal-Bressenot A, Salleron J, Boulagnon-Rombi C, et al. Development and validation of the Nancy histological index for UC. Gut. 2017; 66:43–49.
9. Ma C, Sedano R, Almradi A, et al. An international consensus to standardize integration of histopathology in ulcerative colitis clinical trials. Gastroenterology. 2021; 160:2291–2302.
10. Christensen B, Hanauer SB, Erlich J, et al. Histologic normalization occurs in ulcerative colitis and is associated with improved clinical outcomes. Clin Gastroenterol Hepatol. 2017; 15:1557–1564.
11. Shaffer SR, Erondu AI, Traboulsi C, et al. Achieving histologic normalization in ulcerative colitis is associated with a reduced risk of subsequent dysplasia. Inflamm Bowel Dis. 2022; 28:553–559.
12. Peyrin-Biroulet L, Sandborn W, Sands BE, et al. Selecting Therapeutic Targets in Inflammatory Bowel Disease (STRIDE): determining therapeutic goals for treat-to-target. Am J Gastroenterol. 2015; 110:1324–1338.
13. Colombel JF, Rutgeerts P, Reinisch W, et al. Early mucosal healing with infliximab is associated with improved long-term clinical outcomes in ulcerative colitis. Gastroenterology. 2011; 141:1194–1201.
14. Rutgeerts P, Sandborn WJ, Feagan BG, et al. Infliximab for induction and maintenance therapy for ulcerative colitis. N Engl J Med. 2005; 353:2462–2476.
15. Reinisch W, Sandborn WJ, Hommes DW, et al. Adalimumab for induction of clinical remission in moderately to severely active ulcerative colitis: results of a randomised controlled trial. Gut. 2011; 60:780–787.
16. Feagan BG, Rutgeerts P, Sands BE, et al. Vedolizumab as induction and maintenance therapy for ulcerative colitis. N Engl J Med. 2013; 369:699–710.
17. Sandborn WJ, Su C, Sands BE, et al. Tofacitinib as induction and maintenance therapy for ulcerative colitis. N Engl J Med. 2017; 376:1723–1736.
18. Sands BE, Sandborn WJ, Panaccione R, et al. Ustekinumab as induction and maintenance therapy for ulcerative colitis. N Engl J Med. 2019; 381:1201–1214.
19. Pai RK, Jairath V, Vande Casteele N, Rieder F, Parker CE, Lauwers GY. The emerging role of histologic disease activity assessment in ulcerative colitis. Gastrointest Endosc. 2018; 88:887–898.
20. Gupta A, Yu A, Peyrin-Biroulet L, Ananthakrishnan AN. Treat to target: the role of histologic healing in inflammatory bowel diseases: a systematic review and meta-analysis. Clin Gastroenterol Hepatol. 2021; 19:1800–1813.
21. Shehab M, Al Akram S, Hassan A, Alrashed F, Jairath V, Bessissow T. Histological disease activity as predictor of clinical relapse, hospitalization, and surgery in inflammatory bowel disease: systematic review and meta-analysis. Inflamm Bowel Dis. 2024; 30:563–572.
22. Colman RJ, Rubin DT. Histological inflammation increases the risk of colorectal neoplasia in ulcerative colitis: a systematic review. Intest Res. 2016; 14:202–210.
23. Rubin DT, Huo D, Kinnucan JA, et al. Inflammation is an independent risk factor for colonic neoplasia in patients with ulcerative colitis: a case-control study. Clin Gastroenterol Hepatol. 2013; 11:1601–1608.
24. Rutter M, Saunders B, Wilkinson K, et al. Severity of inflammation is a risk factor for colorectal neoplasia in ulcerative colitis. Gastroenterology. 2004; 126:451–459.
25. Choi CR, Al Bakir I, Ding NJ, et al. Cumulative burden of inflammation predicts colorectal neoplasia risk in ulcerative colitis: a large single-centre study. Gut. 2019; 68:414–422.
26. Yvellez OV, Rai V, Sossenheimer PH, et al. Cumulative histologic inflammation predicts colorectal neoplasia in ulcerative colitis: a validation study. Inflamm Bowel Dis. 2021; 27:203–206.
27. Turner D, Ricciuto A, Lewis A, et al. STRIDE-II: an update on the Selecting Therapeutic Targets in Inflammatory Bowel Disease (STRIDE) Initiative of the International Organization for the Study of IBD (IOIBD): determining therapeutic goals for treat-to-target strategies in IBD. Gastroenterology. 2021; 160:1570–1583.
28. Battat R, Duijvestein M, Guizzetti L, et al. Histologic healing rates of medical therapies for ulcerative colitis: a systematic review and meta-analysis of randomized controlled trials. Am J Gastroenterol. 2019; 114:733–745.
29. Mosli MH, Feagan BG, Sandborn WJ, et al. Histologic evaluation of ulcerative colitis: a systematic review of disease activity indices. Inflamm Bowel Dis. 2014; 20:564–575.
30. Magro F, Lopes J, Borralho P, et al. Comparing the continuous Geboes score with the Robarts histopathology index: definitions of histological remission and response and their relation to faecal calprotectin levels. J Crohns Colitis. 2020; 14:169–175.
31. Magro F, Lopes J, Borralho P, et al. Comparison of the Nancy index with continuous Geboes score: histological remission and response in ulcerative colitis. J Crohns Colitis. 2020; 14:1021–1025.
32. Magro F, Lopes J, Borralho P, et al. Comparison of different histological indexes in the assessment of UC activity and their accuracy regarding endoscopic outcomes and faecal calprotectin levels. Gut. 2019; 68:594–603.
33. Shah J, Dutta U, Das A, et al. Relationship between Mayo endoscopic score and histological scores in ulcerative colitis: a prospective study. JGH Open. 2019; 4:382–386.
34. Li K, Marano C, Zhang H, et al. Relationship between combined histologic and endoscopic endpoints and efficacy of ustekinumab treatment in patients with ulcerative colitis. Gastroenterology. 2020; 159:2052–2064.
35. Sandborn WJ, Feagan BG, Marano C, et al. Subcutaneous golimumab induces clinical response and remission in patients with moderate-to-severe ulcerative colitis. Gastroenterology. 2014; 146:85–95.
36. Sands BE, Sandborn WJ, Feagan BG, et al. Peficitinib, an oral Janus kinase inhibitor, in moderate-to-severe ulcerative colitis: results from a randomised, phase 2 study. J Crohns Colitis. 2018; 12:1158–1169.
37. Telesco SE, Brodmerkel C, Zhang H, et al. Gene expression signature for prediction of golimumab response in a phase 2a open-label trial of patients with ulcerative colitis. Gastroenterology. 2018; 155:1008–1011.
38. Li K, Strauss R, Marano C, et al. A simplified definition of histologic improvement in ulcerative colitis and its association with disease outcomes up to 30 weeks from initiation of therapy: post hoc analysis of three clinical trials. J Crohns Colitis. 2019; 13:1025–1035.
39. Danese S, Vermeire S, Zhou W, et al. Upadacitinib as induction and maintenance therapy for moderately to severely active ulcerative colitis: results from three phase 3, multicentre, double-blind, randomised trials. Lancet. 2022; 399:2113–2128.
40. Sandborn WJ, Feagan BG, D’Haens G, et al. Ozanimod as induction and maintenance therapy for ulcerative colitis. N Engl J Med. 2021; 385:1280–1291.
41. Magro F, Estevinho MM, Dias CC, et al. Clinical, endoscopic and histological outcomes in induction of moderate-to-severe ulcerative colitis: a systematic review with meta-analysis. J Crohns Colitis. 2021; 15:551–566.
42. Christensen B, Hanauer SB, Gibson PR, Turner JR, Hart J, Rubin DT. Segmental histological normalisation occurs in ulcerative colitis but does not improve clinical outcomes. J Crohns Colitis. 2020; 14:1345–1353.
43. Kaneshiro M, Takenaka K, Suzuki K, et al. Pancolonic endoscopic and histologic evaluation for relapse prediction in patients with ulcerative colitis in clinical remission. Aliment Pharmacol Ther. 2021; 53:900–907.
44. Doherty G, Katsanos KH, Burisch J, et al. European Crohn’s and Colitis Organisation topical review on treatment withdrawal [‘exit strategies’] in inflammatory bowel disease. J Crohns Colitis. 2018; 12:17–31.
45. Beaugerie L, Brousse N, Bouvier AM, et al. Lymphoproliferative disorders in patients receiving thiopurines for inflammatory bowel disease: a prospective observational cohort study. Lancet. 2009; 374:1617–1625.
46. Peyrin-Biroulet L, Khosrotehrani K, Carrat F, et al. Increased risk for nonmelanoma skin cancers in patients who receive thiopurines for inflammatory bowel disease. Gastroenterology. 2011; 141:1621–1628.
47. Lopez A, Mounier M, Bouvier AM, et al. Increased risk of acute myeloid leukemias and myelodysplastic syndromes in patients who received thiopurine treatment for inflammatory bowel disease. Clin Gastroenterol Hepatol. 2014; 12:1324–1329.
48. Wang Y, Parker CE, Feagan BG, MacDonald JK. Oral 5-aminosalicylic acid for maintenance of remission in ulcerative colitis. Cochrane Database Syst Rev. 2016; 2016–CD000544.
49. Bonovas S, Fiorino G, Lytras T, Nikolopoulos G, Peyrin-Biroulet L, Danese S. Systematic review with meta-analysis: use of 5-aminosalicylates and risk of colorectal neoplasia in patients with inflammatory bowel disease. Aliment Pharmacol Ther. 2017; 45:1179–1192.
50. Little DH, Tabatabavakili S, Shaffer SR, Nguyen GC, Weizman AV, Targownik LE. Effectiveness of dose de-escalation of biologic therapy in inflammatory bowel disease: a systematic review. Am J Gastroenterol. 2020; 115:1768–1774.
51. Zhang B, Gulati A, Alipour O, Shao L. Relapse from deep remission after therapeutic de-escalation in inflammatory bowel disease: a systematic review and meta-analysis. J Crohns Colitis. 2020; 14:1413–1423.
52. Kobayashi T, Motoya S, Nakamura S, et al. Discontinuation of infliximab in patients with ulcerative colitis in remission (HAYABUSA): a multicentre, open-label, randomised controlled trial. Lancet Gastroenterol Hepatol. 2021; 6:429–437.
53. Martin A, Nachury M, Peyrin-Biroulet L, et al. Maintenance of remission among patients with inflammatory bowel disease after vedolizumab discontinuation: a multicentre cohort study. J Crohns Colitis. 2020; 14:896–903.
54. Panés J, Vermeire S, Dubinsky MC, et al. Efficacy and safety of tofacitinib re-treatment for ulcerative colitis after treatment interruption: results from the OCTAVE clinical trials. J Crohns Colitis. 2021; 15:1852–1863.
55. Vermeire S, Feagan BG, Peyrin-Biroulet L, et al. Withdrawal and re-treatment with filgotinib in ulcerative colitis: post hoc analyses of the phase 2b/3 SELECTION and SELECTIONLTE studies. J Crohns Colitis. 2024; 18:54–64.
56. Zenlea T, Yee EU, Rosenberg L, et al. Histology grade is independently associated with relapse risk in patients with ulcerative colitis in clinical remission: a prospective study. Am J Gastroenterol. 2016; 111:685–690.
57. Bryant RV, Burger DC, Delo J, et al. Beyond endoscopic mucosal healing in UC: histological remission better predicts corticosteroid use and hospitalisation over 6 years of follow-up. Gut. 2016; 65:408–414.
58. Mikolajczyk AE, Cohen NA, Watson S, et al. Assessment of the degree of variation of histologic inflammation in ulcerative colitis. Inflamm Bowel Dis. 2023; 29:222–227.
59. Peyrin-Biroulet L, Rubin D, Weber C, et al. Deployment of an artificial intelligence tool for precision medicine in ulcerative colitis: preliminary data from 8 globally distributed clinical sites. J Crohns Colitis. 2023; 17(Suppl 1):i910–i911.