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Introduction: Patients with ulcerative colitis (UC) receiving immunosuppressive drugs are at substantial risk of colectomy. We aimed to assess the risk of postoperative complications of tofacitinib exposure before colectomy in comparison with biologics., Methods: A multicenter, retrospective, observational study was conducted in patients with UC who underwent total colectomy for medically refractory disease, exposed to tofacitinib or a biologic before surgery. Primary outcome was the occurrence of any complication within 30 (early) and 90 (late) days after surgery. Secondary outcomes were the occurrence of infections, sepsis, surgical site complications, venous thromboembolic events (VTE), hospital readmissions, and redo surgery within the same timepoints., Results: Three hundred one patients (64 tofacitinib, 162 anti-tumor necrosis factor-α agents, 54 vedolizumab, and 21 ustekinumab) were included. No significant differences were reported in any outcome, except for a higher rate of early VTE with anti-tumor necrosis factor-α agents ( P = 0.047) and of late VTE with vedolizumab ( P = 0.03). In the multivariate analysis, drug class was not associated with a higher risk of any early and late complications. Urgent colectomy increased the risk of any early (odds ratio [OR] 1.92, 95% confidence interval [CI] 1.06-3.48) complications, early hospital readmission (OR 4.79, 95% CI 1.12-20.58), and early redo surgery (OR 7.49, 95% CI 1.17-47.85). A high steroid dose increased the risk of any early complications (OR 1.96, 95% CI 1.08-3.57), early surgical site complications (OR 2.03, 95% CI 1.01-4.09), and early redo surgery (OR 7.52, 95% CI 1.42-39.82). Laparoscopic surgery decreased the risk of any early complications (OR 0.54, 95% CI 0.29-1.00), early infections (OR 0.39, 95% CI 0.18-0.85), and late hospital readmissions (OR 0.34, 95% CI 0.12-1.00)., Discussion: Preoperative tofacitinib treatment demonstrated a postoperative safety profile comparable with biologics in patients with UC undergoing colectomy., (Copyright © 2024 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of The American College of Gastroenterology.)

Background: The administration of biological drugs in inflammatory bowel diseases (IBD) is increasingly moving from intravenous to subcutaneous formulations., Aims: To evaluate the efficacy and safety of vedolizumab subcutaneous administration after switching from intravenous administration in ulcerative colitis (UC) patients in corticosteroid-free clinical remission., Methods: An observational, multicentre, prospective study was conducted by the Italian Group for the study of IBD (IG-IBD). UC patients in clinical remission (pMAYO < 2) not receiving steroids for > 8 months before the switch, and with at least 6 months of follow-up were included. Switch from intravenous to subcutaneous vedolizumab was defined as successful in patients not experiencing a disease flare (pMAYO ≥ 2) or needing oral steroids or stopping subcutaneous vedolizumab during the 6 months of follow-up after the switch., Results: Overall, 168 patients were included. The switch was a success in 134 patients (79.8%). Vedolizumab retention rate was 88.7% at month six. C-reactive protein and faecal calprotectin values did not change after the switch (p = 0.07 and p = 0.28, respectively). Ten of the 19 patients who stopped subcutaneous formulation switched back to intravenous formulation recapturing clinical remission in 80%. Side effects were observed in 22 patients (13.1%)., Conclusion: Effectiveness of switching from intravenous to subcutaneous vedolizumab formulation in UC patients in steroid-free clinical remission is confirmed in a real-world setting., Competing Interests: Conflicts of Interest and source of funding Davide Giuseppe Ribaldone Lecture fees and Advisory Board per Janssen-Cilag, Takeda, Galapagos, Biogen. Laura Parisio Nothing to declare. Angela Variola Lecture fees and Advisory Board per Janssen-Cilag, Takeda, Pfizer, Ferring, MSD, Zambon, Abbvie, Celltrion. Fabrizio Bossa Lecture fees and Advisory Board per Janssen-Cilag, Takeda, Galapagos, Biogen, Abbvie, MSD, Celltrion, Mundipharma. Fabiana Castiglione Consultant for Abbvie, Fresenius, Sandoz, Galapagos, Pfizer, Takeda, Janssen, Biogen, Celltrion. Manuela Marzo Nothing to declare. Nicole Piazza Nothing to declare. Annalisa Aratari Advisory Board for Galapagos. Consultant for Abbvie, Galapagos, Pfizer, Takeda, Janssen. Edoardo Vincenzo Savarino Speaker for Abbvie, Agave, AGPharma, Alfasigma, Aurora Pharma, CaDiGroup, Celltrion, Dr Falk, EG Stada Group, Fenix Pharma, Fresenius Kabi, Galapagos, Janssen, JB Pharmaceuticals, Innovamedica/Adacyte, Malesci, Mayoly Biohealth, Omega Pharma, Pfizer, Reckitt Benckiser, Sandoz, SILA, Sofar, Takeda, Tillots, Unifarco. Consultant for Abbvie, Agave, Alfasigma, Biogen, Bristol-Myers Squibb, Celltrion, Diadema Farmaceutici, Dr. Falk, Fenix Pharma, Fresenius Kabi, Janssen, JB Pharmaceuticals, Merck & Co, Nestlè, Reckitt Benckiser, Regeneron, Sanofi, SILA, Sofar, Synformulas GmbH, Takeda, Unifarco. He received research support from Pfizer, Reckitt Benckiser, SILA, Sofar, Unifarco, Zeta Farmaceutici. Giorgia Bodini Nothing to declare. Mauro Mastronardi Lecture fees and Advisory Board per Takeda, Galapagos, Biogen, AuroraPharma Abbvie. Silvia Mazzuoli Lecture fees and Advisory Board per Janssen, Galapagos, Takeda, Abbvie, MSD, Pfizer. Federica Micheli Nothing to declare. Silvia Mazzuoli Nothing to declare. Marta Ascolani Nothing to declare. Chiara Viganò Lecture fees and Advisory Board for Janssen-Cilag, Takeda, Galapagos, Pfizer, Celltrion, Alfasigma. Maria Cappello Lecture fees and Advisory Board for Takeda, Janssen-Cilag, Biogen, Galapagos, Pfizer. Cristina Bezzio Lecture fees and Consultant for Ferring, Takeda, Janssen, Abbvie, Galapagos, Pfizer. Nothing to declare. Rachele Ciccocioppo Advisory Board for Galapagos, Takeda; scientific consultant for Revalma, and lecture fee from Fresenius-Kabi and Takeda. Giulia Scardino Nothing to declare. Ennio Sarli Nothing to declare. Daniela Pugliese Lecture fees and Advisory Board per Janssen-Cilag, Takeda, Galapagos, Biogen, MSD, Pfizer. Franco Scaldaferri Lecture fees and Advisory Board per Janssen-Cilag, Takeda, Galapagos, Ferring, Sandoz, MSD, Pfizer, Celltrion. Daniele Napolitano Nothing to declare. Alessia Todeschini. Andrea Geccherle Nothing to declare. Nicoletta Colaci Nothing to declare. Maria Guerra. Nothing to declare. Monica Annese Nothing to declare. Anna Testa Lecture fees and Consultant for Takeda, Janssen, Abbvie, Galapagos, Pfizer. Anna Caiazzo Nothing to declare. Francesco Simone Conforti Nothing to declare. Stefano Festa Advisory Board for Janssen-Cilag. Consultancy fees for Takeda, Pfizer. Greta Lorenzon Nothing to declare. Antonella Marra Nothing to declare. Ambra Magiotta Nothing to declare. Flavia Baccini Nothing to declare. Arnaldo Amato Nothing to declare. Anxhela Poshnjari Nothing to declare. Marta Vernero Nothing to declare. Flavio Caprioli Consultant to Abbvie, MSD, Takeda, Janssen, Roche, Celgene, Bristol-Meyers Squibb, Galapagos, Gilead, Pfizer, Mundipharma, Galapagos, Biogen, Ferring, Eli-Lilly, Nestlè. Lecture fees from Abbvie, Ferring, Takeda, Allergy Therapeutics, Janssen, Pfizer, Biogen, Sandoz, Tillotts Pharma. Unrestricted research grants from Giuliani, Sofar, MSD, Takeda, Abbvie, Celltrion, Pfizer. Gian Paolo Caviglia Nothing to declare., (Copyright © 2023 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.)

The management of moderate to severe ulcerative colitis has undergone significant changes over the past 15 years due to the regulatory approval of several new drugs. In particular, following the approval of the first biological, i.e. infliximab, a number of further biological drugs, such as adalimumab, golimumab, vedolizumab and ustekinumab, and small molecules, such as tofacitinib, have been approved, thus enriching the therapeutic armamentarium for ulcerative colitis. Choice of therapy must take into consideration not only the need to induce and maintain disease remission according to the patient's profile, but also age, co-morbidities, and prior treatments. To guide these decisions, the Italian Group for the Study of Inflammatory Bowel Disease has developed clinical guidelines that supersede its earlier document from 2011. These new guidelines were developed following the GRADE methodology for rating the quality of the evidence and for determining the strength of the recommendations. This article presents the methodology and results, in the form of 20 statements with commentary on the use of the five biologics and tofacitinib for managing the intestinal manifestations of active ulcerative colitis and for maintaining remission. A separate technical review reports the analyses of the evidence upon which the present recommendations are based., Competing Interests: Conflict of interest FSM served as an advisory board member and/or received lecture grants from AbbVie, Biogen, Galapagos, Janssen, MSD, Pfizer, Samsung Bioepis, and Takeda Pharmaceuticals. AO served as an advisory board member for AbbVie, Galapagos, MSD, Janssen, Pfizer, Takeda Pharmaceuticals, and received lecture grants from AbbVie, MSD, Sofar, Chiesi, Janssen, Pfizer, and Takeda Pharmaceuticals. CP has received consultancy fees and/or educational grants from Abbvie, MSD, Takeda, Pfizer, Janssen-Cilag, Sandoz, Chiesi, Sofar, Ferring and Zambon. SF: advisory board for Janssen Cilag; consultancy fees and/or educational grants from Takeda, SoFar, Abbvie, Zambon. DP received consultancy fees from Takeda, Jannsen-Cilag, Pfizer, and MSD. GF served as a consultant and advisory board member for Takeda, Abbvie, Janssen, Pfizer, Celltrion, Sandoz, AlfaSigma, Samsung Bioepis, Amgen, Roche, Ferring, Mylan, Galapagos. MCF received consultancy fees from Roche, Takeda, Jannsen-Cilag, Pfizer, Sandoz, Biogen, Galapagos and research economic support from Abbvie. FC served as consultant to Abbvie, MSD, Takeda, Janssen, Roche, Celgene, Bristol-Meyers Squipp, Galapagos, Gllead, Pfizer, Mundipharma, Galapagos, Biogen, received lecture fees from Abbvie, Ferring, Takeda, Allergy Therapeutics, Janssen, Pfizer, Biogen, and unrestricted research grants from Giuliani, Sofar, MSD, Takeda, Abbvie. MD served as advisor or received consultancy fees from: Roche, Takeda, Janssen, Pfizer, Abbvie, Bioclinica. AA: consulting and/or advisory board fees from AbbVie, Allergan, Amgen, Arena, Biogen, Boehringer Ingelheim, Bristol-Myers Squibb, Celltrion, Eli-Lilly, Ferring, Galapagos, Gilead, Janssen, MSD, Mylan, Pfizer, Roche, Samsung Bioepis, Sandoz, Takeda; lecture and/or speaker bureau fees from AbbVie, Amgen, Biogen, Bristol-Myers Squibb, Celltrion, Eli-Lilly, Ferring, Galapagos, Gilead, Janssen, MSD, Mitsubishi Tanabe, Novartis, Pfizer, Roche, Samsung Bioepis, Sandoz, Takeda, Tigenix; research grants: MSD, Pfizer, Takeda. SB, CP, and DP have no conflicts of interest to declare., (Copyright © 2022 The Authors. Published by Elsevier Ltd.. All rights reserved.)

The increased knowledge on the biological mechanisms underlying ulcerative colitis (UC) has triggered an advance in drug development, drastically changing the therapeutic landscape. Several biologics and small-molecule drugs have been regulatory approved (i.e., infliximab, adalimumab, golimumab, vedolizumab, ustekinumab and tofacitinib), and frequently pose clinical dilemmas: physicians need to know how these therapies can be used to optimize patient-important outcomes. Adhering to the "Grading of Recommendations Assessment, Development and Evaluation" (GRADE) methodology, this technical review systematically searched and identified the evidence, synthesized it using rigorous meta-analytic methodology, appraised its quality, and concisely presented it in a transparent way, forming the basis for developing clinical recommendations on the use of biologics and small-molecule drugs in adult patients with UC., Competing Interests: Conflict of interest Fabio Macaluso has served as an advisory board member and/or received lecture grants from AbbVie, Biogen, Galapagos, Janssen, MSD, Pfizer, Samsung Bioepis, and Takeda Pharmaceuticals. Ambrogio Orlando has served as an advisory board member for AbbVie, Galapagos, MSD, Janssen, Pfizer, Takeda Pharmaceuticals, and received lecture grants from AbbVie, MSD, Sofar, Chiesi, Janssen, Pfizer, and Takeda Pharmaceuticals. Stefano Festa has served as an advisory board member for Janssen Cilag, and received consultancy fees and/or educational grants from Takeda, SoFar, Abbvie, and Zambon. Claudio Papi has received consultancy fees and/or educational grants from Abbvie, MSD, Takeda, Pfizer, Janssen-Cilag, Sandoz, Chiesi, Sofar, Ferring and Zambon. Daniela Pugliese has received consultancy fees from Takeda, Jannsen-Cilag, Pfizer, and MSD. Alessandro Armuzzi has received consulting and/or advisory board fees from AbbVie, Allergan, Amgen, Arena, Biogen, Boehringer Ingelheim, Bristol-Myers Squibb, Celltrion, Eli-Lilly, Ferring, Galapagos, Gilead, Janssen, MSD, Mylan, Pfizer, Roche, Samsung Bioepis, Sandoz, Takeda; lecture and/or speaker bureau fees from AbbVie, Amgen, Biogen, Bristol-Myers Squibb, Celltrion, Eli-Lilly, Ferring, Galapagos, Gilead, Janssen, MSD, Mitsubishi Tanabe, Novartis, Pfizer, Roche, Samsung Bioepis, Sandoz, Takeda, Tigenix, and research grants from MSD, Pfizer, Takeda. Stefanos Bonovas, Claudia Pansieri and Daniele Piovani have no conflicts of interest to declare., (Copyright © 2022. Published by Elsevier Ltd.)

Background: Older age and comorbidities are the main risk factors for adverse COVID-19 outcomes in patients with inflammatory bowel disease (IBD). The impact of IBD medications is still under investigation., Aims: To assess risk factors for adverse outcomes of COVID-19 in IBD patients and use the identified risk factors to build risk indices., Methods: Observational cohort study. Univariable and multivariable logistic regression was used to identify risk factors associated with pneumonia, hospitalisation, need for ventilatory support, and death., Results: Of the 937 patients (446 with ulcerative colitis [UC]) evaluated, 128 (13.7%) had asymptomatic SARS-CoV-2 infection, 664 (70.8%) had a favourable course, and 135 (15.5%) had moderate or severe COVID-19. In UC patients, obesity, active disease and comorbidities were significantly associated with adverse outcomes. In patients with Crohn's disease (CD), age, obesity, comorbidities and an additional immune-mediated inflammatory disease were identified as risk factors. These risk factors were incorporated into two indices to identify patients with UC or CD with a higher risk of adverse COVID-19 outcomes. In multivariable analyses, no single IBD medication was associated with poor COVID-19 outcomes, but anti-TNF agents were associated with a lower risk of pneumonia in UC, and lower risks of hospitalisation and severe COVID-19 in CD., Conclusion: The course of COVID-19 in patients with IBD is similar to that in the general population. IBD patients with active disease and comorbidities are at greater risk of adverse COVID-19 outcomes. IBD medications do not pose additional risks. The risk indices may help to identify patients who should be prioritised for COVID-19 re-vaccination or for therapies for SARS-CoV-2 infection., (© 2021 John Wiley & Sons Ltd.)

Background: The long-term course of ulcerative colitis after a severe attack is poorly understood. Second-line rescue therapy with cyclosporine or infliximab is effective for reducing short-term colectomy but the impact in the long-term is controversial., Objective: The purpose of this study was to evaluate the long-term course of acute severe ulcerative colitis patients who avoid early colectomy either because of response to steroids or rescue therapy., Methods: This was a multicentre retrospective cohort study of adult patients with acute severe ulcerative colitis admitted to Italian inflammatory bowel disease referral centres from 2005 to 2017. All patients received intravenous steroids, and those who did not respond received either rescue therapy or colectomy. For patients who avoided early colectomy (within 3 months from the index attack), we recorded the date of colectomy, last follow-up visit or death. The primary end-point was long-term colectomy rate in patients avoiding early colectomy., Results: From the included 372 patients with acute severe ulcerative colitis, 337 (90.6%) avoided early colectomy. From those, 60.5% were responsive to steroids and 39.5% to the rescue therapy. Median follow-up was 44 months (interquartile range, 21-85). Colectomy-free survival probability was 93.5%, 81.5% and 79.4% at 1, 3 and 5 years, respectively. Colectomy risk was higher among rescue therapy users than in steroid-responders (log-rank test, p = 0.02). At multivariate analysis response to steroids was independently associated with a lower risk of long-term colectomy (adjusted odds ratio = 0.5; 95% confidence interval, 0.2-0.8), while previous exposure to antitumour necrosis factor-α agents was associated with an increased risk (adjusted odds ratio = 3.0; 95% confidence interval, 1.5-5.7). Approximately 50% of patients required additional therapy or new hospitalisation within 5 years due to a recurrent flare. Death occurred in three patients (0.9%)., Conclusions: Patients with acute severe ulcerative colitis avoiding early colectomy are at risk of long-term colectomy, especially if previously exposed to antitumour necrosis factor-α agents or if rescue therapy during the acute attack was required because of steroid refractoriness., (© 2020 The Authors. United European Gastroenterology Journal published by Wiley Periodicals LLC. on behalf of United European Gastroenterology.)

Background: Few data exist regarding the long-term effectiveness of golimumab in ulcerative colitis. No data have been reported on real-world continuous clinical response., Objective: This study aimed to describe the long-term outcomes in a large cohort of patients on golimumab who had ulcerative colitis., Methods: Consecutive patients with active ulcerative colitis, started on golimumab, were enrolled and prospectively followed up. The primary end point was to evaluate the long-term persistence on golimumab therapy., Results: A total of 173 patients with ulcerative colitis were studied. Of these, 79.2% were steroid dependent, and 46.3% were naïve to anti-tumour necrosis factor alpha agents. The median duration of golimumab therapy was 52 weeks (range: 4-142 weeks). The cumulative probability of maintaining golimumab treatment was 47.3% and 22.5% at 54 and 108 weeks, respectively. Biological-naïve status (odds ratio [OR] = 3.02, 95% confidence interval [CI]: 1.44-6.29; p = 0.003) and being able to discontinue steroids at Week 8 (OR = 3.32, 95% CI: 1.34-8.30; p = 0.010) and Week 14 (OR = 2.94, 95% CI: 1.08-8.02; p = 0.036) were associated with longer persistence on therapy. At Week 54, 65/124 (52.4%) postinduction responders were in continuous clinical response. A continuous clinical response was associated with a lower likelihood of golimumab discontinuation throughout the subsequent year of therapy (p < 0.01). Overall, 40 (23.1%) patients were in clinical remission at the last follow-up visit. Twenty-six adverse events were recorded, leading to golimumab withdrawal in 9.2% of patients., Conclusions: Biological-naïve status and not requiring steroids at Weeks 8 and 14 seem to be associated with a longer persistence on golimumab therapy in ulcerative colitis., (© 2020 The Authors. United European Gastroenterology Journal published by Wiley Periodicals LLC. on behalf of United European Gastroenterology.)

Introduction: Budesonide belongs to low-bioavailability steroids class. A novel oral formulation of budesonide, which uses the Multi-Matrix System (MMX) for delivering drugs to the colon, is now available as a possible treatment of ulcerative colitis patients intolerant or not-responding to first-line therapy with 5-ASA. Areas covered: in this review we present information about the development and the use of budesonide MMX and we provide data about its mechanism of action as well as, pharmacodynamics and pharmacokynetics. Moreover, we present the available literature data about the efficacy and, mainly, the safety of budesonide-MMX. Expert opinion: budesonide-MMX is a new therapeutic option in mild-to-moderate UC patients. Its good safety profile in clinical trials undoubtedly represents a strength for a possible wide use in clinical practice, mainly if it will be confirmed by post-marketing data. Other indications, such as treatment of colonic Crohn's disease, could theoretically be considered, if sustained by reliable scientific data.

Inflammatory bowel diseases, Crohn's disease and ulcerative colitis are chronic relapsing conditions that may result in progressive bowel damage, high risk of complications, surgery and permanent disability. The conventional therapeutic approach for inflammatory bowel diseases is based mainly on symptom control. Unfortunately, a symptom-based therapeutic approach has little impact on major long-term disease outcomes. In other chronic disabling conditions such as diabetes, hypertension and rheumatoid arthritis, the development of new therapeutic approaches has led to better outcomes. In this context a "treat to target" strategy has been developed. This strategy is based on identification of high-risk patients, regular assessment of disease activity by means of objective measures, adjustment of treatment to reach the pre-defined target. A treat to target approach has recently been proposed for inflammatory bowel disease with the aim at modifying the natural history of the disease. In this review, the evidence and the limitations of the treat to target paradigm in inflammatory bowel disease are analyzed and discussed.

Introduction: Patients with ulcerative colitis (UC) have an increased risk of developing colorectal cancer (CRC). Surveillance colonoscopy is currently recommended for patients with long-standing extensive colitis for reducing CRC risk. Chemoprevention is an attractive complementary strategy. Areas covered: Inflammation is a major determinant of CRC risk and is potentially modifiable. Reducing inflammation is supposed to reduce CRC risk. Several medications have been evaluated in this setting: 5-ASA, thiopurines, anti-TNFα agents and ursodeoxycholic acid (UCDA) in patients with associated primary sclerosing cholangitis (PSC). This review offers a critical evaluation of current evidence of the potential chemopreventive effect of such medications. Expert commentary: No randomized controlled trials have been performed and the available evidence come from observational studies. Although biological plausibility supports a chemopreventive role of the aforementioned agents, the overall evidence of efficacy is weak because of several methodological limitations of the studies. Indirect epidemiological evidence, biologic plausibility and results of meta-analyses reasonably support a potential chemopreventive effect of 5-ASA. Available evidence does not support a specific chemopreventive effect of purine analogues and anti-TNFα medications, despite their efficacy in the management of inflammatory bowel disease. Data addressing UDCA and folate supplementation are inconclusive. Limited data are available for statins.

Objective: Ulcerative Colitis (UC) is a chronic inflammatory disease of the colon of unknown etiology. Several clinical indexes have been proposed for UC disease activity evaluation, but none have been properly validated. Moreover, the reference parameter for the scores and their prognostic value is not clear. Mucosal healing has been recently proposed as an important end-point. Aim of the present study was to evaluate the correlation of four clinical indexes with objective diagnostic tools for UC evaluation, the discriminative ability in identifying patients with endoscopic mucosal healing, and to analyze the possible prognostic indication for disease course in 1 year of follow-up., Patients and Methods: We analyzed data of 75 patients recorded in regular follow-up visit in IBD clinic at S. Andrea Hospital, Rome, between 2007-2011. We recorded clinical data and lab tests at the time of the visit, and endoscopic/histological reports performed within 1 month. Clinical indexes (Seo' activity index, Simple Clinical Colitis Activity Index, partial Mayo score and Endoscopic-Clinical Correlation Index) were calculated and correlation to endoscopic and histologic activity, and to C-reactive protein increment, was assessed by mean of Spearman's rank correlation. Discriminative ability of the indexes for patients with and without endoscopic mucosal healing was tested by calculation of area under ROC curve (AUC). Patients with low and high clinical scores were compared for number of flares and increment of therapy during 1 year of follow-up., Results: Clinical indexes had a good correlation with endoscopic activity (mean r = 0.73 ± 0.06), a fair correlation with CRP-increment (mean r = 0.55 ± 0.01) and a poor one with histologic activity (mean r = 0.35 ± 0.01). The discriminatory ability of the indexes for endoscopic mucosal healing was good for all the indexes (mean AUC = 0.87 ± 0.05). Patients with high clinical score had more flares and required more frequently increase of therapy at 1 year of follow up compared with patients with low score., Conclusions: Clinical indexes have a good correlation with endoscopic activity and can discriminate patients with and without mucosal healing. Patients with low and high score have different risk of disease flare and of need to increase therapy at 1 year. Clinical indexes may represent a useful tool for disease assessment in clinical practice in UC outpatients with mild-moderate disease.

Even though the exact amount of the increased risk is not known, patients with Ulcerative Colitis (UC) are more likely to develop colonic malignancy compared with the general population. 5-aminosalicilic acid (5-ASA) compounds are the mainstay therapy for mild-moderate UC, and their use for chemoprevention of colorectal cancer has been proposed, but the evidences are not univocal. Aim of the present work is to critically revise the available data on 5- ASA utilization for cancer chemoprevention, as well as the possible impact in the management of UC patients. In clinical practice, in fact, the best means to measure the dimension of a therapeutic effect is the number needed to treat (NNT). In our study, we show how different basal risk of colorectal cancer reported in studies coming from Europe and USA can affect the NNT, making the strategy "cost-effective" or not. Since prospective randomized controlled trials to address the chemopreventive effect of 5-ASA are not feasible, evidence relays upon observational studies that may imply several biases. Therefore, the heterogeneity of the data is mainly consequent to the different methodological approach of the published studies, in terms of study design, data collection, definitions of regular use of medication and measures of therapeutic efficacy. In addition, two meta-analyses are available with apparently conflicting results. Nonetheless, 5-ASA represents an ideal chemopreventive agent for its anti-inflammatory property, safety, acceptability and inexpensiveness, and even ECCO guidelines recommend 5-ASA long term use, as these compounds may decrease the incidence of CRC.