IDH1-mutated Crohn's disease-associated small bowel adenocarcinomas: Distinctive pathological features and association with MGMT methylation and serrated-type dysplasia.

AIMS: Patients with Crohn's disease (CrD) have an elevated risk for the development of small bowel adenocarcinomas (SBAs). Actionable isocitrate dehydrogenase 1 (IDH1) mutations have been reported to be more frequent in CrD-SBAs than in sporadic SBAs. The present study aimed to investigate the clinicopathological and immunophenotypical features, as well as methylation profiles, of IDH1-mutated CrD-SBAs. METHODS AND RESULTS: An international multicentre series of surgically resected CrD-SBAs was tested for IDH1 mutation. Clinicopathological features, immunophenotypical marker expression and O6-methylguanine-DNA methyltransferase (MGMT) and long interspersed nuclear element-1 (LINE-1) methylation were compared between IDH1-mutated and IDH1 wild-type CrD-SBAs. Ten (20%) of the 49 CrD-SBAs examined harboured an IDH1 mutation and all the mutated cancers harboured the R132C variant. Compared to IDH1 wild-type cases, IDH1-mutated CrD-SBAs showed significantly lower rates of cytokeratin 7 expression (P = 0.005) and higher rates of p53 overexpression (P = 0.012) and MGMT methylation (P = 0.012). All three dysplastic growths associated with IDH1-mutated SBAs harboured the same IDH1 variant (R132C) of the corresponding invasive cancer, and all were of non-conventional subtype (two serrated dysplastic lesions and one goblet cell-deficient dysplasia). In particular, non-conventional serrated dysplasia was significantly associated with IDH1-mutated CrD-SBAs (P = 0.029). No significant cancer-specific survival difference between IDH1-mutated CrD-SBA patients and IDH1 wild-type CrD-SBA patients was found (hazard ratio = 0.55, 95% confidence interval = 0.16-1.89; P = 0.313). CONCLUSIONS: IDH1-mutated CrD-SBAs, which represent approximately one-fifth of total cases, are characterised by distinctive immunophenotypical features and methylation profiles, with potential therapeutic implications. Moreover, IDH1-mutated non-conventional, serrated dysplasia is likely to represent a precursor lesion to such CrD-SBAs.

Update on the Management of Inflammatory Bowel Disease during Pregnancy and Breastfeeding.

Inflammatory bowel disease (IBD) affects patients during their peak reproductive years. This raises important questions, in both patients and healthcare providers, regarding conception, pregnancy, and breastfeeding. Lack of information and insufficient communication among healthcare providers can leave patients with limited information and even contradictory advice. Given the fact that pregnant and/or breastfeeding IBD patients are excluded from clinical studies the evidence on many questions related to pregnancy and postpartum period is limited. However, there exists increasing data from case series and cohort studies that allows to provide clinical guidance. The overarching concept is that optimizing the mother's health is critical for optimizing the health of the unborn child and benefit of continuing medical therapy in IBD during pregnancy outweighs possible risks in most instances. This paper provides an up-to-date systematic review of the literature on IBD in pregnancy and proposes guidance to questions frequently encountered by healthcare professionals.

Prophylactic versus endoscopy-driven treatment of Crohn's postoperative recurrence: A retrospective, multicentric European study (PORCSE study).

BACKGROUND AND AIMS: No consensus exists on optimal strategy to prevent postoperative recurrence (POR) after ileocecal resection (ICR) for Crohn's disease (CD).We compared early medical prophylaxis versus expectant management with treatment driven by findings at elective endoscopy 6-12 months after ICR. METHODS: A retrospective, multicentric, observational study was performed. CD-patients undergoing first ICR were assigned to cohort1 if a biologic or immunomodulator was (re)started prophylactically after ICR, or to cohort2 if no postoperative prophylaxis was given and treatment was started as reaction to elective endoscopic findings. Primary endpoint was rate of endoscopic POR (Rutgeerts>i1). Secondary endpoints were severe endoscopic POR (Rutgeerts i3/i4), clinical POR, surgical POR and treatment burden during follow-up. RESULTS: Of 346 included patients, 47.4% received prophylactic postoperative treatment (proactive/cohort1) and 52.6% did not (reactive/cohort2).Endoscopic POR (Rutgeerts>i1) rate was significantly higher in cohort2 (41.5% vs 53.8%, OR1.81, P=0.039) at endoscopy 6-12 months after surgery. No significant difference in severe endoscopic POR was found (OR1.29, P=0.517). Cohort2 had significantly higher clinical POR rates (17.7% vs 35.7%, OR3.05, P=0.002) and numerically higher surgical recurrence rates (6.7% vs 13.2%, OR2.59, P=0.051). Cox proportional hazards regression analysis showed no significant difference in time to surgical POR of proactive versus expectant/reactive approach (HR2.50, P=0.057). Quasi-Poisson regression revealed a significantly lower treatment burden for immunomodulator use in cohort2 (mean ratio 0.53, P=0.002), but no difference in burden of biologics or combination treatment. CONCLUSIONS: The PORCSE study showed lower rates of endoscopic POR with early postoperative medical treatment compared to expectant management after first ileocecal resection for Crohn's disease.

Pneumocystis jirovecii Pneumonia in Patients with Inflammatory Bowel Disease-a Case Series.

BACKGROUND AND AIM: Pneumocystis jirovecii pneumonia [PJP] is a very rare, potentially life-threatening pulmonary fungal infection that occurs in immunocompromised individuals including patients with inflammatory bowel disease [IBD]. Our aim was to describe immunosuppressive treatment exposure as well as the outcome in IBD patients with PJP. METHODS: PJP cases were retrospectively collected through the COllaborative Network For Exceptionally Rare case reports of the European Crohn's and Colitis Organisation. Clinical data were provided through a case report form. RESULTS: In all, 18 PJP episodes were reported in 17 IBD patients [10 ulcerative colitis and seven Crohn's disease]. The median age at PJP diagnosis was 55 years (interquartile range [IQR], 40-68 years]. Two PJP [11.1%] occurred in patients on triple immunosuppression, 10 patients [55.6%] had double immunosuppressive treatment, four patients [22.2%] had monotherapy and two PJP occurred in absence of immunosuppressive treatment [one in a human immunodeficiency virus patient and one in a patient with a history of autologous stem cell transplantation]. Immunosuppressive therapies included steroids [n = 12], thiopurines [n = 10], infliximab [n = 4], ciclosporin [n = 2], methotrexate [n = 1], and tacrolimus [n = 1]. None of the patients diagnosed with PJP had received prophylaxis. All patients were treated by trimethoprim/sulphamethoxazole or atovaquone and an intensive care unit [ICU] stay was required in seven cases. Two patients [aged 71 and 32 years] died, and one patient had a recurrent episode 16 months after initial treatment. Evolution was favourable for the others. CONCLUSION: This case series reporting potentially fatal PJP highlights the need for adjusted prophylactic therapy in patients with IBD on immunosuppressive therapy.

Mismatch repair deficiency as prognostic factor for stage III small bowel adenocarcinoma: A multicentric international study.

BACKGROUND: Small bowel adenocarcinoma (SBA) is a rare cancer with an aggressive behavior. No study has specifically addressed the putative prognostic role of mismatch repair status in stage III SBAs. AIMS: We aimed to investigate whether mismatch repair deficiency is associated with cancer-specific survival in a Western cohort of patients with stage III SBAs. METHODS: In this retrospective multicentric international cohort study, we enrolled 70 patients who underwent surgically resection for stage III SBAs and we analyzed the frequency of mismatch repair deficiency, tested by immunohistochemistry for mismatch repair proteins and by polymerase chain reaction for microsatellite instability, and its association with cancer-specific survival and other clinic-pathologic factors. RESULTS: We found sixteen (23%) patients with mismatch repair deficient adenocarcinoma, without discordance between immunohistochemical and polymerase chain reaction for microsatellite instability analyses. Mismatch repair deficiency proved to be associated with a better outcome both at univariable analysis (hazard ratio: 0.28, 95% confidence interval: 0.08-0.91, p: 0.035) and in bivariable models adjusted for patient age or gender, tumor site, pT4 stage, tumor budding, and perineural invasion. CONCLUSION: This study highlights the importance of testing mismatch repair status to improve prognostic stratification in stage III SBAs.

Safety of sequential biological therapy in inflammatory bowel disease: results from a tertiary referral centre.

BACKGROUND: Biologicals represent the cornerstone of treatment for moderate-to-severe inflammatory bowel diseases (IBD). Many patients cycle between biologicals when encountering loss of response or adverse events. AIM: To assess the occurrence of serious infections and malignancies with exposure to several (classes of) biologicals. METHODS: We performed a retrospective cohort study in a tertiary referral centre including consecutive IBD patients exposed to adalimumab, infliximab, ustekinumab or vedolizumab between 1996 and 2019. All serious infections and malignancies, as well as potential confounders, were accounted for. RESULTS: In total, 1575 patients were included with a median (interquartile range) follow-up of 10 (6-16) years and a duration of biological therapy of 71 (39-112) months. Incidence rates of serious infections were 3.4 per 100 patients' years (PY) in the post-biological setting. Serious infections after biological exposure were associated with systemic steroids in monotherapy (hazard ratio 2.96 [95% confidence interval 1.78-4.93], p < 0.0001), combination therapy of systemic steroids and a biological (2.44 [1.37-4.34], p = 0.002), female gender (1.25 [1.04-1.51], p = 0.02), and prior serious infections in the pre-biological setting (1.42 [1.03-1.96], p = 0.03). Malignancy rates were 1.06 per 100PY in the post-biological setting and increased with older age at biological initiation (1.04 [1.02-1.05], p < 0.0001). The risk for serious infections or malignancies was independent of type and number of biologicals to which the patient was exposed. CONCLUSION: This study shows that the sequential use of biological therapy in IBD does not seem to convey an overall higher risk of serious infections or malignancies, but that underlying more refractory disease seems to increase this risk.

Translating Results from VARSITY to Real World: Adalimumab vs Vedolizumab as First-line Biological in Moderate to Severe IBD.

BACKGROUND: Selecting a first-line therapy remains challenging in IBD. Adalimumab (ADM) and vedolizumab (VDZ) effectively lead to endoscopic remission in moderate to severe IBD. The VARSITY trial showed superiority of VDZ over ADM in ulcerative colitis (UC) regarding clinical remission and endoscopic improvement at week 52. We explored these results in a real-world setting of UC and Crohn's disease (CD). METHODS: This retrospective study followed a cohort of biologic-naïve patients starting ADM or VDZ from 2015-2019. Patients had moderate to severe disease (endoscopic Mayo score ≥2 for UC, presence of ulcerations for CD) prior to therapy initiation. For UC, endoscopic remission (endoscopic Mayo score 0) and improvement (endoscopic Mayo score ≤1) at week 52 were assessed. For CD, endoscopic remission (absence of ulcerations) and improvement (markedly better endoscopy despite ulcerations) at weeks 26-52 were studied. Treatment persistence was also evaluated. RESULTS: In total, 195 biologic-naïve patients (109 UC; 86 CD) were included. In UC, VDZ was superior to ADM regarding endoscopic remission (29% vs 11%, P = .03), endoscopic improvement (51% vs 26%, P = .01) at week 52, and treatment persistence (P = .04). In CD, no differences in endoscopic remission (VDZ 48% vs ADM 60%; P=0.37), improvement (VDZ 76% vs ADM 77%; P = 1.00), or treatment persistence (P=0.43) at weeks 26-52 were seen. Safety profiles were similar in UC and CD. CONCLUSIONS: This real-world cohort study of biologic-naïve IBD patients found VDZ to be superior to ADM as first-line treatment for patients with UC-but not CD-regarding endoscopic remission at week 52 and treatment persistence.

Adalimumab versus ustekinumab as first-line biological in moderate-to-severe Crohn's disease: real-life cohort from a tertiary referral center.

BACKGROUND: Therapeutic options for Crohn's disease are growing, making the choice of first-line therapy relevant. Both adalimumab and ustekinumab are effective in moderate-to-severe Crohn's disease. The Safety and Efficacy of Adalimumab Versus Ustekinumab for One Year trial suggested no difference in clinical or endoscopic remission at week 52 in biological-naive Crohn's disease patients. We explored if results withstand in the real world. METHODS: We included bio-naive Crohn's disease patients starting adalimumab or ustekinumab between 2017 and 2020. Patients had endoscopy-proven moderate-to-severe disease [Simple Endoscopic Score for Crohn's disease (SES-CD) ≥3]. Clinical remission was defined as Harvey Bradshaw Index (HBI) <5 or physician global assessment. Endoscopic remission (SES-CD <3) and improvement (≥50% reduction in SES-CD from baseline) were assessed at W26-52. Propensity score matching was used. RESULTS: A total of 68 biological-naive Crohn's disease patients were included (32 adalimumab and 32 ustekinumab) and followed for median of (IQR) 60 (33-104) weeks. Patients had significantly higher odds of achieving endoscopic remission with adalimumab than ustekinumab [adjusted odds ratio (aOR), 2.73; confidence interval (CI), 1.12-7.36; P = 0.03]. Also, more adalimumab-treated patients achieved endoscopic response, clinical remission at week 26 and 52 (aOR, 2.24; CI, 0.94-5.71; P = 0.07; aOR, 1.26; CI, 0.36-4.51; P = 0.72; aOR, 1.58; CI, 0.54-4.88; P = 0.41, respectively). Treatment persistence was not different between groups (P = 0.44). The number of adverse events was similar. CONCLUSION: In a real-world cohort of biological-naive Crohn's disease patients, adalimumab was superior to ustekinumab in achieving endoscopic remission. No differences in clinical remission at W26-52 or treatment persistence were observed. Both adalimumab and ustekinumab remain good options as first-line biologicals in moderate-to-severe Crohn's disease.

Surgery due to Inflammatory Bowel Disease During Pregnancy: Mothers and Offspring Outcomes From an ECCO Confer Multicentre Case Series [Scar Study].

AIMS: i] To evaluate the evolution of pregnancies and offspring after inflammatory bowel disease [IBD] surgery during pregnancy; and ii] to describe the indications, the surgical techniques, and the frequency of caesarean section concomitant with surgery. METHODS: Patients operated on due to IBD during pregnancy after 1998 were included. Participating clinicians were asked to review their databases to identify cases. Data on patients' demographics, IBD characteristics, medical treatments, IBD activity, pregnancy outcomes, surgery, delivery, and foetal and maternal outcomes, were recorded. RESULTS: In all, 44 IBD patients were included, of whom 75% had Crohn's disease; 18% of the surgeries were performed in the first trimester, 55% in the second, and 27% in the third trimester. One patient had complications during surgery, and 27% had postsurgical complications. No patient died. Of deliveries, 70% were carried out by caesarean section. There were 40 newborns alive. There were four miscarriages/stillbirths [one in the first, two in the second, and one in the third trimester]; two occurred during surgery, and another two occurred 2 weeks after surgery; 14% of the surgeries during the second trimester and 64% of those in the third trimester ended up with a simultaneous caesarean section or vaginal delivery. Of the 40 newborns, 61% were premature and 47% had low birth weight; 42% of newborns needed hospitalisation [25% in the intensive care unit]. CONCLUSIONS: IBD surgery during pregnancy remains an extremely serious situation. Therefore, surgical management should be performed in a multidisciplinary team, involving gastroenterologists, colorectal surgeons, obstetricians, and neonatal specialists.

Long-term outcomes of patients with ulcerative proctitis: Analysis from a large referral centre cohort.

INTRODUCTION: Long-term outcomes of patients with ulcerative proctitis (UP) have been poorly investigated, since these patients are excluded from participation in randomized controlled clinical trials. OBJECTIVE: The aim of this study was to investigate the prognostic and therapeutic long-term outcomes of patients with UP. METHODS: A retrospective study of patients with UP followed at our referral centre between 1 January 1998 and 1 January 2019 was performed. Treatment success was defined as clinical response (significant improvement in UP-related symptoms) and endoscopic response (mayo endoscopic sub-score of 0 or 1) if available at last follow-up. RESULTS: From a total of 1561 patients with ulcerative colitis, 118 patients with UP were identified. A total of 36 (31%) patients were refractory to rectal and oral therapy with 5-ASA and corticosteroids, necessitating azathioprine as monotherapy in 19 (16%) patients and/or biological therapies in 33 (28%) patients. After a median follow-up of 71 months (interquartile range 29-149 months), treatment success was observed in 103/118 (87%) UP patients and in 25/36 (69%) patients with refractory UP. Clinical response rates were significantly higher for refractory UP patients treated with biologicals (23/33; 70%) compared to ones treated with azathioprine (2/19; 11%; p = 0.001). CONCLUSION: Good clinical outcomes were recorded in UP, with treatment success in 87% of patients. Nevertheless, 28% needed escalation to biologicals. Long-term outcome in patients on biologicals was superior to azathioprine.

Evaluating Efficacy, Safety, and Pharmacokinetics After Switching From Infliximab Originator to Biosimilar CT-P13: Experience From a Large Tertiary Referral Center.

BACKGROUND: The use of infliximab biosimilar CT-P13 has increased in patients with inflammatory bowel disease. Nevertheless, doubts about switching from infliximab originator to biosimilar still exist among patients and health care professionals. METHODS: Our tertiary referral center underwent a mandatory switch from infliximab originator to CT-P13 in 2017. We investigated pharmacokinetics, efficacy, and safety of this switch. The primary endpoint was infliximab discontinuation within 6 months of switching. Secondary endpoints included loss of clinical remission, need for treatment optimization, adverse events, evolution of patient-reported outcome, C-reactive protein, infliximab trough levels, and antidrug-antibodies. RESULTS: A total of 361 patients (54.0% male, 70.0% Crohn's disease, 55.6% in clinical remission) were enrolled. Infliximab discontinuation within 6 months was observed in 4%. Loss of clinical remission, adverse events, and antidrug-antibodies were identified in only 2.0%, 2.2%, and 1.1% of patients, respectively. C-reactive protein concentrations and infliximab trough levels remained stable. Independent factors associated with remission at 6 months were lower PRO2 at switch (HR 6.024; 95% CI, 4.878-8.000; P < 0.0001) and higher hemoglobin levels (HR 1.383; 95% CI, 1.044-2.299; P = 0.018). CONCLUSIONS: Switching from infliximab originator to CT-P13 was not associated with an increased risk of treatment discontinuation, loss of clinical remission, or adverse events. No significant changes in infliximab trough levels or immunogenicity could be identified.

Pregnancy outcomes in inflammatory bowel disease patients treated with vedolizumab, anti-TNF or conventional therapy: results of the European CONCEIVE study.

BACKGROUND: Women with inflammatory bowel diseases (IBD) often receive biologicals during pregnancy to maintain disease remission. Data on outcome of vedolizumab-exposed pregnancies (VDZE) are sparse. AIMS: To assess pregnancy and child outcomes of VDZE pregnancies and to compare these results to anti-TNF exposed (TNFE) or both immunomodulatory and biologic unexposed (CON IBD) pregnancies. METHODS: A retrospective multicentre case-control observational study was performed. RESULTS: VDZE group included 79 pregnancies in 73 IBD women. The TNFE and CON IBD group included 186 pregnancies (162 live births) in 164 IBD women and 184 pregnancies (163 live births) in 155 IBD women, respectively. At conception, cases more often had active disease ([VDZE: 36% vs TNFE: 17%, P = .002] and [VDZE: 36% vs CON IBD: 24%, P = .063]). No significant difference in miscarriage rates were found between groups (VDZE and TNFE: 16% vs 13%, P = .567; VDZE and CON IBD: 16% vs 10%, P = .216). In live-born infants, median gestational age and birthweight were similar between groups. Median Apgar score at birth was numerically equal. Prematurity was similar in the VDZE group compared to the control groups, even when correcting for disease activity during pregnancy. The frequency of congenital anomalies was comparable between groups as were the percentages of breastfed babies. During the first year of life, no malignancies were reported and infants' infection risk did not significantly differ between groups. CONCLUSION: No new safety signal was detected in VDZE pregnancies although larger, prospective studies are required for confirmation.

Clostridium difficile infection in inflammatory bowel disease: epidemiology over two decades.

BACKGROUND: The incidence of Clostridium difficile infection (CDI) has been rising in the overall population as well as in patients with inflammatory bowel disease (IBD). However, the incidence of CDI in IBD may be changing owing to alterations in medical therapies. OBJECTIVE: The aim of this study was to establish the incidence of CDI in IBD over the past two decades and compare risk factors, disease characteristics and outcomes between IBD and non-IBD patients. PATIENTS AND METHODS: In this retrospective case-control study, the incidence of CDI in IBD was followed for 18 years. The electronic database of our centre was reviewed for all stool samples received from patients admitted to gastroenterology wards or visiting the outpatient clinic. Diagnosis of CDI was based on diagnostic criteria that evolved throughout the years. RESULTS: IBD patients (n=44) with CDI were found to be younger (P=0.0001), have less cardiovascular comorbidity (P=0.023), fewer prior hospitalizations (P=0.009) and fewer prior antibiotic use (P=0.005). More IBD patients were on biologic therapy (P=0.0001) or steroids (P=0.001) but less likely taking proton pump inhibitors (P=0.001). The number of stool testing per year increased as well as the median number of positive stool samples for CDI (2% in 2000-2008 to 3% in 2009-2017, P=0.032). Pseudomembranes were only seen in non-IBD patients (28%, P=0.048). There was no difference in the choice of antibiotics between IBD and non-IBD patients [metronidazole (36 vs. 51%) and vancomycin (36 vs. 26%), P=0.090 and 0.190]. The 1-year mortality rate was lower in IBD patients compared with non-IBD patients (0 vs. 32%, P=0.0001). CONCLUSION: In the past two decades, the incidence of CDI in IBD and non-IBD patients has increased. However, the overall outcome of CDI in IBD patients was favourable compared with non-IBD patients.

Outcome of Pregnancies in Female Patients With Inflammatory Bowel Diseases Treated With Vedolizumab.

BACKGROUND AND AIMS: Vedolizumab is an IgG1 anti-α4ß7 integrin antibody approved for the treatment of inflammatory bowel diseases [IBD], but without clear safety data during conception, pregnancy and nursing. Animal studies showed that mucosal vascular addressin cell adhesion molecule 1 [MAdCAM-1] is expressed by maternal vessels in the placenta and recruits α4ß7-expressing cells that are considered important for maternal/fetal tolerance. Blocking this interaction by vedolizumab might affect this process. We aimed to evaluate pregnancy outcomes in vedolizumab-treated female IBD patients. METHODS: We conducted a retrospective, multicentre Belgian observational study. Details on disease activity, prenatal complications, delivery and neonatal outcome were collected through a case report form. RESULTS: Twenty-four pregnancies were reported. Five women had active disease at conception and one patient flared during pregnancy. There were 23 live births. Complications were observed in 25% of pregnancies [premature rupture of membranes, pre-eclampsia, miscarriage, elective termination and stillbirth] and in 35% of infants [prematurity, intra-uterine growth retardation, small for gestational age and congenital malformations including hip dysplasia, pulmonary valve stenosis and Hirschprung's disease]. Vedolizumab was continued throughout pregnancy in two females and stopped in the 1st and 2nd trimester in five and 16 patients, respectively. For live born children, the median [interquartile range] gestational age, weight and Apgar score 5 min after birth were 39 [37-39.6] weeks, 3270 [3080-3585] grams and 10 [9-10], respectively. CONCLUSIONS: Although several complications were observed, both in mothers and in newborns, no firm conclusions can be drawn. Awaiting prospective and controlled registries, vigilance and strict follow-up of pregnant patients treated with vedolizumab seems mandatory.

Perioperative Use of Vedolizumab is not Associated with Postoperative Infectious Complications in Patients with Ulcerative Colitis Undergoing Colectomy.

BACKGROUND AND AIMS: Preoperative use of vedolizumab has been associated with increased short-term postoperative infectious complications. We assessed this risk in a single-centre cohort of patients with ulcerative colitis undergoing colectomy. METHODS: Chart review was performed for all colectomies between 2006 and 2016. Short-term postoperative [non]infectious complications were evaluated within 30 days after colectomy. The comprehensive complication index was calculated based on all reported events. RESULTS: We identified 170 eligible patients [46% female, median age 40 years]. Thirty-four patients [20%] received vedolizumab within 16 weeks, 60 [35%] received anti-tumour necrosis factor [TNF] within 8 weeks, 32 [19%] received a moderate-to-high dose of prednisone and 71 [42%] received other therapies at colectomy. Pouch construction was performed at first stage in 47 patients [28%], and less frequently in patients under vedolizumab, anti-TNF or steroids [all p < 0.01]. Sixty-two short-term infectious and 75 noninfectious complications were reported in, respectively, 49 [29%] and 64 [38%] patients. Only pouch construction at first stage of surgery was independently associated with short-term postoperative infectious (odds ratio 2.40 [95% confidence interval 1.18-4.90], p = 0.016), overall complications (3.11 [1.52-6.40], p = 0.002) and more severe complications (comprehensive complication index 20.9 [0.0-30.8] vs 0.0 [0.0-20.9], p = 0.001). Perioperative medical therapy [including vedolizumab] did not influence short-term outcome, either in the overall population or in the subpopulation of patients with pouch construction at a second stage. CONCLUSIONS: Perioperative use of vedolizumab was not associated with short-term postoperative [infectious] complications. However, postponing pouch construction to a second stage of surgery is advisable in patients under biological therapy or moderate-to-high doses of steroids.