Advanced nanomedicines and immunotherapeutics to treat respiratory diseases especially COVID-19 induced thrombosis

Immunotherapy and associated immune regulation strategies gained huge attraction in order to be utilized for treatment and prevention of respiratory diseases.Engineering specifically nanomedicines can be used to regulate host immunity in lungs in the case of respiratory diseases including coronavirus disease 2019(COVID-19)infection.COVID-19 causes pulmonary embolisms,thus new therapeutic options are required to target thrombosis,as conventional treatment options are either not effective due to the complexity of the immunethrombosis pathophysiology.In this review,we discuss regulation of immune response in respiratory diseases especially COVID-19.We further discuss thrombosis and provide an overview of some antithrombotic nanoparticles,which can be used to develop nanomedicine against thrombo-inflammation induced by COVID-19 and other respiratory infectious diseases.We also elaborate the importance of immunomodulatory nanomedicines that can block pro-inflammatory signalling pathways,and thus can be recommended to treat respiratory infectious diseases.

Loss to Specialized Cardiology Follow-Up in Adults Living with Congenital Heart Disease

Background:Much has been written about the loss to follow-up in the transition between pediatric and adult Congenital Heart Disease(CHD)care centers.Much less is understood about the loss to follow-up(LTF)after a successful transition.This is critical too,as patients lost to specialised care are more likely to experience mor-bidity and premature mortality.Aims:To understand the prevalence and reasons for loss to follow-up(LTF)at a large Australian Adult Congenital Heart Disease(ACHD)centre.Methods:Patients with moderate or highly complex CHD and gaps in care of>3 years(defined as LTF)were identified from a comprehensive ACHD data-base.Structured telephone interviews examined current care and barriers to clinic attendance.Results:Overall,407(22%)of ACHD patients(n=1842)were LTF.The mean age at LTF was 31(SD 11.5)years and 54%were male;311(76%)were uncontactable.Compared to adults seen regularly,lost patients were younger,with a greater socio-economic disadvantage,and had less complex CHD(p<0.05 for all).We interviewed 59 patients(14%).The top 3 responses for care absences were“feeling well”(61%),losing track of time(36%),and not needing fol-low-up care(25%).Conclusions:A large proportion of the ACHD population becomes lost to specialised cardiac care,even after a successful transition.This Australian study reports younger age,moderate complexity defects,and socio-economic disadvantage as predictive of loss to follow-up.This study highlights the need for novel approaches to patient-centered service delivery even beyond the age of transition and resources to maintain patient engagement within the ACHD service.

Hospitalizations for alcoholic liver disease during the COVID-19 pandemic increased more for women,especially young women,compared to men

BACKGROUND Alcoholic liver disease(ALD)remains one of the major indications for liver transplantation in the United States and continues to place a burden on the national healthcare system.There is evidence of increased alcohol consumption during the coronavirus disease 2019(COVID-19)pandemic,and the effect of this on the already burdened health systems remains unknown.AIM To assess the trends for ALD admissions during the COVID-19 pandemic,and compare it to a similar pre-pandemic period.METHODS This retrospective study analyzed all admissions at a tertiary health care system,which includes four regional hospitals.ALD admissions were identified by querying a multi-hospital health system’s electronic database using ICD-10 codes.ALD admissions were compared for two one-year periods;pre-COVID-19 from April 2019 to March 2020,and during-COVID-19 from April 2020 to March 2021.Data were analyzed using a Poisson regression model and admission rates were compared using the annual quarterly average for the two time periods,with stratification by age and gender.Percent increase or decrease in admissions from the Poisson regression model were reported as incident rate ratios.RESULTS One thousand three hundred and seventy-eight admissions for ALD were included.80.7%were Caucasian,and 34.3%were female.An increase in the number of admissions for ALD during the COVID-19 pandemic was detected.Among women,a sharp rise(33%)was noted in those below the age of 50 years,and an increase of 22%in those above 50 years.Among men,an increase of 24%was seen for those below 50 years,and a 24%decrease in those above 50 years.CONCLUSION The COVID-19 pandemic has had widespread implications,and an increase in ALD admissions is just one of them.However,given that women are often prone to rapid progression of ALD,this finding has important preventive health implications.

Hepatitis B and immunosuppressive therapies for chronic inflammatory diseases: When and how to apply prophylaxis, with a special focus on corticosteroid therapy

Currently immunosuppressive and biological agentsare used in a more extensive and earlier way in patients with inflammatory bowel disease, rheumatic or dermatologic diseases. Although these drugs have shown a significant clinical benefit, the safety of these treatments is a challenge. Hepatitis B virus(HBV) reactivations have been reported widely, even including liver failure and death, and it represents a deep concern in these patients. Current guidelines recommend to preemptive therapy in patients with immunosuppressants in general, but preventive measures focused in patients with corticosteroids and inflammatory diseases are scarce. Screening for HBV infection should be done at diagnosis. The patients who test positive for hepatitis B surface antigen, but do not meet criteria for antiviral treatment must receive prophylaxis before undergoing immunosuppression, including corticosteroids at higher doses than prednisone 20 mg/d during more than two weeks. Tenofovir and entecavir are preferred than lamivudine because of their better resistance profile in long-term immunosuppressant treatments. There is not a strong evidence, to make a general recommendation on the necessity of prophylaxis therapy in patients with inflammatory diseases that are taking low doses of corticosteroids in short term basis or low systemic bioavailability corticosteroids such as budesonide or beclomethasone dipropionate. In these cases regularly HBV DNA monitoring is recommended, starting early antiviral therapy if DNA levels begin to rise. In patients with occult or resolved hepatitis the risk of reactivation is much lower, and excepting for Rituximab treatment, the prophylaxis is not necessary.

Analysis of risk factors-especially different types of plexitis-for postoperative relapse in Crohn's disease

AIM To evaluate the presence of submucosal and myenteric plexitis and its role in predicting postoperative recurrence.METHODS Data from all patients who underwent Crohn's disease(CD)-related resection at the University of Szeged, Hungary between 2004 and 2014 were analyzed retrospectively. Demographic data, smoking habits, previous resection, treatment before and after surgery, resection margins, neural fiber hyperplasia, submucosal and myenteric plexitis were evaluated as possible predictors of postoperative recurrence. Histological samples were analyzed blinded to the postoperative outcome and the clinical history of the patient. Plexitis was evaluated based on the appearance of the most severely inflamed ganglion or nerve bundle. Patients underwent regular follow-up with colonoscopy after surgery. Postoperativerecurrence was defined on the basis of endoscopic and clinical findings, and/or the need for additional surgical resection. RESULTS One hundred and four patients were enrolled in the study. Ileocecal, colonic, and small bowel resection were performed in 73.1%, 22.1% and 4.8% of the cases, respectively. Mean disease duration at the time of surgery was 6.25 years. Twenty-six patients underwent previous CD-related surgery. Forty-three point two percent of the patients were on 5-aminosalicylate, 20% on corticosteroid, 68.3% on immunomodulant, and 4% on anti-tumor necrosis factor-alpha postoperative treatment. Postoperative recurrence occurred in 61.5% of the patients; of them 39.1% had surgical recurrence. 92.2% of the recurrences developed within the first five years after the index surgery. Mean disease duration for endoscopic relapse was 2.19 years. The severity of submucosal plexitis was a predictor of the need for second surgery(OR = 1.267, 95%CI: 1.000-1.606, P = 0.050). Female gender(OR = 2.21, 95%CI: 0.98-5.00, P = 0.056), stricturing disease behavior(OR = 3.584, 95%CI: 1.344-9.559, P = 0.011), and isolated ileal localization(OR = 2.671, 95%CI: 1.033-6.910, P = 0.043) were also predictors of postoperative recurrence. No association was revealed between postoperative recurrence and smoking status, postoperative prophylactic treatment and the presence of myenteric plexitis and relapse.CONCLUSION The presence of severe submucosal plexitis with lymphocytes in the proximal resection margin is more likely to result in postoperative relapse in CD.

Unresolved conundrum of the role of physical activity in inflammatory bowel disease:What next?

There is considerable controversy on the role of physical activity in irritable bowel disease(IBD)since published reports are conflicting.It is well known that there is known relapse with specific treatment in IBD.This,in addition to onset of extraintestinal symptoms creates a need to think of alternate approaches.In this context,the current article describes the need of a multi-institutional study with standard protocol of physical activity for documenting its effect on both the primary disease and the extra alimentary manifestations.This paper also points out the possibility of using adjuvant complementary medicine such as yoga,whose effects have been documented in other diseases like irritable bowel syndrome.A third approach could be to focus on the intestinal dysbiosis in IBD and concentrate on research on restoring the microbial flora to normal,to see whether the extraintestinal symptoms are alleviated.

Addiction specialist's role in liver transplantation procedures for alcoholic liver disease

Although liver transplantation(LT) is performed increasingly for patients with end-stage alcoholic liver disease(ALD), the topic remains controversial. Traditionally, the role of an addiction specialist focused on the screening and identification of patients with a high risk on relapse in heavy alcohol use. These patients were in many cases subsequently excluded from a further LT procedure.Recently, awareness is growing that not only screening of patients but also offering treatment, helping patients regain and maintain abstinence is essential, opening up a broader role for the addiction specialist(team)within the whole of the transplant procedure. Within this context, high-risk assessment is proposed to be an indication of increasing addiction treatment intensity,instead of being an exclusion criterion. In this review we present an overview regarding the state of the art on alcohol relapse assessment and treatment in patients with alcohol use disorders, both with and without ALD.Screening, treatment and monitoring is suggested as central roles for the addiction specialist(team) integrated within transplant centers.

A systematic review of the effectiveness of clinical nurse specialist interventions in patients with chronic obstructive pulmonary disease(COPD)

Objective： This review aimed to examine the effectiveness of clinical nurse specialist （CNS） interventions in patients with chronic obstructive pulmonary disease （COPD）. COPD significantly affects people＇s health worldwide. With the development in nursing, CNSs are playing increasingly important roles in different departments. However, the studies on the effectiveness of CNSs in COPD are not as well organized as the studies on the effectiveness of CNSs in bronchiectasis and asthma. Therefore, this review aims to find some updated evidence on the CNS interventions for patients with COPD and on whether these interventions are effective.Methods： A narrative analysis of the data was performed for the eligible studies. Four databases were chosen： CINAHL, MEDLINE, British Nursing Index, and Cochrane Library. Other websites such as the National Institute for Health and Clinical Excellence, National Health Service Evidence, Association of Respiratory Nurse Specialists, and National Association of Clinical Nurse Specialist were searched as well. Two reviewers performed study identification independently, and all the retrieved articles were stored using the EndNote X7 software. The risk of bias in the included studies was assessed using the Cochrane Collaboration＇s risk of bias tool. Results： A total of nine studies were included in this review. There were five current interventions by CNSs for patients with COPD. These interventions were home nursing support, CNS]s supported discharge, multidisciplinary cooperation programs, nurse-led care programs, and self-care management education. The effectiveness of these five interventions was evaluated individually. There is low- to moderate-quality evidence indicating that home nursing support interventions may have a positive effect on mortality and quality of life. No significant difference in quality of life has been found between the CNS-supported discharge intervention and the usual service. The multidisciplinary cooperation program probably had a positive effect on quality ot life in patients with COPD. Both nurse-led care and self-care management education intervention had a positive effect on mortality of patients with COPD.Conclusions： The findings of this review provide updated evidence on the effectiveness of CNS interventions for patients with COPD. Although nine trials were included and five types of interventions were identified, there is still lack of high-quality evidence.

The role of exosomes in adult neurogenesis:implications for neurodegenerative diseases

Exosomes are cup-shaped extracellular vesicles with a lipid bilayer that is approximately 30 to 200 nm in thickness.Exosomes are widely distributed in a range of body fluids,including urine,blood,milk,and saliva.Exosomes exert biological function by transporting factors between different cells and by regulating biological pathways in recipient cells.As an important form of intercellular communication,exosomes are increasingly being investigated due to their ability to transfer bioactive molecules such as lipids,proteins,mRNAs,and microRNAs between cells,and because they can regulate physiological and pathological processes in the central nervous system.Adult neurogenesis is a multistage process by which new neurons are generated and migrate to be integrated into existing neuronal circuits.In the adult brain,neurogenesis is mainly localized in two specialized niches:the subventricular zone adjacent to the lateral ventricles and the subgranular zone of the dentate gyrus.An increasing body of evidence indicates that adult neurogenesis is tightly controlled by environmental conditions with the niches.In recent studies,exosomes released from different sources of cells were shown to play an active role in regulating neurogenesis both in vitro and in vivo,thereby participating in the progression of neurodegenerative disorders in patients and in various disease models.Here,we provide a state-of-the-art synopsis of existing research that aimed to identify the diverse components of exosome cargoes and elucidate the therapeutic potential of exosomal contents in the regulation of neurogenesis in several neurodegenerative diseases.We emphasize that exosomal cargoes could serve as a potential biomarker to monitor functional neurogenesis in adults.In addition,exosomes can also be considered as a novel therapeutic approach to treat various neurodegenerative disorders by improving endogenous neurogenesis to mitigate neuronal loss in the central nervous system.

Call for papers of the special issue on Animal Models and Infectious Diseases

Primates and animal models are major areas of coverage for Zoological Research （ZR）. Over the past few years, ZR has released a series of special issues/topics addressing various aspects of these areas, e.g., ge- netics, immunology, and physiology neuroscience. A special issue for 2017 focusing on ＂Animal Models of Infectious Diseases＂ is under preparation and, so far, includes original research articles and reviews on filo- viruses and coxsackievirus involving guinea pigs, mice, and other species. Further to this, ZR would like to extend a very warm invitation to all peer researchers in the field to submit outstanding work to the journal on this special issue.

Disparity in clinical care for patients with inflammatory bowel disease between specialists and non-specialists

Background: Although inflammatory bowel disease (IBD) patients have been increasing and new thera-peutic options for IBD have been developed, there are relatively few clinicians who specialize in IBD. Patients treated by a non-specialist of IBD may not receive appropriate treatment. This study aimed to compare disease and medication status between IBD patients treated by a specialist and those treated by a non-specialist. Methods: Medical charts of ambulating IBD patients in two hospitals were examined. All patients in one hospital were treated by one of the IBD specialists, while in the other hospital, patients were treated by one of the gastroenterologists who was a non-specialist of IBD. Results: The numbers of IBD patients were 255 (hospital with specialists) and 74 (hospital without specialists), respectively. Disease activity of the patients was not well-controlled in the hospital without specialists compared to in the hospi- tal with specialists (ulcerative colitis (UC): p = 0.0006 and Crohn’s disease: p = 0.012, respectively). The proportion of UC patients who received an insufficient dose of mesalazine (Pentasa < 3 g/day or Asacol < 3.6 g/day) was higher in the hospital without specialists (47% vs. 15%, p < 0.0001). In the hospital without specialists, more patients received long-term corticosteroids (UC: 23% vs. 5%, p < 0.0001), while fewer patients received immunomodulators (UC: 8% vs. 46%, p < 0.0001). Conclusions: IBD patients of the hospital without specialists were not well-controlled and were not prescribed appropriately with thera-peutic drugs. Fostering and placement of the specialist of IBD is an urgent problem.

Emotional Support and Well-Being of Adults with Congenital Heart Disease (ACHD): Contributions of a Specialist Nursing Service

Living with a congenital heart condition can require a daunting and uncertain patient journey during which the support of a specialist nursing service is vital. A descriptive, cross-sectional evaluation completed over two years, utilised a postal questionnaire to investigate patient’s satisfaction with aspects of service. Qualitative responses to open questions on satisfaction with emotional support (n = 103) and contributions to well-being (n = 90) were analysed using a framework approach which identified eight themes. Professional knowledge and expertise, service accessibility, caring attributes, enabling patients to cope with anxiety, depression and meeting changing needs contributed positively to both patient well-being and emotional support. Family support was influential on emotional support alone, whilst mediating medical liaison exerted an impact on well-being by enhancing feelings of security. In conclusion, the specialist nursing service contributed positively to well-being and emotional support of patients and thereby to selective aspects of continuity of care.

WJH 6^(th) Anniversary Special Issues(7): Nonalcoholic fatty liver disease Pathogenesis and therapeutic approaches for non-alcoholic fatty liver disease

Non-alcoholic fatty liver disease affects approximately one-third of the population worldwide, and its incidence continues to increase with the increasing prevalence of other metabolic disorders such as type 2 diabetes. As non-alcoholic fatty liver disease can progress to liver cirrhosis, its treatment is attracting greater attention. The pathogenesis of non-alcoholic fatty liver disease is closely associated with insulin resistance and dyslipidemia, especially hypertriglyceridemia. Increased serum levels of free fatty acid and glucose can cause oxidative stress in the liver and peripheral tissue, leading to ectopic fat accumulation, especially in the liver. In this review, we summarize the mechanism underlying the progression of hepatic steatosis to steatohepatitis and cirrhosis. We also discuss established drugs that are already being used to treat non-alcoholic fatty liver disease, in addition to newly discovered agents, with respect to their mechanisms of drug action, focusing mainly on hepatic insulin resistance. As well, we review clinical data that demonstrate the efficacy of these drugs, together with improvements in biochemical or histological parameters.

WJD 5^(th) Anniversary Special Issues(2): Type 2 diabetes Inflammation in diabetic kidney disease

Diabetes mellitus entails significant health problems worldwide.The pathogenesis of diabetes is multifactorial,resulting from interactions of both genetic and environmental factors that trigger a complex network of pathophysiological events,with metabolic and hemodynamic alterations.In this context,inflammation has emerged as a key pathophysiology mechanism.New pathogenic pathways will provide targets for prevention or future treatments.This review will focus on the implications of inflammation in diabetes mellitus,with special attention to inflammatory cytokines.

Numerical analysis of applying special pavements to solve the frost heave diseases of high-speed railway roadbeds in seasonally frozen ground regions

The Haerbin-Dalian Passenger Dedicated Line is the first high-speed railway constructed in the seasonally frozen ground regions of northeastern China. Frost heave diseases occurred in the first winter of its operation （between October 2012 and January 2013）, and frost heave was observed mainly in the roadbed fills that were considered not susceptible to frost heave. This paper proposes applying two special pavements -- black pavement and insulation-black pavement -- to improve the thermal regime of the roadbed. Three numerical models of the roadbed temperature field were built based on the field con- ditions of the Changchun section （D3K692＋840 to D3K692＋860）. The results show that： （1） Compared with cement pave- ment, black pavement and insulation-black pavement could reduce the freezing index at the roadbed surface by 37% and 64%, respectively, which could influence the maximum frozen depth; （2） the maximum frozen depths under the black pavement and insulation-black pavement were respectively 1.3-1.4 m and 1 m. Compared with cement pavement, they could reduce the maximum frozen depth by 0.4 m and 0.7-0.8 m, respectively, which would reduce the permitted amount of frost heave by 4 mm and 7-8 ram, which would meet the deformation limit established by the Code for Design on Special Subgrade of Railway; （3） the freezing periods of the black pavement and the insulation-black pavement were, respectively, approximately four months and two months. Compared with cement pavement, they could reduce the freezing period by approximately 19 days and 40 days, respectively, and delay the initial freezing time by 9 days and 18 days; and （4） compared with cement pavement, black pavement and black-insulation pavement could reduce the frozen areas of roadbeds in the cold season, which suggests that these two special pavements could provide better thermal stability for roadbeds.

WJD 5^(th) Anniversary Special Issues(2): Type 2 diabetes Type 2 diabetes and cardiovascular disease: Have all risk factors the same strength?

Diabetes mellitus is a chronic condition that occurs when the body cannot produce enough or effectively use of insulin.Compared with individuals without diabetes,patients with type 2 diabetes mellitus have a considerably higher risk of cardiovascular morbidity and mortality,and are disproportionately affected by cardiovascular disease.Most of this excess risk is it associated with an augmented prevalence of well-known risk factors such as hypertension,dyslipidaemia and obesity in these patients.However the improved cardiovascular disease in type 2 diabetes mellitus patients can not be attributed solely to the higher prevalence of traditional risk factors.Therefore other non-traditional risk factors may be important in people with type 2 diabetes mellitus.Cardiovascular disease is increased in type 2 diabetes mellitus subjects due to a complex combination of various traditional and non-traditional risk factors that have an important role to play in the beginning and the evolution of atherosclerosis over its long natural history from endothelial function to clinical events.Many of these risk factors could be common history for both di-abetes mellitus and cardiovascular disease,reinforcing the postulate that both disorders come independently from"common soil".The objective of this review is to highlight the weight of traditional and non-traditional risk factors for cardiovascular disease in the setting of type 2 diabetes mellitus and discuss their position in the pathogenesis of the excess cardiovascular disease mortality and morbidity in these patients.

Cardiovascular disease and renal insufficiency:special considerations with cardiac surgery

Cardiovascular disease is an important cause of mortality in the chronic kidney disease (CKD) population. This review discusses cardiac surgery in the CKD population and considers ostoperative acute renal failure (ARF). CKD patients have worse outcomes following coronary artery bypass grafting (CABG) and cardiac valvular surgery than the general population. However,surgical revascularization is an effective treatment for coronary artery disease (CAD) in this population and may be associated with improved survival over percutaneous intervention (PCI) in advanced CKD. Cardiac surgery in the CKD population requires careful perioperative planning and management. Acute renal failure (ARF) is a serious complication following cardiac surgery, occurring in 1 to 8% of cases. Management of postoperative ARF is largely supportive and emphasis is placed on preoperative risk stratification and prevention.

Antisense therapy:a potential breakthrough in the treatment of neurodegenerative diseases

Neurodegenerative diseases are a group of disorders characterized by the progressive degeneration of neurons in the central or peripheral nervous system.Currently,there is no cure for neurodegenerative diseases and this means a heavy burden for patients and the health system worldwide.Therefore,it is necessary to find new therapeutic approaches,and antisense therapies offer this possibility,having the great advantage of not modifying cellular genome and potentially being safer.Many preclinical and clinical studies aim to test the safety and effectiveness of antisense therapies in the treatment of neurodegenerative diseases.The objective of this review is to summarize the recent advances in the development of these new technologies to treat the most common neurodegenerative diseases,with a focus on those antisense therapies that have already received the approval of the U.S.Food and Drug Administration.

WJSC 6^(th) Anniversary Special Issues(2):Mesenchymal stem cells Intestinal stem cells and celiac disease

Stem cells(SCs)are the key to tissue genesis and regeneration.Given their central role in homeostasis,dysfunctions of the SC compartment play a pivotal role in the development of cancers,degenerative disorders,chronic inflammatory pathologies and organ failure.The gastrointestinal tract is constantly exposed to harsh mechanical and chemical conditions and most of the epithelial cells are replaced every 3 to 5 d.According to the so-called Unitarian hypothesis,this renewal is driven by a common intestinal stem cell(ISC)residing within the crypt base at the origin of the crypt-to-villus hierarchical migratory pattern.Celiac disease(CD)can be defined as a chronic immune-mediated disease that is triggered and maintained by dietary proteins(gluten)in genetically predisposed individuals.Many advances have been achieved over the last years in understanding of the pathogenic interactions among genetic,immunological and environmental factors in CD,with a particular emphasis on intestinal barrier and gut microbiota.Conversely,little is known about ISC modulation and deregulation in active celiac disease and upon a gluten-free diet.Nonetheless,bone marrow-derived SC transplantation has become an option for celiac patients with complicated or refractory disease.This manuscript summarizes the"state of the art"regarding CD and ISCs,their niche and potential role in the development and treatment of the disease.

Risk of cancer,with special reference to extra-intestinal malignancies,in patients with inflammatory bowel disease

AIM:To determine the incidence and characteristics of intestinal and extra-intestinal cancers among patients with inflammatory bowel disease in a Spanish hospital and to compare them with those of the local population.METHODS:This was a prospective,observational,7-year follow-up,cohort study.Cumulative incidence,incidence rates based on person-years of follow-up and relative risk were calculated for patients with inflammatory bowel disease and compared with the background population.The incidence of cancer was determined using a hospital-based data registry from Hospital Universitario de Fuenlabrada.Demographic data and details about time from diagnosis of inflammatory bowel disease to occurrence of cancer,disease extent,inflammatory bowel disease treatment,cancer therapy and cancer evolution were also collected in the inflammatory bowel disease cohort.RESULTS:Eighteen of 590 patients with inflammatory bowel disease developed cancer[cumulative incidence=3%(95%CI:1.58-4.52)vs 2%(95%CI:1.99-2.11)in the background population;RR=1.5;95%CI:0.97-2.29].The cancer incidence among inflammatory bowel disease patients was 0.53%(95%CI:0.32-0.84)per patient-year of follow-up.Patients with inflammatory bowel disease had a significantly increased relative risk of urothelial carcinoma(RR=5.23,95%CI:1.95-13.87),appendiceal mucinous cystadenoma(RR=36.6,95%CI:7.92-138.4),neuroendocrine carcinoma(RR=13.1,95%CI:1.82-29.7)and rectal carcinoid(RR=8.94,95%CI:1.18-59.7).Colorectal cancer cases were not found.CONCLUSION:The overall risk of cancer did not significantly increase in our inflammatory bowel disease patients.However,there was an increased risk of urinary bladder cancer and,with less statistical power,an increased risk of appendiceal mucinous cystadenoma and of neuroendocrine tumors.Colorectal cancer risk was low in our series.