Children with extended oligoarticular and polyarticular juvenile idiopathic arthritis have alterations in B and T follicular cell subsets in peripheral blood and a cytokine profile sustaining B cell activation.

OBJECTIVES: The main goal of this study was to characterise the frequency and phenotype of B, T follicular helper (Tfh) and T follicular regulatory (Tfr) cells in peripheral blood and the cytokine environment present in circulation in children with extended oligoarticular juvenile idiopathic arthritis (extended oligo JIA) and polyarticular JIA (poly JIA) when compared with healthy controls, children with persistent oligoarticular JIA (persistent oligo JIA) and adult JIA patients. METHODS: Blood samples were collected from 105 JIA patients (children and adults) and 50 age-matched healthy individuals. The frequency and phenotype of B, Tfh and Tfr cells were evaluated by flow cytometry. Serum levels of APRIL, BAFF, IL-1ß, IL-2, IL-4, IL-6, IL-10, IL-17A, IL-21, IL-22, IFN-γ, PD-1, PD-L1, sCD40L, CXCL13 and TNF were measured by multiplex bead-based immunoassay and/or ELISA in all groups included. RESULTS: The frequency of B, Tfh and Tfr cells was similar between JIA patients and controls. Children with extended oligo JIA and poly JIA, but not persistent oligo JIA, had significantly lower frequencies of plasmablasts, regulatory T cells and higher levels of Th17-like Tfh cells in circulation when compared with controls. Furthermore, APRIL, BAFF, IL-6 and IL-17A serum levels were significantly higher in paediatric extended oligo JIA and poly JIA patients when compared with controls. These immunological alterations were not found in adult JIA patients in comparison to controls. CONCLUSIONS: Our results suggest a potential role and/or activation profile of B and Th17-like Tfh cells in the pathogenesis of extended oligo JIA and poly JIA, but not persistent oligo JIA.

Efficacy of Exclusive Enteral Nutrition in Pediatric Crohn’s Disease

Introduction: Exclusive enteral nutrition (EEN) is recommended as first line therapy for mild to moderate Crohn’s disease (CD) to induce remission in pediatric patients. It involves the use of a whole protein formula given exclusively for six to eight weeks. Aims: To report the preliminary experience of a tertiary care center in Portugal, concerning the efficacy and tolerance of EEN in pediatric patients with CD. Materials and methods: Retrospective descriptive study of pediatric CD patients who received EEN as induction of remission therapy between January/2014 and June/2019. Clinical and laboratory parameters were assessed, including clinical disease activity and nutritional status before and immediately after treatment. Results: In the study period, 37 patients were diagnosed with CD; 19 were included in the study, 17/19 (89.5%) completed the EEN therapy and 16/17 (94%) achieved clinical remission. Ten patients were male, with a median (IQR) age of 14.2 years (11.8; 16.7 years). The majority of the patients had ileocolonic disease (47.4%) or ileocecal disease (42.1%) and an inflammatory behavior (78.9%). None of the patients had growth delay at diagnosis. All patients received EEN orally for six to eight weeks, 18 used polymeric formulas and one used an elemental formula. Comparing data at baseline and after treatment, significant improvements were observed in BMI Z-score (p=0.002), PCDAI score (p<0.001), erythrocyte sedimentation rate (p=0.002), C-reactive protein (p=0.003), faecal calprotectin concentration (p=0.036), and serum albumin (p=0.020). No side effects were noticed. Discussion/Conclusion: In this series, EEN therapy was associated to significant improvement of disease activity index, nutritional status, weight gain and decreased markers of inflammation in most patients. Our data are in accordance with previous observations that EEN is an effective and well tolerated treatment for the induction of remission in pediatric patients with CD. (AU)

Children Who Leave the Emergency Department Without Being Seen: Why Did They Leave and What Would Make Them Stay?

INTRODUCTION: Children who visit emergency departments and leave without being seen represent a multifactorial problem. We aimed to compare the sociodemographic characteristics of children who left and of those who did not leave, as well as to evaluate parental reasoning, subsequent use of medical care and patient outcome. MATERIAL AND METHODS: This was a prospective case-control study of a random sample of children who left without being seen and their matched controls from an emergency department during a three-month period. We performed a phone questionnaire to obtain information concerning reasons for leaving, patient outcomes and general feedback. RESULTS: During the study period, 18 200 patients presented to the emergency department, of whom 92 (0.5%) left without being seen. Fifty-five (59.8%) completed the questionnaire and there were 82 controls. The most common reasons for leaving were 'excessive waiting time' (92.7%) and 'problem could wait' (21.8%). A significantly higher number of patients who left sought further medical care (78.2% vs 11%) but they did not experience higher levels of unfavourable outcomes. DISCUSSION: The waiting time seems to be the major factor that drives the decision to leave. The fact that parents felt safe in leaving and the low level of adverse outcomes highlights the low-acuity nature of the majority of patients who leave. CONCLUSION: Reducing the waiting times may be the logical strategic mean to decrease the rates of patients who leave without being seen. However, our data seems to indicate that the concerns surrounding clinical outcome after leaving may be partly unwarranted.

Introdução: O abandono de doentes do serviço de urgência pediátrico antes da observação médica constitui um problema multifatorial. Procurámos comparar características sociodemográficas de crianças que abandonaram a urgência e das que não abandonaram, assim como avaliar os motivos, recurso subsequente a cuidados de saúde e outcome clínico. Material e Métodos: Estudo caso-controlo prospetivo de amostra aleatória de crianças que abandonaram a urgência e de controlos pareados durante um período de três meses. Foi realizado um questionário telefónico para recolha de informação relacionada com os motivos para o abandono, outcomes clínicos e opiniões gerais. Resultados: Durante o período do estudo, 18 200 doentes recorreram ao Serviço de Urgência Pediátrica, dos quais 92 (0,5%) abandonaram. Um total de 55 casos (59,8%) e 82 controlos completaram o questionário. As razões mais comuns para o abandono foram 'tempo de espera excessivo' (92,7%) e 'problema podia esperar' (21,8%). Um número significativamente superior de doentes que abandonaram recorreu subsequentemente a cuidados de saúde (78,2% vs 11%), não tendo contudo apresentado uma incidência superior de outcomes adversos. Discussão: O tempo de espera parece ser o fator prioritário que motiva a decisão de abandonar a urgência. A segurança referida pelos pais aquando da decisão e a incidência reduzida de outcomes adversos parecem reforçar a noção de que se trata de doentes com casos clínicos de baixa gravidade. Conclusão: A redução do tempo de espera parece ser a medida estratégica lógica para diminuir as taxas de abandono. No entanto, a preocupação associada ao outcome clínico após o abandono poderá ser parcialmente injustificada.