PERCUTANEOUS ENDOSCOPIC GASTROSTOMY IN CHILDREN AND ADOLESCENTS: 15-YEARS' EXPERIENCE OF A TERTIARY CENTER.

BACKGROUND: Percutaneous endoscopic gastrostomy (PEG) is an important option for enteral nutrition for both children and adults. It is considered a safe, effective, and advantageous technique in comparison to other complementary feeding routes. It allows continuous feeding, the feeding of patients with swallowing disorders due to neurological causes or others, and the administration of non-palatable diets or medications, all with low rates of complications and mortality. OBJECTIVE: This study aimed to evaluate the main indications and complications of PEG in pediatric patients. In addition, the impact on the nutritional status of patients undergoing PEG was also compared with weight, body mass index (BMI), and height according to references from the World Health Organization. METHODS: This observational and retrospective study included 152 children and adolescents who underwent PEG between January/2003 and December/2018. Patients up to 18 years of age at the time of the procedure were included. Complications related to the procedure were classified as minor or major. Patients with PEG indication for nutritional supplementation were evaluated for weight gain, height, and BMI, using the Z score at the day of the procedure and six months, 1 year, and 2 years after the procedure. RESULTS: Indications for PEG were: swallowing disorder of neurological cause (67.1%), need for nutritional supplementation (25%), swallowing disorder of mechanical origin (6.6%), and indication of gastric decompression (1.3%). Minor complications occurred in 57.8% of patients and major complications in 9.8% of patients. The traction technique corresponded to 92.1% and puncture to 7.9%. The death rate was 1.3%. Thirty-eight patients had an indication for nutritional supplementation. In these patients, there was a gradual increase in both BMI and weight, reaching statistically significant differences (P=0.0340 and P= 0.0105, respectively). These differences were more evident in chronic renal disease patients. Height did not vary significantly (P=0.543). CONCLUSION: PEG proved to be an advantageous option as an auxiliary feeding method in pediatric patients. Dysphagia of neurological origin was the main indication followed by the need for nutritional supplementation. PEG has low frequency of major complications and mortality. This study also showed the importance of PEG in patients who need nutritional supplementation, as it enabled patients to move from undernutrition to normal weight ranges.

Gastrostomia endoscópica percutânea em crianças e adolescentes: 15 anos de experiência em um hospital terciário / Percutaneous endoscopic gastrostomy in children and adolescents: 15-years' experience of a tertiary center

ABSTRACT BACKGROUND: Percutaneous endoscopic gastrostomy (PEG) is an important option for enteral nutrition for both children and adults. It is considered a safe, effective, and advantageous technique in comparison to other complementary feeding routes. It allows continuous feeding, the feeding of patients with swallowing disorders due to neurological causes or others, and the administration of non-palatable diets or medications, all with low rates of complications and mortality. OBJECTIVE: This study aimed to evaluate the main indications and complications of PEG in pediatric patients. In addition, the impact on the nutritional status of patients undergoing PEG was also compared with weight, body mass index (BMI), and height according to references from the World Health Organization. METHODS: This observational and retrospective study included 152 children and adolescents who underwent PEG between January/2003 and December/2018. Patients up to 18 years of age at the time of the procedure were included. Complications related to the procedure were classified as minor or major. Patients with PEG indication for nutritional supplementation were evaluated for weight gain, height, and BMI, using the Z score at the day of the procedure and six months, 1 year, and 2 years after the procedure. RESULTS: Indications for PEG were: swallowing disorder of neurological cause (67.1%), need for nutritional supplementation (25%), swallowing disorder of mechanical origin (6.6%), and indication of gastric decompression (1.3%). Minor complications occurred in 57.8% of patients and major complications in 9.8% of patients. The traction technique corresponded to 92.1% and puncture to 7.9%. The death rate was 1.3%. Thirty-eight patients had an indication for nutritional supplementation. In these patients, there was a gradual increase in both BMI and weight, reaching statistically significant differences (P=0.0340 and P= 0.0105, respectively). These differences were more evident in chronic renal disease patients. Height did not vary significantly (P=0.543). CONCLUSION: PEG proved to be an advantageous option as an auxiliary feeding method in pediatric patients. Dysphagia of neurological origin was the main indication followed by the need for nutritional supplementation. PEG has low frequency of major complications and mortality. This study also showed the importance of PEG in patients who need nutritional supplementation, as it enabled patients to move from undernutrition to normal weight ranges.

RESUMO CONTEXTO: A gastrostomia endoscópica percutânea (GEP) é uma importante opção de nutrição enteral para crianças e adultos, sendo considerada uma técnica segura, eficaz e vantajosa em comparação às outras vias de alimentação complementar. Permite a alimentação contínua, a alimentação em pacientes com distúrbios de deglutição de causa neurológica ou outros, a administração de dietas ou medicamentos não palatáveis, todos com baixos índices de complicações e mortalidade. OBJETIVO: Avaliar as principais indicações e complicações de pacientes pediátricos submetidos à GEP e o impacto no estado nutricional de pacientes submetidos à GEP para suplementação nutricional, comparando peso, índice de massa corporal (IMC) e estatura com referências da Organização Mundial de Saúde. MÉTODOS: Estudo observacional e retrospectivo de 152 crianças e adolescentes submetidos à GEP, no período de janeiro/2003 a dezembro/2018. Foram incluídos pacientes até 18 anos de idade na época do procedimento. As complicações relacionadas ao procedimento foram divididas em menores e maiores. Pacientes com indicação de GEP para suplementação nutricional foram avaliados quanto ao ganho de peso, altura e IMC, por meio do escore Z no dia do procedimento e 6 meses; 1 ano; e 2 anos após o procedimento. RESULTADOS: As indicações para GEP foram distúrbio de deglutição de causa neurológica (67,1%), necessidade de suplementação nutricional (25%), distúrbio de deglutição de origem mecânica (6,6%), e indicação de descompressão gástrica (1,3%). Complicações menores ocorreram em 57,8% dos pacientes e complicações maiores em 9,8%. A técnica de tração correspondeu a 92,1% e a punção, 7,9%. A taxa de mortalidade foi de 1,3%. Trinta e oito pacientes tinham indicação de suplementação nutricional. Nestes, houve aumento gradativo tanto do IMC quanto do peso, com variação estatisticamente significativa da mediana P=0,0340 e P=0,0105, respectivamente, mais evidente nos pacientes renais crônicos. A altura não variou significativamente (P=0,543). CONCLUSÃO: A GEP mostrou-se uma opção vantajosa como forma auxiliar de alimentação em pacientes pediátricos, tendo como principais indicações a disfagia de causa neurológica e a necessidade de suplementação nutricional, com baixa prevalência de complicações maiores e mortalidade. Este estudo também mostrou a importância da GEP em pacientes com necessidade de suplementação nutricional, possibilitando a passagem dos pacientes desnutridos para escores nutricionais de peso adequados à idade.

Non-invasive Predictors of Esophageal Varices With a High Risk of Bleeding in Pediatric Cirrhotic Patients.

OBJECTIVES: To evaluate non-invasive predictive factors of varices with a high risk of bleeding in pediatric cirrhotic patients. METHODS: This retrospective, cross-sectional study included data from 158 children with cirrhosis, median age of 5.38 years (interquartile [IQ] 2.08-11.52 years), and no history of upper gastrointestinal bleeding. Patients underwent an endoscopy to screen for esophageal varices. Varices with a high risk of bleeding were defined as those with a medium to large caliber, presence of red spots, or the presence of gastric varices and identified as high-risk varices (HRV). Laboratory and clinical factors were evaluated as possible predictors of HRV. RESULTS: HRV were detected in 30 children (19%) after the first endoscopy. In the multivariate analysis, only the risk score (RS), as described by Park et al, and the aspartate aminotransferase-to-platelet ratio index (APRi) were predictive of HRV. The best non-invasive predictor of HRV was the RS with an area under the receiver operating characteristic curve of 0.764. When used a cut-off point of -1.2, the sensitivity of the RS was 90% and specificity was 53%. The use of RS or APRi correctly identified 96% of children with HRV. CONCLUSIONS: The described predictors allow the correct identification of patients with HRV. The association of RS >-1.2 or APRi >1.4 has a good sensitivity to identify HRV and to prevent unnecessary endoscopy in about one-third of children with no HRV.

Endoscopic prophylaxis and factors associated with bleeding in children with extrahepatic portal vein obstruction.

OBJECTIVES: This study aimed to evaluate factors associated with upper digestive hemorrhage and primary and secondary endoscopic prophylaxis outcomes in children with extrahepatic portal vein obstruction. METHODS: This observational and prospective study included 72 children with extrahepatic portal vein obstruction who were followed from 2005 to 2017. Risk factors associated with upper digestive hemorrhage and the results of primary and secondary prophylaxis of these patients were evaluated. RESULTS: Fifty patients (69.4%) had one or more episodes of bleeding during follow-up, with a median age at first hemorrhage of 4.81 years. The multivariate analysis showed that medium- to large-caliber esophageal varices were associated with an 18-fold risk of upper digestive hemorrhage (95% CI: 4.33-74.76; p < 0.0001). Primary prophylaxis was administered to 14 patients, with eradication in 85.7%; however, 14.3% of these patients had hemorrhages during the follow-up period and 41.7% had a relapse of varices. Secondary prophylaxis was administered to 41 patients. Esophageal varices were eradicated in 90.2% of patients. There were relapse and re-bleeding of esophageal varices in 45.9% and 34.1% of the children, respectively. CONCLUSION: Primary and secondary endoscopic prophylaxes showed high rates of esophageal varix eradication, but with significant relapses. Eradication of esophageal varices cannot definitively prevent recurrent upper digestive hemorrhage, since bleeding from alternate sites can occur. Medium- and large-caliber esophageal varices were associated with upper digestive hemorrhage in patients with extrahepatic portal vein obstruction. To the best of the authors' knowledge, this study is the first to evaluate bleeding risk factors in children with extrahepatic portal vein obstruction.

Evaluation of endoscopic secondary prophylaxis in children and adolescents with esophageal varices / Avaliação da profilaxia secundária endoscópica em crianças e adolescentes com varizes de esôfago

ABSTRACT BACKGROUND Bleeding of esophageal varices is the main cause of morbidity and mortality in children and adults with portal hypertension and there are few studies involving secondary prophylaxis in children and adolescents. OBJECTIVE To evaluate the efficacy of endoscopic secondary prophylaxis in prevention of upper gastrointestinal bleeding in children and adolescents with esophageal varices. METHODS This is a prospective analysis of 85 patients less than 18 years of age with or without cirrhosis, with portal hypertension. Participants underwent endoscopic secondary prophylaxis with sclerotherapy or band ligation. Eradication of varices, incidence of rebleeding, number of endoscopic sessions required for eradication, incidence of developing gastric fundus varices and portal hypertensive gastropathy were evaluated. RESULTS Band ligation was performed in 34 (40%) patients and sclerotherapy in 51 (60%) patients. Esophageal varices were eradicated in 81.2%, after a median of four endoscopic sessions. Varices relapsed in 38 (55.1%) patients. Thirty-six (42.3%) patients experienced rebleeding, and it was more prevalent in the group that received sclerotherapy. Gastric varices and portal hypertensive gastropathy developed in 38.7% and 57.9% of patients, respectively. Patients undergoing band ligation showed lower rebleeding rates (26.5% vs 52.9%) and fewer sessions required for eradication of esophageal varices (3.5 vs 5). CONCLUSION Secondary prophylaxis was effective in eradicating esophageal varices and controlling new upper gastrointestinal bleeding episodes due to the rupture of esophageal varices. Band ligation seems that resulted in lower rebleeding rates and fewer sessions required to eradicate varices than did sclerotherapy.

RESUMO CONTEXTO Os episódios de sangramento das varizes esofágicas são a principal causa de morbidade e mortalidade em crianças e adultos com hipertensão porta e poucos são os estudos envolvendo a profilaxia secundária em crianças e adolescentes. OBJETIVO Avaliar a eficácia da profilaxia endoscópica secundária na prevenção de hemorragia digestiva alta em crianças e adolescentes com varizes de esôfago. MÉTODOS Estudo prospectivo com 85 pacientes menores de 18 anos com hipertensão porta, cirróticos e não cirróticos. A profilaxia secundária endoscópica foi realizada através de ligadura elástica ou escleroterapia. Foram avaliadas erradicação de varizes, incidência de ressangramento, número de sessões endoscópicas necessárias para a erradicação, incidência de surgimento de varizes gástricas e da gastropatia da hipertensão porta. RESULTADOS Ligadura elástica foi realizada em 34 (40%) pacientes e escleroterapia em 51 (60%). As varizes de esôfago foram erradicadas em 81,2% após mediana de quatro sessões endoscópicas. Foi observada recidiva de varizes de esôfago em 38 (55,1%) pacientes. Ressangramento por ruptura de varizes de esôfago ocorreu em 36 (42,3%) pacientes e foi mais prevalente no grupo submetido à escleroterapia. O surgimento de varizes gástricas e gastropatia da hipertensão porta ocorreram em 38,7% e 57,9% respectivamente. Os pacientes submetidos à ligadura elástica apresentaram taxas menores de ressangramento (26,5% vs 52,9%) e número menor de sessões necessárias para erradicação das varizes de esôfago (3,5 vs 5). CONCLUSÃO A profilaxia secundária endoscópica mostrou-se eficaz para erradicação de varizes de esôfago e evitar novos episódios de hemorragia digestiva alta secundária à ruptura de varizes de esôfago. A ligadura elástica endoscópica provavelmente apresenta menores taxas de ressangramento e número menor de sessões necessárias para erradicação das varizes de esôfago, quando comparada à escleroterapia.

Evaluation of endoscopic secondary prophylaxis in children and adolescents with esophageal varices.

BACKGROUND: - Bleeding of esophageal varices is the main cause of morbidity and mortality in children and adults with portal hypertension and there are few studies involving secondary prophylaxis in children and adolescents. OBJECTIVE: - To evaluate the efficacy of endoscopic secondary prophylaxis in prevention of upper gastrointestinal bleeding in children and adolescents with esophageal varices. METHODS: - This is a prospective analysis of 85 patients less than 18 years of age with or without cirrhosis, with portal hypertension. Participants underwent endoscopic secondary prophylaxis with sclerotherapy or band ligation. Eradication of varices, incidence of rebleeding, number of endoscopic sessions required for eradication, incidence of developing gastric fundus varices and portal hypertensive gastropathy were evaluated. RESULTS: - Band ligation was performed in 34 (40%) patients and sclerotherapy in 51 (60%) patients. Esophageal varices were eradicated in 81.2%, after a median of four endoscopic sessions. Varices relapsed in 38 (55.1%) patients. Thirty-six (42.3%) patients experienced rebleeding, and it was more prevalent in the group that received sclerotherapy. Gastric varices and portal hypertensive gastropathy developed in 38.7% and 57.9% of patients, respectively. Patients undergoing band ligation showed lower rebleeding rates (26.5% vs 52.9%) and fewer sessions required for eradication of esophageal varices (3.5 vs 5). CONCLUSION: - Secondary prophylaxis was effective in eradicating esophageal varices and controlling new upper gastrointestinal bleeding episodes due to the rupture of esophageal varices. Band ligation seems that resulted in lower rebleeding rates and fewer sessions required to eradicate varices than did sclerotherapy.

Dental Erosion in Brazilian Children with Gastroesophageal Reflux Disease

To evaluate the occurrence of dental erosion (DE) in children with gastroesophageal reflux disease (GERD) and to analyse its association with diet, oral hygiene, socio-demographic characteristics and medical history.Material and Methods:The study sample consisted of43 children (2-14 years) with a positive diagnosis of GERD after 24-hour pH monitoring. Dental erosion was assessed by one trained examiner using the O'Sullivan index. A questionnaire was completed by parents, which provided information on dietary habits, oral hygiene, socio-demographics and medical history of the children. Data analysis was performed using a chi-square test and Poisson regression (p <0.05).Results:Dental erosion was diagnosed in 25.6% (N=11) of children. The most affected surfaces werethe palatal and incisal (62.1%, N=18). Socio-demographic characteristics and dietary habits were not associated with dental erosion occurrence. The regression model showed that children who used adult toothpaste (PR 4.98, 95% CI 1.34 -18.51) and asthma medication (PR 3.65, 95% CI 1.24 -10.70) had a higher risk of dental erosion.Conclusion:Dental erosion in children with GERD was associated with the use of adult toothpaste and asthma medication...

Th1 immune response to H. pylori infection varies according to the age of the patients and influences the gastric inflammatory patterns.

To compare children and adults in respect to the effect of H. pylori infection on the gastric concentrations of cytokines linked to innate and Th1 immune response, as well as to investigate the changes in the gastric concentrations of the studied cytokines according to the age. We studied 245 children (142 H. pylori-negative and 103 H. pylori-positive) and 140 adults (40 H. pylori-negative and 100 H. pylori-positive). The gastric concentrations of cytokines representative of the innate and Th1 response were higher in the H. pylori-positive than in the -negative children and adults. The gastric concentrations of IL-1α and TNF-α were significantly higher, while those of IL-2, IL-12p70 and IFN-γ were lower in the infected children than in the infected adults. In the infected children, the gastric concentration of IL-1α, IL-2, IL-12p70 and IFN-γ increased, whereas in adults, the gastric concentrations of IFN-γ and IL-12p70 decreased with the aging. Increased gastric concentration of Th1 associated cytokines correlated with increased degree of gastritis that is the background lesion for the development of the H. pylori associated severe diseases. Concluding, Th1 response to H. pylori infection varies according to the age and seems to have determinant implication in the H. pylori infection outcomes.

Iron status and Helicobacter pylori infection in symptomatic children: an international multi-centered study.

OBJECTIVE: Iron deficiency (ID) and iron deficiency anaemia (IDA) are global major public health problems, particularly in developing countries. Whilst an association between H. pylori infection and ID/IDA has been proposed in the literature, currently there is no consensus. We studied the effects of H. pylori infection on ID/IDA in a cohort of children undergoing upper gastrointestinal endoscopy for upper abdominal pain in two developing and one developed country. METHODS: In total 311 children (mean age 10.7±3.2 years) from Latin America--Belo Horizonte/Brazil (n = 125), Santiago/Chile (n = 105)--and London/UK (n = 81), were studied. Gastric and duodenal biopsies were obtained for evaluation of histology and H. pylori status and blood samples for parameters of ID/IDA. RESULTS: The prevalence of H. pylori infection was 27.7% being significantly higher (p<0.001) in Latin America (35%) than in UK (7%). Multiple linear regression models revealed H. pylori infection as a significant predictor of low ferritin and haemoglobin concentrations in children from Latin-America. A negative correlation was observed between MCV (r = -0.26; p = 0.01) and MCH (r = -0.27; p = 0.01) values and the degree of antral chronic inflammation, and between MCH and the degree of corpus chronic (r = -0.29, p = 0.008) and active (r = -0.27, p = 0.002) inflammation. CONCLUSIONS: This study demonstrates that H. pylori infection in children influences the serum ferritin and haemoglobin concentrations, markers of early depletion of iron stores and anaemia respectively.

Increased gastric IL-1ß concentration and iron deficiency parameters in H. pylori infected children.

Association between H. pylori infection, iron deficiency and iron deficiency anaemia has been described, but the mechanisms involved have not been established. We hypothesized that in H. pylori infected children increased gastric concentrations of IL-1ß and/or TNF-α, both potent inhibitors of gastric acid secretion that is essential for iron absorption, are predictors for low blood concentrations of ferritin and haemoglobin, markers of early depletion of iron stores and anaemia, respectively. We evaluated 125 children undergoing endoscopy to clarify the origin of gastrointestinal symptoms. Gastric specimens were obtained for H. pylori status and cytokine evaluation and blood samples for determination of iron deficiency/iron deficiency anaemia parameters and IL1 cluster and TNFA polymorphisms that are associated with increased cytokine secretions. Higher IL-1ß and TNF-α gastric concentrations were observed in H. pylori-positive (n = 47) than in -negative (n = 78) children. Multiple linear regression models revealed gastric IL-1ß, but not TNF-α, as a significant predictor of low ferritin and haemoglobin concentrations; results were reproduced in young children in whom IL1RN polymorphic genotypes associated with higher gastric IL-1ß expression and lower blood ferritin and haemoglobin concentrations. In conclusion, high gastric levels of IL-1ß can be the link between H. pylori infection and iron deficiency/iron deficiency anaemia in childhood.

Endoscopic and pharmacological secondary prophylaxis in children and adolescents with esophageal varices.

OBJECTIVE: The aim of this study was to describe the results of endoscopic secondary prophylaxis, alone or in combination with propranolol, used to prevent upper gastrointestinal bleeding (UGIB) in children and adolescents with esophageal varices. METHODS: This observational study followed 43 patients younger than 18 years who received secondary prophylaxis between August 2001 and December 2009. Sclerotherapy and/or band ligation were performed, and propranolol was used when no contraindications were present. The rebleeding rate, number of endoscopic sessions required for variceal eradication, rate of varix recurrence, the occurrence of varices at the gastric fundus, and the occurrence of portal hypertensive gastropathy were evaluated. RESULTS: Endoscopic prophylaxis in combination with propranolol was performed in 25 patients (58.1%) and endoscopic prophylaxis alone was performed in 18 patients (41.9%). Esophageal varices were eradicated in all of the patients after a median of 3 sessions. Varices recurred in 22 patients (51.2%). Rebleeding occurred in 13 patients (30.2%). Fundal varices and portal hypertensive gastropathy developed in 31% and 61.9% of patients, respectively. No deaths related to the endoscopic procedure or UGIB occurred. No statistically significant differences in any of the studied variables were observed when comparing endoscopic prophylaxis with propranolol and endoscopic prophylaxis alone. CONCLUSIONS: No significant differences were observed between sclerotherapy and band ligation. Secondary prophylaxis was effective in eradicating esophageal varices. The use of propranolol did not affect the results of the endoscopic prophylaxis. Furthermore, randomized studies will be necessary to assess the best form of prevention during childhood.

A regulatory instead of an IL-17 T response predominates in Helicobacter pylori-associated gastritis in children.

Th17 cells seem to have an important role in the efficacy of vaccines against Helicobacter pylori. Because children are a target group for human vaccination and Th17/T(reg) cells have intrinsically linked and antagonic commitments, we compared the gastric levels of Th17- and T(reg)-associated cytokines of children and adults. IL-6, IL-10 and TGF-ß1 levels and Foxp3(+) cell numbers were higher, but IL-1ß, IL-17A and IL-23 were lower in infected children than in infected adults. In conclusion T(reg) instead of Th17 cell response to H. pylori-infection predominates in children.

Trinta anos de gastrostomia endoscópica percutânea: uma revisão da literatura / Thirty years of percutaneous endoscopic gastrostomy: A review of literature

Há trinta anos, Gauderer, cirurgião-pediatra, e Ponsky, endoscopista-pediatra, desenvolveram a gastrostomia endoscópica percutânea (GEP). A GEP apresenta como princípio a aproximação do estômago à parede abdominal, sem necessidade de sutura ou laparotomia, com a criação de uma abertura artificial no estômago. Ela tem se demonstrado método simples, seguro e efetivo de nutrição enteral por acesso gástrico e apresenta vantagens como baixo custo, menos tempo de hospitalização e menos morbidade quando comparada à gastrostomia tradicional. Tem sido amplamente utilizada na infância, principalmente em crianças com comprometimento neurológico e com impedimento à alimentação por via oral e como via de suplementação alimentarem doenças crônicas e debilitantes. As principais contraindicações incluem hipo albuminemia e distúrbios de coagulação. A antibiótico profilaxia com cefazolina uma hora antes do procedimento é obrigatória. A mais utilizada é a técnica pull (Gauderer e Ponsky) devido à sua simplicidade e segurança. As complicações da GEP são divididas em maiores e menores, sendo as últimas as mais comuns. É essencial que pacientes e familiares sejam bem-orientados sobre o procedimento...

Thirty years ago, Gauderer, a pediatric surgeon, and Ponsky, a pediatric endoscopist, developed percutaneous endoscopic gastrostomy (PEG). PEG is based on approximationof the stomach to the abdominal wall without the need of suture or laparotomy, creatingan artificial opening in the stomach. PEG has proven to be a simple, safe and effective enteral nutrition method by gastric access, providing advantages such as low cost, withshorter hospitalization and morbidity when compared to traditional gastrostomy. PEGhas been widely used in childhood, especially in children with neurological impairment that are unable to be orally fed and as form of supplementation in chronic and debilitating diseases. Major contraindications include hypoa lbuminemia and coagulation disorders. Antibiotic propylaxis with cefazolin an hour before the procedure is mandatory. Themost used technique is pull technique (Ponsky and Gauderer) due to its simplicity andsafety. Complications of PEG are divided into major and minor, the latter being the most common. It is essential that patients and families are well informed about the procedure...

Helicobacter pylori na infância: particularidades clínicas e terapêuticas da infecção em crianças e adolescentes / Helicobacter pylori infection in Children: clinical features and treatment of infection in children and adolescents

A infecção pelo H. pylori é frequente em todo o mundo e atinge, em determinadas localidades, até 90% da população adulta. A forma de contágio relaciona-se a condições inadequadas de saneamento e as manifestaçoes clíncas são inespecíficas. O diagnóstico e o tratamento têm importância, pela possibilidade de complicações associadas. Este estudo apresenta características da infecção em crianças e adolescentes atendidos no Ambulatório de Gastroenterologia Pediátrica do Hospital das Clínicas da UFMG.

Toll-like receptor (TLR2, TLR4 and TLR5) gene polymorphisms and Helicobacter pylori infection in children with and without duodenal ulcer.

Helicobacter pylori infection is mainly acquired in childhood, and polymorphisms in the host genes coding for Toll-like receptors (TLRs) may influence the innate and adaptive immune response to the infection, affecting the susceptibility to H. pylori or the disease outcomes. Our aim was to investigate whether TLR4, TLR2, and TLR5 polymorphisms were associated with H. pylori susceptibility and risk for duodenal ulcer in children. Gastric biopsy specimens were obtained at endoscopy for evaluation of H. pylori status, TLR4, TLR2 and TLR5 polymorphisms from 486 children (254 H. pylori-negative and 232 H. pylori-positive: 72 with and 160 without duodenal ulcer). cagA status of H. pylori infection was investigated by PCR. The levels of gastric cytokines were detected by ELISA. H. pylori-positivity or duodenal ulcer were not associated with TLR2, TLR4 or TLR5 polymorphisms. Otherwise, the presence of TLR4 polymorphic allele was associated with infection by cagA-positive strains and with increased gastric levels of interleukin-8 and interleukin-10. TLR4 polymorphism might ultimately contribute to more severe consequences of the infection in adulthood since it was associated with susceptibility to cagA-positive H. pylori infection early in life.

Clinical and laboratory predictors of esophageal varices in children and adolescents with portal hypertension syndrome.

OBJECTIVES: To determine the clinical and laboratory parameters that may predict the presence of esophageal varices in children and adolescents with portal hypertension. PATIENTS AND METHODS: Overall, 111 patients with portal hypertension and no previous history of digestive bleeding underwent esophagogastroduodenoscopy for detection of esophageal varices. A univariate analysis initially was carried out, followed by a logistic regression analysis to identify the independent variables associated with the presence of esophageal varices. Sensitivity and specificity rates, positive predictive value, negative predictive value, and the accuracy of the predictive variables identified among cirrhotic patients were calculated with the esophagogastroduodenoscopy as the reference test. RESULTS: Sixty percent of patients had esophageal varices on the first esophagogastroduodenoscopy. Patients with portal vein thrombosis and congenital hepatic fibrosis were 6.15-fold more likely to have esophageal varices than cirrhotic patients. When we analyzed 85 cirrhotic patients alone, splenomegaly and hypoalbuminemia remained significant indicators of esophageal varices. Only spleen enlargement showed appropriate sensitivity and negative predictive value (97.7% and 91.7%, respectively) to be used as a screening test for esophageal varices among cirrhotic patients. CONCLUSIONS: In reference services and research protocols, endoscopic screening should be performed in all patients with portal vein thrombosis and congenital hepatic fibrosis. Among cirrhotic patients, the indication should be conditioned to clinical evidence of splenomegaly or hypoalbuminemia. For clinicians, the recommendation is to emphasize the orientations given to guardians of patients with portal vein thrombosis and congenital hepatic fibrosis as to the risk of digestive bleeding. Cirrhotic patients with hypoalbuminemia and splenomegaly should receive the same orientations.

Evolução clínica e tratamento da esofagite de refluxo crônica em crianças e adolescentes / Clinical evolution and treatment of chronic reflux esophagitis in children and adolescents

Objetivos: Determinar a eficácia do omeprazol na cicatrização das lesões esofágicas e o valor da monitoração do pH esofágico no acompanhamento terapêutico da esofagite de refluxo crônica em crianças e adolescentes. Pacientes e Métodos: Foram estudados 14 pacientes com esofagite de refluxo erosiva e/ou ulcerada entre um e 14 anos, que receberam omeprazol em dose inicial de 0,7mg/Kg/dia até o máximo de 3,7mg/Kg/dia. A dose de cicatrização correspondia à dose obtida com a normalização do pH esofágico. Endoscopia de controle foi realizada ao final do tratamento. Resultados: A dose de omeprazol variou de 0,7 a 3,7mg/Kg/dia. Dez pacientes apresentaram cicatrização das lesões esofágicas e melhora sintomática ao final do estudo. Os parâmetros da pHmetria esofágica que melhor traduziram a resolução da esofagite foram o número de episódios de refluxo com duração acima de cinco minutos, o escore de DeMeester, o índice de refluxo e o número total de episódios de refluxo. Conclusões: o omeprazol foi eficaz na remissão sintomática e na cicatrização das lesões da esofagite de refluxo crônica em crianças e adolescentes. As doses apresentaram ampla variação e foram proporcionalmente mais altas que as empregadas em adultos. A monitoração clínica do tratamento através da pHmetria esofágica é recomendada.

Endoscopic dilatation of esophageal strictures in children and adolescents.

OBJECTIVE: To assess the causes of esophageal stricture in pediatric patients and their response to endoscopic dilatation. METHODS: Retrospective analysis of clinical and endoscopic data obtained from children and adolescents with esophageal stricture submitted to endoscopic dilatation between July 1993 and January 2003. RESULTS: A total of 125 patients aged between 1 month and 16 years were included in the study. Among the types of stenosis, postoperative (43.2%), corrosive (27.2%) and peptic (21.6%) strictures were the most prevalent. Those patients with corrosive esophageal stricture needed more dilatation sessions. Five cases of esophageal perforation and one case of hemorrhage occurred due to complications during the procedure. Good response to endoscopic treatment was described in 74.4% of cases, but better results were obtained from patients with peptic esophageal stricture. CONCLUSIONS: Endoscopic treatment of esophageal strictures in children and adolescents yields good results and has a low rate of complications. Corrosive esophageal strictures have a higher morbidity and require more dilatation sessions.

Endoscopic dilatation of esophageal strictures in children and adolescents

OBJECTIVE: To assess the causes of esophageal stricture in pediatric patients and their response to endoscopic dilatation.METHODS: Retrospective analysis of clinical and endoscopic data obtained from children and adolescents with esophageal stricture submitted to endoscopic dilatation between July 1993 and January 2003.OBJECTIVE: To assess the causes of esophageal stricture in pediatric patients and their response to endoscopic dilatation.METHODS: Retrospective analysis of clinical and endoscopic data obtained from children and adolescents with esophageal stricture submitted to endoscopic dilatation between July 1993 and January 2003.RESULTS: A total of 125 patients aged between 1 month and 16 years were included in the study. Among the types of stenosis, postoperative (43.2%), corrosive (27.2%) and peptic (21.6%) strictures were the most prevalent. Those patients with corrosive esophageal stricture needed more dilatation sessions. Five cases of esophageal perforation and one case of hemorrhage occurred due to complications during the procedure. Good response to endoscopic treatment was described in 74.4% of cases, but better results were obtained from patients with peptic esophageal stricture.CONCLUSIONS: Endoscopic treatment of esophageal strictures in children and adolescents yields good results and has a low rate of complications. Corrosive esophageal strictures have a higher morbidity and require more dilatation sessions.

Aspectos atuais da abordagem da esofagite de refluxo complicada em crianças e adolescentes / Management of severe reflux esophagitis in children: current aspects

A esofagite é uma das principais complicações da doença do refluxo gastroesofágico (DRGE) em crianças e adolescentes e, quanto maior sua gravidade, maior a dificuldade de tratamento. O relaxamento transitório e inadequado do esfíncter esofágico infe- rior é o principal mecanismo etiopatogênico da DRGE e a presença de ácido é fator essencial para a ocorrência das lesões esofágicas. O surgimento dos inibidores de bomba de prótons (IBP) revolucionou o tratamento das doenças cloridopépticas e a supressão farmacológica da secreção ácida gástrica com estas drogas passou a ser a terapêutica de escolha para a esofagite de refluxo. Os achados endoscópicos de erosões e/ou ulcerações na mucosa esofágica caracterizam esofagite de refluxo complicada, cujo tratamento torna-se mais complexo, em virtude da dificulda- de de cicatrização das lesões, maior risco de complicações, pequena resposta ao uso dos antagonistas dos receptores H2 da histamina e necessidade de manutenção a longo prazo para evitar recidiva da doença. Embora o omeprazol seja usado há mais de 15 anos na população pediátrica, ainda há escassez de dados na literatura quanto ao manejo ideal da esofagite péptica complicada e quanto à dose efetiva desta droga para uso nestes pacientes. Estudos pediátricos, até o momento, mostram ampla varia- ção da dose do omeprazol e sugerem monitoração mais precisa do tratamento clínico da esofagite de refluxo infantil, principal- mente através da pHmetria esofágica de 24 horas. A cirurgia anti- refluxo apresenta altas taxas de morbidade e insucesso após o procedimento e deve ser reservada somente para os casos refra- tários ao tratamento clínico otimizado.

Esophagitis is the main complication of gastroesophageal reflux disease (GERO) in children and the treatment is very difficult. Transient relaxations of lower esophageal sphincter are the princi- pal ethyopathogenic mechanism of GERO, with acid as one of the factors that takes to esophageal erosions. The blockage of gastric acid secretion by proton pump inhibitors (PPI) revolutionized the treatment of peptic esophagitis and becomes the therapy of choice. Endoscopic features of esophageal erosions and ulcerations characterize severe reflux esophagitis and the management may be more oriented because of severe grades of esophageal lesions, poor outcome, no response to H2-receptor antagonists and prolonged use of PPI. Oespite of omeprazole use for more than 15 years in pediatric population, there are few data about the ideal management for severe reflux esophagitis and about the effective omeprazole dosage in children. Pediatric studies show wide variation of the omeprazole dosage and recommend optimized medical therapy, including continuous esophageal pH monitoring. Antireflux surgery is attended by a high morbidity and failure rate and remain the treatment of choice only for refractory cases.