RACIONAL: Identificação de fatores de risco epidemiológicos no esôfago de Barrett resultando em displasia e adenocarcinoma e seu impacto na prevenção e detecção precoce. OBJETIVOS: Avaliar fatores de risco epidemiológicos envolvidos no desenvolvimento de displasia e adenocarcinoma a partir do Barrett em população específica. Realizar análise crítica do período de vigilância, objetivando individualizar o tempo de seguimento conforme riscos identificados. MÉTODOS: Estudo caso-controle retrospectivo em centro terciário com pacientes com esôfago de Barrett diagnosticados e seguidos neste centro. Pacientes com Barrett que apresentaram adenocarcinoma e/ou displasia foram comparados aos que não apresentaram, levando em consideração as variáveis sexo, idade, tabagismo, IMC, etnia e extensão do Barrett. Posteriormente, foi realizada regressão logística para mensuração da razão de chances entre fatores de risco para o desfecho adenocarcinoma e desfecho displasia. Foi correlacionada a presença de fatores epidemiológicos de risco nessa população com o tempo de desenvolvimento de adenocarcinoma a partir da metaplasia. RESULTADOS: Houve diferença estatisticamente significante entre as variáveis tabagismo, raça, sexo, extensão do Barrett e idade no grupo com adenocarcinoma em relação ao sem adenocarcinoma; tabagistas e ex-tabagistas apresentaram risco 4,309 vezes maior de desenvolver adenocarcinoma; a extensão do Barrett aumentou o risco em 1,193 vezes a cada centímetro. No grupo com displasia, as variáveis tabagismo, extensão do Barrett e idade se mostraram significantes estatisticamente; extensão do Barrett aumentou 1,128 vezes a cada centímetro o risco de displasia e idade aumentou 1,023 a cada ano o risco desse desfecho. Pacientes sem fatores de risco não desenvolveram adenocarcinoma em menos de 12 meses, mesmo com displasia anteriormente. CONCLUSÕES: O estudo confirmou maior risco de desenvolver displasia e adenocarcinoma em grupos epidemiológicos específicos, podendo direcionar o seguimento em pacientes com Esôfago de Barrett de forma mais custo efetiva.

BACKGROUND: Identification of epidemiological risk factors in Barrett's esophagus resulting in dysplasia and adenocarcinoma and its impact on prevention and early detection. AIMS: To evaluate epidemiological risk factors involved in the development of dysplasia and adenocarcinoma from Barrett's esophagus in a specific population. To critically analyze the surveillance period, aiming to individualize follow-up time according to identified risks. METHODS: A retrospective case-control study in a tertiary center with patients diagnosed and followed up for Barrett's esophagus. Patients with Barrett's esophagus who developed adenocarcinoma and/or dysplasia were compared to those who did not, considering variables such as sex, age, smoking status, Body mass index, ethnicity, and Barrett's extension. Logistic regression was performed to measure the odds ratio between risk factors for the outcome of adenocarcinoma and of dysplasia. The presence of epidemiological risk factors in this population was correlated with the time to develop adenocarcinoma from metaplasia. RESULTS: There was a statistically significant difference between the variables smoking status, race, sex, Barrett's esophagus extension, and age in the group with adenocarcinoma compared to the group without adenocarcinoma; smokers and former smokers had a 4.309 times higher risk of developing adenocarcinoma; the extension of Barrett's esophagus increased the risk by 1.193 times for each centimeter. In dysplasia group, the variables smoking status, Barrett's extension, and age were statistically significant; the extension of Barrett's esophagus increased the risk of dysplasia by 1.128 times for each centimeter, and age increased the risk by 1.023 times for each year. Patients without risk factors did not develop adenocarcinoma within 12 months, even with prior dysplasia. CONCLUSIONS: The study confirmed a higher risk of developing dysplasia and adenocarcinoma in specific epidemiological groups, allowing for more cost-effective monitorization in patients with Barrett's esophagus.

Barrett's esophagus (BE) is the condition in which a metaplastic columnar mucosa predisposed to neoplasia replaces the squamous mucosa of the distal esophagus. The current guidelines recommends that diagnosis requires the finding of intestinal metaplasia (IM) with goblet cells of at least 1 cm in length. BE affects approximately 1% of the general population and up to 14% of patients with gastroesophageal reflux disease (GERD). BE is a precursor of esophageal adenocarcinoma (EAC), which has increased in western countries. The main risk factors described for EAC associated with BE are male sex, age > 50 years, central obesity and tobacco use. Annual risk of EAC in patients with BE without dysplasia, low grade (LGD) and high-grade dysplasia is 0,1-0,3%, 0,5% y 5-8%, respectively. Treatment of non-dysplastic BE consists mainly of a healthy lifestyle change, chemoprevention with proton pump inhibitors and surveillance endoscopy every 3 to 5 years. It is recommended that from the presence of LGD patients are referred to an expert center for confirmation of the diagnosis, stage and thus define their management. In patients with BE and dysplasia or early-stage cancer, endoscopic therapy with resection and ablation is successful in about 90% of the patients. The main adverse event is esophageal stricture, which is managed endoscopically.

RESUMEN El esófago de Barrett (EB) se define como la condición en la cual una mucosa columnar metaplásica predispuesta a neoplasia reemplaza la mucosa escamosa del esófago distal. La guías actuales recomiendan que el diagnóstico requiere el hallazgo de metaplasia intestinal (MI) con células caliciformes de al menos 1 cm de longitud. El EB afecta aproximadamente al 1% de la población general y hasta en 14% de los pacientes con enfermedad por reflujo gastroesofágico (ERGE). El EB es precursor del adenocarcinoma esofágico (ACE), neoplasia en aumento en países occidentales. Los principales factores de riesgo descritos para ACE asociado a EB son: sexo masculino, edad > 50 años, obesidad central y tabaquismo. El riesgo anual de ACE en EB sin displasia, displasia de bajo (DBG) y alto grado es 0,1-0,3%, 0,5% y 5-8%, respectivamente. El tratamiento del EB no displásico consiste en un cambio de estilo de vida saludable, quimioprevención mediante inhibidores de la bomba de protones y vigilancia endoscópica cada 3 a 5 años. Se recomienda que a partir de la presencia de DBG los pacientes sean referidos a un centro experto para la confirmación del diagnóstico, estadio y así definir su manejo. En pacientes con EB y displasia o cáncer incipiente, el tratamiento endoscópico consiste en la resección y ablación, con un éxito cercano al 90%. El principal evento adverso es la estenosis esofágica que es manejada endoscópicamente.

ABSTRACT Despite endoscopic eradication therapy being an effective and durable treatment for Barrett’s esophagus-related neoplasia, even after achieving initial successful eradication, these patients remain at risk of recurrence and require ongoing routine examinations. Failure of radiofrequency ablation and argon plasma coagulation is reported in 10–20% of cases. Barretts Barrett s esophagusrelated esophagus related neoplasia examinations 1020 10 20 10–20 cases 102 1 2 10–2 10–

RESUMO Apesar de a terapia de erradicação endoscópica ser um tratamento eficaz e durável para a neoplasia relacionada ao esôfago de Barrett (BE), mesmo após a erradicação inicial bem-sucedida, esses pacientes permanecem em risco de recorrência e requerem exames de rotina contínuos. A falha na ablação por radiofrequência e na coagulação com plasma de argônio é relatada em 10–20% dos casos. BE, BE , (BE) bemsucedida, bemsucedida bem sucedida, sucedida bem-sucedida contínuos 1020 10 20 10–20 casos (BE 102 1 2 10–2 10–

ABSTRACT BACKGROUND: The addition of endoscopic ablative therapy plus proton pump inhibitors or fundoplication is postulated for the treatment of patients with long-segment Barrett´s esophagus (LSBE); however, it does not avoid acid and bile reflux in these patients. Fundoplication with distal gastrectomy and Roux-en-Y gastrojejunostomy is proposed as an acid suppression-duodenal diversion procedure demonstrating excellent results at long-term follow-up. There are no reports on therapeutic strategy with this combination. AIMS: To determine the early and long-term results observed in LSBE patients with or without low-grade dysplasia who underwent the acid suppression-duodenal diversion procedure combined with endoscopic therapy. METHODS: Prospective study including patients with endoscopic LSBE using the Prague classification for circumferential and maximal lengths and confirmed by histological study. Patients were submitted to argon plasma coagulation (21) or radiofrequency ablation (31). After receiving treatment, they were monitored at early and late follow-up (5–12 years) with endoscopic and histologic evaluation. RESULTS: Few complications (ulcers or strictures) were observed after the procedure. Re-treatment was required in both groups of patients. The reduction in length of metaplastic epithelium was significantly better after radiofrequency ablation compared to argon plasma coagulation (10.95 vs 21.15 mms for circumferential length; and 30.96 vs 44.41 mms for maximal length). Intestinal metaplasia disappeared in a high percentage of patients, and histological long-term results were quite similar in both groups. CONCLUSIONS: Endoscopic procedures combined with fundoplication plus acid suppression with duodenal diversion technique to eliminate metaplastic epithelium of distal esophagus could be considered a good alternative option for LSBE treatment. BACKGROUND longsegment long segment Barretts Barrett s (LSBE) however RouxenY Roux en Y suppressionduodenal longterm term followup. followup follow up. up combination AIMS lowgrade low grade METHODS 21 (21 31. 31 . (31) 5–12 512 5 12 (5–1 years evaluation RESULTS ulcers strictures Retreatment Re 10.95 1095 10 95 (10.9 2115 15 21.1 3096 30 96 30.9 4441 44 41 44.4 length. length) CONCLUSIONS (LSBE 2 (2 3 (31 5–1 51 1 (5– 10.9 109 9 (10. 211 21. 309 30. 444 4 44. ( (3 5– (5 10. (10 (1

RESUMO RACIONAL: A adição de terapia ablativa endoscópica associado a inibidores da bomba de prótons ou fundoplicatura tem sido postulada para o tratamento de pacientes com esôfago de Barrett de segmento longo (EBSL), no entanto, essa conduta não evita o refluxo ácido/biliar nesses pacientes. A fundoplicatura com gastrectomia distal e gastrojejunostomia em Y de Roux (FGD-Y) foi proposta como procedimento de supressão de ácido, demonstrando excelentes resultados no seguimento a longo prazo. Não há relatos na literature com a combinação dessa estratégia terapêutica. OBJETIVOS: Determinar os resultados precoces e a longo prazo observados em pacientes com EBSL com ou sem dysplasia de baixo grau, submetidos a FGD-Y, combinado com terapia endoscópica. MÉTODOS: Estudo prospectivo incluindo pacientes com EBSL, empregando a classificação de Praga, sendo o comprimento circunferencial (C) e máximo (M) e confirmado por estudo histológico. Os pacientes foram submetidos à coagulação com plasma de argônio (CPA, 21 pacientes) ou ablação por radiofrequência (ARF, 31 pacientes). Após o tratamento, eles foram seguidos precoce e tardiamente (5–12 anos), mediante avaliação endoscópica e histológica. RESULTADOS: Foram observadas poucas complicações após o procedimento (úlcera ou estenose). Re-tratamento foi necessário em ambos os grupos de pacientes. A redução do comprimento do epitélio metaplásico foi significativamente melhor após ARF em comparação com CPA (10,95 versus 21,15 mm para C e 30,96 versus 44,41 mm para M). A metaplasia intestinal desapareceu em elevada porcentagem de pacientes, e os resultados histológicos a longo prazo foram bastante semelhantes em ambos os grupos. CONCLUSÕES: Procedimentos endoscópicos combinados com fundoplicatura e gastrectomia distal e gastrojejunostomia em Y de Roux, para eliminar o epitélio metaplásico do esôfago distal podem ser considerados uma boa opção alternativa para o tratamento da EBSL. RACIONAL , (EBSL) entanto ácidobiliar ácido biliar FGDY FGD (FGD-Y terapêutica OBJETIVOS grau FGDY, Y, FGD-Y MÉTODOS Praga (C M (M histológico CPA, (CPA 2 ARF, (ARF 3 . 5–12 512 5 12 (5–1 anos, anos anos) histológica RESULTADOS úlcera estenose. estenose estenose) Retratamento Re 10,95 1095 10 95 (10,9 2115 15 21,1 3096 30 96 30,9 4441 44 41 44,4 M. M) CONCLUSÕES (EBSL 5–1 51 1 (5– 10,9 109 9 (10, 211 21, 309 30, 444 4 44, 5– (5 10, (10 ( (1

ABSTRACT Introduction: Barrett's esophagus is an acquired esophageal condition that can evolve into an adenocarcinoma. Over the years, endoscopic therapy has replaced surgery in the treatment of this condition. Objectives: to show the results of the application of the endoscopic mucosal resection and Hybrid-APC ablation technique in patients with Barrett's esophagus with low-grade or high-grade dysplasia. Methods: a descriptive and retrospective study was carried out in 29 patients between 2014 and 2019, in the Endoscopy service of the National Center for Minimal Access Surgery. Social and demographic variables were studied; endoscopic classification of Barrett's esophagus was established, as well as the characteristics of the lesion, histological diagnosis, endoscopic therapy, the presence of complications, incomplete resection and recurrence were described. Descriptive statistics techniques and non-parametric methods were applied. Results: male gender (58.62%) and the group aged 41-60 years (58.62%) predominated. The short segment with flat lesions and the long segment with raised lesions were more frequent (37.93%). A number of 15 resections and 14 ablations were performed with Hybrid-APC; one stricture was observed as a complication of endoscopic mucosal resection and recurrences with both techniques (5 patients, 17%), three related to resection and two to Hybrid-APC. The Hybrid-APC achieved a therapeutic effectiveness of 85.71% and the resection one of 80%. Conclusions: endoscopic treatment with low- and high-grade dysplasia proved to be an effective and safe procedure, with a low percentage of complications and recurrences.

RESUMEN Introducción: El esófago de Barrett es una condición esofágica adquirida, que puede evolucionar a un adenocarcinoma. Con el paso de los años, la terapia endoscópica ha remplazado la cirugía en el tratamiento de esta afección. Objetivos: Mostrar los resultados de la aplicación de la técnica de resección endoscópica de la mucosa y la ablación con Hibrid-APC en pacientes portadores de esófago de Barrett con displasia de bajo o alto grado. Métodos: Se realizó un estudio descriptivo y retrospectivo en 29 pacientes entre los años 2014-2019, en el Servicio de endoscopias del Centro Nacional de Cirugía de Mínimo Acceso. Se estudiaron variables sociodemográficas, se estableció la clasificación endoscópica del esófago de Barrett, se describieron las características de la lesión, el diagnóstico histológico, la terapéutica endoscópica, la presencia de complicaciones, la resección incompleta y recidiva. Se aplicaron técnicas de estadística descriptiva y métodos no paramétricos. Resultados: Predominó el sexo masculino (58,62 %) y el grupo de 41-60 años (58,62 %). El segmento corto con lesiones planas y el largo con lesiones elevadas fueron más frecuentes (37,93 %). Se realizaron 15 resecciones y 14 ablaciones con Hibrid-APC; se observó una estenosis como complicación de la resección endoscópica de la mucosa y recidivas con ambas técnicas (5 pacientes, 17 %), tres relacionadas con la resección y dos con el Hibrid-APC. El Hibrid-APC alcanzó una efectividad terapéutica del 85,71 % y la resección del 80 %. Conclusiones: El tratamiento endoscópico con displasia de bajo y alto grado, mostró ser un procedimiento efectivo y seguro, con bajo porciento de complicaciones y recidivas.

ABSTRACT Introduction: Barrett's esophagus occurs when esophageal stratified squamous esophageal epithelium is replaced by columnar-type epithelium and the presence of intestinal metaplasia is confirmed by biopsy. Gastroesophageal reflux disease is its main risk factor. It is considered the only identifiable premalignant condition for esophageal adenocarcinoma. The progenitors of metaplastic cells are not well known and may be from mature squamous epithelial cells or from immature progenitor cells. Their development is influenced by environmental factors acting on an intrinsic genetic predisposition. Several investigations have been carried out by the international scientific community on the basis of animal and human models. Objective: to summarize what has been presented in the literature to serve as a reference tool. Methods: a bibliographic search was carried out through PubMed and Google Scholar, in English and Spanish. Basically, scientific journals of recent years contained in the Medline database, others of similar quality but not included in Medline and some theses were consulted. Conclusions: the understanding of the physiopathogenesis, which takes into account the cells that originate intestinal metaplasia and the early identification of the stages of progression to adenocarcinoma, has gained significant attraction in research through human and animal models during the last years. Knowledge of the immune response and the luminal environment on a genetic basis will allow resources to be placed on high-risk patients and avoid unnecessary procedures in lower-risk patients.

RESUMEN Introducción: el esófago de Barret se produce cuando el epitelio escamoso estratificado esofágico es sustituido por epitelio de tipo columnar y se confirma mediante biopsia la presencia de metaplasia intestinal. La enfermedad por reflujo gastroesofágico es su principal factor de riesgo. Se considera la única condición premaligna identificable para el adenocarcinoma esofágico. Los progenitores de las células metaplásicas no son bien conocidos y pueden ser a partir de células maduras del epitelio escamoso o de células progenitoras inmaduras. Influyen en su desarrollo factores medioambientales que actuan sobre una predisposición genética intrínseca. Son varias las investigaciones desarrolladas por la comunidad científica internacional a partir de modelos animales y humanos. Objetivo: hacer un resumen de lo expuesto en la literatura para que valga de herramienta de consulta. Métodos: se realizó una búsqueda bibliográfica a través de PubMed y Google Académico, en inglés y español. Se consultaron, fundamentalmente, revistas científicas de los últimos años contenidas en la base de datos Medline, otras de similar calidad pero que no son parte de Medline y algunas tesis. Conclusiones: la comprensión de la fisiopatogenia, que tiene en cuenta las células que originan la metaplasia intestinal y la identificación temprana de los estados de progresión al adenocarcinoma, ha ganado una significativa atracción en la investigación a través de modelos humanos y animales durante los últimos años. El conocimiento de la respuesta inmune y el medioambiente luminar sobre una base genética permitirá colocar los recursos en los pacientes con alto riesgo y evitará procedimientos innecesarios a pacientes de menor riesgo.

ABSTRACT Introduction: Barrett's esophagus is an injury to the esophagus with high degenerative potential; histological confirmation of intestinal metaplasia in the esophagus is required for its diagnosis. Objective: To determine the frequency and epidemiological characteristics of patients with Barrett's esophagus. Methods: An observational and descriptive study was conducted between January 2018 and June 2019 in 14 patients with a histological diagnosis of Barrett's esophagus. The variables studied were: age, sex, skin color, epidemiological history, symptoms and signs, segment length according to the Sharma classification and presence of hiatal hernia, as well as the histological diagnosis according to the Vienna classification. The prevalence was determined with respect to the total number of upper gastrointestinal endoscopies performed in the period; descriptive statistical techniques were used. Results: A prevalence of 0,37 % was obtained. Males (78,6 %) and white skin color (71,4 %) predominated; the mean age was 51,64 years. Smoking was reported by 50 % of patients. Typical symptoms of gastroesophageal reflux, regurgitation (64,3 %) and heartburn (42,9 %) were the most frequent. The short segment variety was the most observed and hiatal hernia was found in 28,6 % of cases. Conclusions: The epidemiological characteristics of male patients, white skin color, between the 5th and 6th decades of life and typical symptoms of gastroesophageal reflux disease predominate.

RESUMEN Introducción: El esófago de Barrett es una lesión del esófago con elevado potencial degenerativo; para su diagnóstico se requiere la confirmación histológica de metaplasia intestinal en el esófago. Objetivo: Determinar la prevalencia del esófago de Barrett y las características epidemiológicas de los pacientes con esta afección. Métodos: Se realizó un estudio observacional descriptivo, entre enero del 2018 y junio del 2019, en 14 pacientes con diagnóstico histológico de esófago de Barrett. Las variables estudiadas fueron: edad, sexo, color de la piel, antecedentes epidemiológicos, síntomas y signos, longitud del segmento, de acuerdo con la clasificación de Sharma y presencia de hernia hiatal. Se realizó el diagnóstico histológico según la clasificación de Viena. Se determinó la prevalencia respecto del total de endoscopias digestivas altas realizadas en el periodo; emplearon de estadísticas descriptivas. Resultados: Se obtuvo una prevalencia de 0,37 %. El sexo masculino (78,6 %) y el color de piel blanca (71,4 %) predominaron; la edad media fue de 51,64 años. El consumo de tabaco fue referido por el 50 % de los pacientes. Los síntomas típicos de reflujo gastroesofágico, regurgitación (64,3 %) y pirosis (42,9 %) fueron los más frecuentes. La variedad de segmento corto fue la más observada y la hernia hiatal se encontró en 28,6 % de los casos. Conclusiones: Predominan las características epidemiológicas de ser pacientes masculinos, color de piel blanca, entre la 5ta y 6ta décadas de la vida y síntomas típicos de enfermedad por reflujo gastroesofágico. La prevalencia de la afección es baja.

RESUMO - RACIONAL: O bypass gástrico laparoscópico em Y de Roux (BGL) é o procedimento de escolha para pacientes com obesidade mórbida com doença do refluxo gastroesofágico (DRGE). No entanto, foram relatados sintomas de refluxo gastroesofágico ou esofagite após BGL. Poucos estudos esofágicos funcionais foram relatados até o momento. OBJETIVO: Avaliar os fatores anatômicos e fisiológicos que contribuem para o surgimento desses problemas em pacientes submetidos a BGL. MÉTODOS: Este estudo prospectivo incluiu 38 pacientes submetidos a BGL apresentando sintomas de refluxo gastroesofágico pós-operatório. Eles foram submetidos a avaliações clínicas, endoscópicas, radiológicas, manométricas e de pHmetria de 24 horas. RESULTADOS: 18/38 (47,4%) dos pacientes apresentavam azia ou regurgitação, 7 apresentavam dor e 4 pacientes apresentavam disfagia. Esofagite erosiva observada em 11 pacientes (28,9%), esôfago de Barrett (5,7%) e jejunite (10,5%) também foram observadas. A hérnia de hiato foi o achado mais frequente observado em 15 pacientes (39,5%), a maioria deles com estenoses anastomóticas concomitantes (10,5%). Alça jejunal cega longa foi detectada em 1 paciente (2,6%). Quase 75% dos pacientes apresentavam esfíncter esofágico inferior hipotensivo (9,61- + 4,05 mmHg), 17,4% tinham hipomotilidade do corpo esofágico e 64,7% apresentavam refluxo ácido patológico (% tempo pH <4 = 6,98- + 5,5; pontuação de DeMeester = 32,4- + 21,15). CONCLUSÃO: Embora raros, é possível observar refluxo gastroesofágico e outros sintomas pós-operatórios importantes após BGL, os quais estão associados a alterações anatômicas e fisiológicas na junção esofagogástrica e bolsa gástrica proximal.

ABSTRACT - BACKGROUND: Laparoscopic Roux-en-Y gastric bypass (LGB) is the recommended procedure for morbidly obese patients with gastroesophageal reflux disease (GERD). However, there have been reported gastroesophageal reflux symptoms or esophagitis after LGB. Few functional esophageal studies have been reported to date. AIM: To evaluate the anatomic and physiologic factors contributing to the appearance of these problems in patients who underwent LGB. METHODS: This prospective study included 38 patients with postoperative gastroesophageal reflux symptoms submitted to LGB. They were subjected to clinical, endoscopic, radiologic, manometric, and 24-h pH-monitoring evaluations. RESULTS: Eighteen (47.4%) of 38 patients presented with heartburn or regurgitation, 7 presented with pain, and 4 presented with dysphagia. Erosive esophagitis was observed in 11 (28.9%) patients, and Barrett’s esophagus (5.7%) and jejunitis (10.5%) were also observed. Hiatal hernia was the most frequent finding observed in 15 (39.5%) patients, and most (10.5%) of these patients appeared with concomitant anastomotic strictures. A long blind jejunal loop was detected in one (2.6%) patient. Nearly 75% of the patients had hypotensive lower esophageal sphincter (9.61±4.05 mmHg), 17.4% had hypomotility of the esophageal body, and 64.7% had pathologic acid reflux (% time pH <4=6.98±5.5; DeMeester’s score=32.4±21.15). CONCLUSION: Although rare, it is possible to observe gastroesophageal reflux and other important postoperative symptoms after LGB, which are associated with anatomic and physiologic abnormalities at the esophagogastric junction and proximal gastric pouch.

RESUMO RACIONAL: O esôfago de Barrett é uma condição adquirida que predispõe ao desenvolvimento de adenocarcinoma de esôfago. OBJETIVOS: Estabelecer uma associação entre os achados endoscópicos e histopatológicos em relação às projeções endoscópicas da mucosa epitelial colunar de diferentes tamanhos no esôfago, abaixo de 3,0 centímetros de extensão longitudinal. MÉTODOS: Foi realizado um estudo prospective incluindo 1262 pacientes submetidos à endoscopia digestiva alta, no período de julho de 2015 a junho de 2017. As projeções suspeitas foram medidas, subdivididas em 3 grupos de acordo com os tamanhos encontrados (Grupo I: <0,99 cm; Grupo II: 1,0 cm–1,99 cm; Grupo III: 2,0 cm–2,99 cm) e biópsias foram então realizadas. RESULTADOS: Houve prevalência geral de lesões suspeitas de 6,42% e de lesões de Barrett confirmadas de 1,17%, sem diferença estatística geral significativa entre os grupos. Porém, dos Grupos I e II, para o Grupo III, as diferenças foram significativas, mostrando que quanto maior a lesão, maior a probabilidade de diagnóstico de esôfago de Barrett. O número absoluto de lesões de Barrett foi 7, 9 e 6 para os grupos I, II e III, respectivamente. CONCLUSÕES: Os achados permitiram concluir que mesmo projeções abaixo de 3,0 cm apresentam possibilidade semelhante de evolução para o esôfago de Barrett. Se, por um lado os segmentos curtos são mais prevalentes, por outro os segmentos longos têm maior probabilidade de diagnóstico de esôfago de Barrett, razão pela qual são necessárias biópsias em todos os segmentos suspeitos.

ABSTRACT BACKGROUND: Barrett's esophagus is an acquired condition that predisposes to the development of esophageal adenocarcinoma. AIMS: The aim of this study was to establish an association between the endoscopic and the histopathological findings regarding differently sized endoscopic columnar epithelial mucosa projections in the low esophagus, under 3.0 cm in the longitudinal extent. METHODS: This is a prospective study, including 1262 patients who were submitted to upper gastrointestinal endoscopy in the period from July 2015 to June 2017. The suspicious projections were measured and subdivided into three groups according to the sizes encountered (Group I: <0.99 cm; Group II: 1.0–1.99 cm; and Group III: 2.0–2.99 cm), and biopsies were then performed. RESULTS: There was a general prevalence of suspicious lesions of 6.42% and of confirmed Barrett's lesions of 1.17%, without a general significant statistical difference among groups. However, from Groups I and II to Group III, the differences were significant, showing that the greater the lesion, the higher the probability of Barrett's esophagus diagnosis. The absolute number of Barrett's lesions was 7, 9, and 6 for Groups I, II, and III, respectively. CONCLUSIONS: The findings led to the conclusion that even projections under 3.0 cm present a similar possibility of evolution to Barrett's esophagus. If, on the one hand, short segments are more prevalent, on the other hand, the long segments have the higher probability of Barrett's esophagus diagnosis, which is why biopsies are required in all suspicious segments.

RESUMO CONTEXTO: A dissecção endoscópica submucosa (DES) no tratamento da neoplasia superficial do esôfago está associada a uma alta taxa de ressecção R0 em bloco e baixa taxa de recorrência. OBJETIVO: O objetivo deste estudo é comparar o desempenho e os resultados clínicos da DES com incisão circunferencial (DES-C) versus com DES com túnel submucoso (DES-TS). MÉTODOS: Estudo retrospectivo de banco de dados coletados prospectivamente de um centro especializado em DES, investigando pacientes consecutivos submetidos à DES por câncer de esôfago superficial, entre 2009 e 2018. DES-TS foi definida como a técnica de realizar primeiro incisões na mucosa seguida de tunelamento submucoso no sentido oral para anal. DES-C consistiu em completar uma incisão circunferencial seguida da dissecção submucosa. As principais variáveis do estudo incluíram taxas de ressecção em bloco e R0. Os resultados secundários incluíram características do procedimento, taxa de ressecção curativa, recorrência local e eventos adversos. RESULTADOS: Um total de 65 procedimentos (23 DES-TS e 42 DES-C) foram realizados para CCE de esôfago (40; 61,5%) e neoplasia associada ao EB (25; 38,5%). Não houve diferenças estatisticamente significativas entre os pacientes submetidos a DES-TS versus DES-C nas taxas de ressecção em bloco (91,3% vs 100%, P=0,12), R0 (65,2% vs 78,6%, P=0,24), taxas de ressecção curativa (65,2% vs 73,8%, P=0,47) e tempo médio do procedimento (118,7 min com vs 102,4 min, P=0,35). Os eventos adversos para DES-TS e DES-C foram os seguintes: sangramento (0 vs 2,4%; P=0,53), perfuração (4,3% vs 0; P=0,61), estenose esofágica (8,7% vs 9,5%; P=0,31). A recorrência local foi encontrada em 8,7% após DES-TS e 2,4% após DES-C (P=0,28) em um seguimento médio de 8 e 2,75 anos, respectivamente (P=0,001). CONCLUSÃO: DES-TS e DES-C demostram ser igualmente eficazes com perfil de segurança semelhante para o tratamento das neoplasias superficiais do esôfago.

ABSTRACT BACKGROUND: Endoscopic submucosal dissection (ESD) of esophageal superficial neoplasm is associated with a high en bloc R0 resection rate and low recurrence. OBJECTIVE: We aim to compare the performance and clinical outcomes of ESD via ESD after circumferential incision (ESD-C) versus submucosal tunneling (ESD-T). METHODS: Single-center retrospective analysis of all consecutive patients who underwent ESD for superficial esophageal cancer, between 2009 and 2018. ESD-T was defined as the technique of making the mucosal incisions followed by submucosal tunneling in the oral to anal direction. ESD-C consisted of completing a circumferential incision followed by ESD. Main study outcomes included en bloc and R0 resection rates. Secondary outcomes included procedural characteristics, curative resection rate, local recurrence and adverse events. RESULTS: A total of 65 procedures (23 ESD-T and 42 ESD-C) were performed for ESCC (40; 61.5%) and BE-neoplasia (25; 38.5%). There were no statistically significant differences between patients who underwent ESD-T versus ESD-C in en bloc (91.3% vs 100%, P=0.12), R0 (65.2% vs 78.6%, P=0.24), curative resection rates (65.2% vs 73.8%, P=0.47) and mean procedure time (118.7 min with vs 102.4 min, P=0.35). Adverse events for ESD-T and ESD-C were as follows: bleeding (0 versus 2.4%; P=0.53), perforation (4.3% vs 0; P=0.61), esophageal stricture (8.7% versus 9.5%; P=0.31). Local recurrence was encountered in 8.7% after ESD-T and 2.4% after ESD-C (P=0.28) at a mean follow-up of 8 and 2.75 years, respectively (P=0.001). CONCLUSION: ESD-T and ESD-C appear to be equally effective with similar safety profiles for the management of superficial esophageal neoplasms.

ABSTRACT Background: due to the risk of unsatisfactory evolution of patients with Barrett's esophagus (EB) towards esophageal adenocarcinoma, it is necessary to apply safe and effective techniques that prevent the outcome towards esophageal malignant lesions. The Hybrid-APC (argon plasma coagulation) is one of these techniques that allow stopping the natural history of EB in its initial stage. Objective: to conduct a review and reflection on the endoscopic treatment of Barrett's esophagus with the Hybrid-APC. Methods: a search was conducted on Google, PudMed, SciELo regional, SciELo Public Health, National Library of Medicine PudMed engines. The search strategy used the terms: Barrett's esophagus, endoscopic treatment, Hybrid-APC. Extensive documents were evaluated and a summary document of the information collected was developed. The literature search found 20 works related to Barrett's esophagus, ten on endoscopic treatment, and five on specific to the use of Hybrid-APC. Results: studies reported the effectiveness and security of the ablation with the Hybrid-APC in the endoscopic treatment of Barrett's esophagus with low degree dysplasia, and in the high degree dysplasia and remnant carcinoma in situ, after the endoscopic mucous resection. Conclusions: the endoscopic treatment of Barrett's esophagus with Hybrid-APC is considered an alternative technique to stop the evolution of this pathology towards adenocarcinoma. This will generate motivation for training and its implementation in a generalized way.

RESUMEN Fundamento: debido al riesgo de evolución insatisfactoria de los pacientes con esófago de Barrett hacia el adenocarcinoma esofágico, es necesaria la aplicación de técnicas seguras y efectivas que logren prevenir el desenlace hacia lesiones malignas esofágicas. El Hybrid-APC (Argón plasma coagulación) es una de estas técnicas que permiten detener la historia natural del esófago de Barrett en su etapa inicial. Objetivo: realizar una revisión y reflexión acerca del tratamiento endoscópico del esófago de Barrett con el Hybrid-APC. Métodos: se realizó una búsqueda en los motores Google, PudMed, SciELO regional, SciELO Public Health, National Library of Medicine PudMed. En la estrategia de la búsqueda se utilizaron los términos: esófago de Barrett, tratamiento endoscópico, Hybrid-APC. Se evaluaron los documentos en extensos y se desarrolló un documento resumen de la información recolectada. En la búsqueda bibliográfica realizada se encontraron 20 trabajos relacionados con esófago de Barrett, tratamiento endoscópico 10 y específico del uso del Hybrid-APC cinco. Resultados: los estudios reportaron la efectividad y seguridad de la ablación con el Hybrid-APC en el tratamiento endoscópico del esófago de Barrett con displasia de bajo grado; y en la displasia de alto grado y carcinoma in situ remanente, luego de una resección mucosa endoscópica. Conclusiones: el tratamiento endoscópico del esófago de Barrett con Hybrid-APC, se considera una técnica alternativa para detener la evolución de esta enfermedad hacia el adenocarcinoma. Esto generará motivación para entrenamientos y su puesta en práctica de forma generalizada.

ABSTRACT Objective: The objective of this article is to carry out a systematic review of scientific articles that reveal the risk factors associated with Barret's esophagus in hospitalized patients. Methods: The review was performed by electronic search for articles related to risk factors associated with Barret's esophagus in hospitalized patients. The PEO question was: What are the risk factors associated with Barret's esophagus in hospitalized patients? The search sources were in PUBMED. The search terms were: Risk Factors; Barret's esophagus; hospitalized patients. For this review, articles published from 2010 that had research experiences and theoretical-conceptual aspects were selected. Results: Of the 389 results found with indexing sources, a total of 25 articles were selected where 22 articles contained research results and 3 were considered for theoretical-conceptual aspects that are related to the purpose of the study. The search resulted in risk factors associated with Barret's esophagus according to demographic characteristics and patient traits, presentation, and clinical data and lifestyles. Conclusion: An association of various risk factors with Barret's esophagus is evidenced in hospitalized patients. The most concordant risk factors associated with Barret's esophagus in the review were male sex, increased age, metabolic syndrome, hiatal hernia, use of proton pump inhibitors, gastroesophageal reflux (GER), obstructive sleep apnea, and erosive esophagitis.

RESUMEN Objetivo: El objetivo de este artículo es realizar una revisión sistemática de artículos científicos que revelen los factores de riesgo asociados a Esófago de Barret en pacientes hospitalizados. Métodos: La revisión fue efectuada mediante búsqueda electrónica de artículos relacionados a factores de riesgo asociadas a Esófago de Barret en pacientes hospitalizados. La pregunta PEO fue ¿Cuáles son los factores de riesgo asociados a Esófago de Barret en pacientes hospitalizados? Las fuentes de búsqueda fueron en PUBMED. Los términos de búsqueda fueron: Factores de Riesgo; Esófago de Barret; pacientes hospitalizados. Para esta revisión se seleccionaron los artículos publicados a partir el año 2010 que tuvieron experiencias investigativas y aspectos teórico-conceptuales. Resultados: De los 389 resultados encontrados con fuentes de indexación, se seleccionaron un total de 25 artículos donde 22 artículos contenían resultados de investigación y 3 fueron considerados para aspectos teórico - conceptuales que se relacionan con el propósito del estudio. La búsqueda dio como resultado factores de riesgo asociados a Esófago de Barret según las características demográficas y rasgos del paciente, presentación y datos clínicos y estilos de vida. Conclusión: Se evidencia una asociación de diversos factores de riesgo con Esófago de Barret en pacientes hospitalizados. Los factores de riesgo asociados a Esófago de Barret en la revisión que fueron más concordantes son sexo masculino, edad incrementada, síndrome metabólico, hernia hiatal, uso de inhibidores de bomba de protones, reflujo gastroesofágico(RGE), apnea obstructiva del sueño y esofagitis erosiva.

ABSTRACT Introduction: endoscopic mucosal resection is a useful technique in the treatment of dysplasia and carcinoma in situ associated with Barrett's oesophagus. It improves the quality of the diagnosis by the possibility of obtaining a larger sample of tissue for histological study, it allows to delimit the presence of lesion at the edges and the invasion to deep planes and favours decision making. Objective: to show different aspects related to endoscopic mucosal resection in order to improve the knowledge of the specialists and to improve its application. Methods: the search for the information was done through PubMed and Google Academic. We consulted, mainly, scientific journals of the last years contained in the Medline database, others of similar quality but not part of Medline and some theses. Results: gastroesophageal reflux disease is the main risk factor of Barretten's esophagus, and symptoms can go unnoticed. Conclusions: this technique is a fundamental tool in the early treatment of dysplastic changes, which are currently not very widespread, despite the fact that its technical requirements are simple.

RESUMEN Introducción: la resección endoscópica mucosa es una técnica útil en el tratamiento de la displasia y el carcinoma in situ asociado al esófago de Barrett que eleva la calidad del diagnóstico por la posibilidad de obtener una mayor muestra de tejido para estudio histológico, permite delimitar la presencia de lesión en los bordes y la invasión a planos profundos y favorecer la toma de decisión. Objetivo: mostrar diferentes aspectos relacionados con la resección endoscópica mucosa para mejorar el conocimiento de los especialistas e intencionar su aplicación. Métodos: la búsqueda de la información se realizó a través de PubMed y Google Académico. Se consultaron, fundamentalmente, revistas científicas de los últimos años contenidas en la base de datos Medline, otras de similar calidad pero que no son parte de Medline y algunas tesis. Resultados: la enfermedad por reflujo gastroesofágico es el principal factor de riesgo del esófago de Barretten el que los síntomas pueden pasar desapercibidos. Conclusiones: esta técnica es una herramienta fundamental en el tratamiento precoz de los cambios displásicos, suaplicación actuales poco difundida a pesar de que sus requerimientos técnicos son sencillos.