[Prevalence of gallbladder cancer in a Northern Chilean region]. / Cáncer de vesícula en colecistectomías de la región de Tarapacá. Análisis según pertenencia étnica.

BACKGROUND: Gallbladder Cancer (GBC) prevalence varies among countries, associated with different geographical and genetic factors. The Mapuche ethnicity (Ethnia mostly located between the VIII and X Chilean regions) stands out in Chile due to its high GBC prevalence. AIM: To estimate the GBC prevalence in patients undergoing cholecystectomy at a public hospital in the Northern region of Chile (Tarapaca), where other ethnical groups are common. MATERIAL AND METHODS: Pathological reports of 3270 patients (72% women) who underwent cholecystectomy between January 2016 and December 2019 were revised. Subsequently, the accreditation of ethnic belonging for each patient to one of the ten native communities in Chile was requested to the National Corporation for Native Communities Development (CONADI). RESULTS: According to the analysis of pathological reports, the global GBC prevalence was 0.3 %. The prevalence in Aymaras was 0.4% and 0% in Mapuches. The distribution of ethnic origins among analyzed patients was Aymara in 14.3, Mapuche in 2.7%, Diaguita in 1.7%, Quechua in 1.3%, Atacameña in 0.2%, and Colla in 0.2%. No specific ethnic origin was found in 79% of patients. CONCLUSIONS: There was a low GBC prevalence rate in Northern Chile and among the Aymara population.

[Epidemiology of acute pancreatitis in Chile between 2013 and 2018]. / Epidemiología de la pancreatitis aguda en Chile entre los años 2013 y 2018.

BACKGROUND: The worldwide incidence of acute pancreatitis (AP) is increasing. AIM: To determine the national incidence of AP between 2013 and 2018. MATERIAL AND METHODS: Analysis of hospital discharge records available at the web page of the Statistical and Information Service of the Chilean Ministry of Health. We recorded the number of patients discharged with a diagnosis of AP, excluding chronic pancreatitis and pancreatic cancer, between 2013 and 2018. We also recorded length of hospital stay, age, etiology, and lethality. Rates of raw and age-adjusted incidence were calculated. RESULTS: During the study period, 46,420 patients with AP were discharged, with an incidence rate ranging between 39 and 43.7/100,000 inhabitants, and a non-significant increase along time of 8.6%. There are important differences between the average adjusted rates of Northern (Arica to Metropolitan) and Southern regions (O'Higgins to Magallanes), with rates of 36.9 and 53.6/100,000 inhabitants respectively (p < 0.01). The average hospital stay was 11 days. Two thirds of cases were aged between 20 and 64 years. The case fatality was 4.2%, with no decrease between 2013 and 2018. The mortality rate was 1.6/100,000 inhabitants. CONCLUSIONS: The annual incidence of AP is 42.6/100,000 inhabitants, with geographical differences from North to South, which can be associated with the high frequency of biliary tract disease in aboriginal ethnic groups. The age distribution and length hospital stay were stable over time.

[Prevalence of cholelithiasis and gallbladder cancer among Aymara individuals]. / Prevalencia de colecistolitiasis y cáncer de vesícula en una población rural aymara de Chile.

BACKGROUND: The prevalence of cholelithiasis and gallbladder cancer may be different across ethnic groups. AIM: To study the prevalence of cholelithiasis and gallbladder cancer among Aymara individuals. MATERIAL AND METHODS: An abdominal ultrasound was carried out in a sample of 182 Aymara women aged 46 ± 16 years and 76 Aymara men aged 55 ± 16 years. In addition, the histopathological reports of both patients with a history of previous cholecystectomy and those operated after the study were reviewed. RESULTS: Ultrasound was normal in 150 participants (58%), 76 had cholelithiasis (30%) and 32 (12%) had a history of cholecystectomy. Pathological reports of the excised gallbladder were available for 106 cases and showed a chronic cholecystitis in 98% of cases. Gallbladder cancer was not reported. CONCLUSIONS: There is a 42% prevalence of cholelithiasis and no gallbladder cancer in this sample of Aymara population.

[Results of gastric bypass for morbid obesity after a follow up of seven to 10 years]. / Efecto del bypass gástrico a largo plazo (7 a 10 años) en pacientes con obesidad severa y mórbida sobre el peso corporal, diabetes, dislipidemia y desarrollo de anemia.

BACKGROUND: There is a paucity of information about the long term effects of gastric bypass for morbid obesity. AIM: To study the evolution of weight and complications of obesity, seven to 10 years after gastric bypass surgery. MATERIAL AND METHODS: One hundred eighteen subjects with morbid obesity, aged 15 to 66 years (103 women), were followed for a mean of 94 months after surgery. Body weight, fasting blood glucose, total cholesterol, triglycerides and hemoglobin were measured before surgery and during follow up. RESULTS: At 24 months of follow up, all patients lost weight and there was a mild weight increase at 94 months, that paralleled the preoperative body mass index. Diabetes, hypercholesterolemia and hypertriglyceridemia subsided in 95, 87 and 94% of cases, respectively. Twenty percent of patients had mild anemia and 11% moderate or severe anemia. No patient recovered the preoperative weight. CONCLUSIONS: Weight reducing effects of gastric bypass are maintained after 94 months of follow up with the expected health benefits.

Cáncer de vesícula en colecistectomías de la región de Tarapacá. Análisis según pertenencia étnica / Prevalence of gallbladder cancer in a Northern Chilean region

BACKGROUND: Gallbladder Cancer (GBC) prevalence varies among countries, associated with different geographical and genetic factors. The Mapuche ethnicity (Ethnia mostly located between the VIII and X Chilean regions) stands out in Chile due to its high GBC prevalence. Aim: To estimate the GBC prevalence in patients undergoing cholecystectomy at a public hospital in the Northern region of Chile (Tarapaca), where other ethnical groups are common. MATERIAL AND METHODS: Pathological reports of 3270 patients (72% women) who underwent cholecystectomy between January 2016 and December 2019 were revised. Subsequently, the accreditation of ethnic belonging for each patient to one of the ten native communities in Chile was requested to the National Corporation for Native Communities Development (CONADI). RESULTS: According to the analysis of pathological reports, the global GBC prevalence was 0.3 %. The prevalence in Aymaras was 0.4% and 0% in Mapuches. The distribution of ethnic origins among analyzed patients was Aymara in 14.3, Mapuche in 2.7%, Diaguita in 1.7%, Quechua in 1.3%, Atacameña in 0.2%, and Colla in 0.2%. No specific ethnic origin was found in 79% of patients. Conclusions: There was a low GBC prevalence rate in Northern Chile and among the Aymara population.

Epidemiología de la pancreatitis aguda en Chile entre los años 2013 y 2018 / Epidemiology of acute pancreatitis in Chile between 2013 and 2018

Background: The worldwide incidence of acute pancreatitis (AP) is increasing. Aim: To determine the national incidence of AP between 2013 and 2018. Material and Methods: Analysis of hospital discharge records available at the web page of the Statistical and Information Service of the Chilean Ministry of Health. We recorded the number of patients discharged with a diagnosis of AP, excluding chronic pancreatitis and pancreatic cancer, between 2013 and 2018. We also recorded length of hospital stay, age, etiology, and lethality. Rates of raw and age-adjusted incidence were calculated. Results: During the study period, 46,420 patients with AP were discharged, with an incidence rate ranging between 39 and 43.7/100,000 inhabitants, and a non-significant increase along time of 8.6%. There are important differences between the average adjusted rates of Northern (Arica to Metropolitan) and Southern regions (O'Higgins to Magallanes), with rates of 36.9 and 53.6/100,000 inhabitants respectively (p < 0.01). The average hospital stay was 11 days. Two thirds of cases were aged between 20 and 64 years. The case fatality was 4.2%, with no decrease between 2013 and 2018. The mortality rate was 1.6/100,000 inhabitants. Conclusions: The annual incidence of AP is 42.6/100,000 inhabitants, with geographical differences from North to South, which can be associated with the high frequency of biliary tract disease in aboriginal ethnic groups. The age distribution and length hospital stay were stable over time.

Utilidad del dispositivo de potenciación del esfínter esofágico distal (LINX®) para pacientes con reflujo gastroesofágico / Usefulness of the distal esophageal sphincter enhancement device (LINX®) for patients with gastroesophageal reflux

Resumen La fundoplicatura de Nissen laparoscópica (FNL) es el gold standard del tratamiento quirúrgico de pacientes con reflujo gastroesofágico patológico (RGE), con perfil de seguridad y resultados a largo plazo satisfactorios en un 80%. En la última década, se ha propuesto el uso de un dispositivo de potenciación del esfínter esofágico inferior (MSA) comercializado como LINX® (de Ethicon, Johnson & Johnson), como alternativa a la cirugía antirreflujo. El dispositivo consiste en una cadena expansible de cuentas de titanio con un núcleo magnético diseñadas para aumentar el tono del esfínter esofágico inferior (EEI) y evitar su relajación inadecuada. Los resultados preliminares han sido alentadores, sin embargo, no está exento de complicaciones. Las indicaciones más aceptadas son: RGE con motilidad esofágica normal y sin esofagitis erosiva, hernia hiatal < 3 cm, IMC <35 kg/m2 y pacientes sin cirugías gastroesofágicas previas. Se instala por vía laparoscópica. Los efectos adversos más importantes son: disfagia con necesidad de dilataciones endoscópicas, y, retiro del dispositivo, entre 1% y 7% a los 2,5 años. La mayoría de los estudios tienen limitaciones metodológicas, conflictos de interés, falta de resultados objetivos y seguimientos a largo plazo, impidiendo llegar a conclusiones extrapolables respecto a la eficacia del MSA.

Laparoscopic Nissen Fundoplication (LNF) is the gold standard of surgical treatment for patients with Gastroesophageal Reflux Disease (GER), with safety profile and long term results satisfactory in 80%. In the last decade, the use of a Lower Esophageal Sphincter Enhancement Device (LESD), marketed as LINX® (from Ethicon, Johnson & Johnson), has been proposed as an alternative to Anti-Reflux Surgery. The device consists of an expandable chain of titanium beads with a magnetic core designed to increase the tone of the lower esophageal sphincter (LES) and prevent its improper relaxation. Preliminary results have been encouraging; however, it is not without complications. The most accepted indications are: GER with normal esophageal motility and without erosive esophagitis, hiatal hernia < 3 cm, BMI <35 kg/m2, and patients without previous gastroesophageal surgeries. It is installed by laparoscopy. The most important adverse effects are: dysphagia with the need for endoscopic dilations, and, removal of the device, between 1 and 7% at 2.5 years. Most of the studies have methodological limitations, conflicts of interest, lack of objective results and long-term follow-up, preventing the reaching of extrapolable conclusions regarding the efficacy of MSA.

Acalasia y su relación con el cáncer esofágico / Esophageal acalasia and its relationship with esophageal cancer

Resumen La acalasia es un trastorno motor primario de la musculatura lisa esofágica que se caracteriza por disfagia, pseudorregurgitación y baja de peso. El tratamiento puede ser endoscópico o quirúrgico. Sólo se conocen los resultados a largo plazo de la cirugía, mientras que los endoscópicos tienen aún un seguimiento muy corto y no permiten sacar conclusiones valederas. La acalasia es una lesión que tiene una probabilidad significativamente mayor de desarrollar un cáncer esofágico, ya sea de tipo epidermoide, por inflamación crónica y retención de comida en el esófago, o un adenocarcinoma, secundario a reflujo gastroesofágico, que aparece posterior a cualquier tratamiento. Las publicaciones muestran que alrededor de 3% a 4% de los pacientes presentan a largo plazo, sobre 10 a 15 años postratamiento, el desarrollo de un cáncer avanzado del esófago. Se concluye que es indispensable un seguimiento clínico y endoscópico en forma rutinaria a estos pacientes.

Achalasia is a primary motor disorder of the esophageal smooth muscle characterized by dysphagia, pseudoregurgitation, and weight loss. Treatment can be endoscopic or surgical. The long-term results are only known from surgery, while endoscopic results still have a very short follow-up and do not allow us to draw valid conclusions. Achalasia is a lesión that has a significantly higher probability of developing esophageal cancer, whether of the epidermoid type, due to chronic inflammation and food retention in the esophagus, or an adenocarcinoma, secondary to gastroesophageal reflux, which appears after any treatment. Publications show that about 3 to 4% of patients present in time, about 10 to 15 years after treatment, the development of advanced cancer of the esophagus. It is concluded that clinical and endoscopic follow-up is essential in these patients on a routine basis.

Conducta actual frente la hemorragia digestiva alta: desde el diagnóstico al tratamiento / Current behavior against Upper Digestive Hemorrhage: from diagnosis to treatment

Resumen La hemorragia digestiva alta (HDA) es una emergencia médico-quirúrgica común que debe ser tratada precozmente por su alta morbimortalidad. Corresponde a sangrado del esófago, estómago o del duodeno proximal, y se divide en etiología no variceal y variceal. Dentro de las no variceales destaca la úlcera péptica como la más frecuente, siendo esta producida por un desbalance entre factores protectores y agresivos. Por otro lado, en las hemorragias variceales destacan las várices gastroduodenales, las cuales son consecuencia del aumento de la presión portal. La incidencia de la HDA a nivel mundial varía entre 37 a 172 casos por cada 100.000 habitantes por año y la mortalidad entre un 5 y un 14% según diferentes estudios. Lamentablemente, no existen cifras nacionales fidedignas de incidencia y prevalencia. El médico debe conocer bien la presentación clínica y la fisiopatología para ser asertivo en la sospecha, diagnóstico y manejo de esta patología. En cuanto al tratamiento, el enfrentamiento se divide en el manejo de urgencias y luego endoscópico, puesto que la resucitación temprana intensiva puede reducir la morbimortalidad en pacientes con HDA. A continuación se hará una revisión actualizada enfocada en los aspectos más relevantes del manejo de esta patología. Se obtuvieron los datos de Pubmed y Scielo, específicamente la búsqueda de artículos originales y de revisiones sistemáticas con las palabras "hemorragia digestiva alta", "úlcera péptica", "várices esofágicas" y otras relacionadas. Los criterios usados fueron artículos preferentemente menores a 5 años de publicación en revistas científicas de alto índice de impacto.

Upper gastrointestinal bleeding (UHD) is a common medical-surgical emergency that must be treated early due to its high morbidity and mortality. It corresponds to bleeding from the esophagus, stomach, or proximal duodenum, and is divided into non-variceal and variceal etiology. Among the non-variceal, the peptic ulcer stands out as the most frequent, being this produced by an imbalance between protective and aggressive factors. On the other hand, in variceal hemorrhages gastroduodenal varices stand out, are a consequence of increased portal pressure. The incidence of HDA worldwide varies between 37 to 172 cases per 100,000 inhabitants per year and mortality between 5 to 14% according to different studies. Unfortunately, there are no reliable national statistics of incidence and prevalence. The physician must have a good understanding of the clinical presentation and pathophysiology to be assertive in the suspicion, diagnosis, and management of this pathology. Regarding treatment, the confrontation is divided into emergency management and then endoscopic, because early intensive resuscitation can reduce morbidity and mortality in patients with UHD. This is an updated review which will be focused on the most relevant aspects of the management of this pathology. Data were obtained from Pubmed and Scielo, specifically searching for original articles and systematic reviews with the words "upper gastrointestinal bleeding", "peptic ulcer", "esophageal varices" and other related words. The criteria used were articles preferably less than 5 years old in scientific journals with a high impact index.

Prevalencia de colecistolitiasis y cáncer de vesícula en una población rural aymara de Chile

Background: The prevalence of cholelithiasis and gallbladder cancer may be different across ethnic groups. Aim: To study the prevalence of cholelithiasis and gallbladder cancer among Aymara individuals. Material and Methods: An abdominal ultrasound was carried out in a sample of 182 Aymara women aged 46 ± 16 years and 76 Aymara men aged 55 ± 16 years. In addition, the histopathological reports of both patients with a history of previous cholecystectomy and those operated after the study were reviewed. Results: Ultrasound was normal in 150 participants (58%), 76 had cholelithiasis (30%) and 32 (12%) had a history of cholecystectomy. Pathological reports of the excised gallbladder were available for 106 cases and showed a chronic cholecystitis in 98% of cases. Gallbladder cancer was not reported. Conclusions: There is a 42% prevalence of cholelithiasis and no gallbladder cancer in this sample of Aymara population.

Blood count and C-reactive protein evolution in gastric cancer patients with total gastrectomy surgery.

BACKGROUND: The complete blood count (CBC) and C-reactive protein (CRP) are useful inflammatory parameters for ruling out acute postoperative inflammatory complications. AIM: To determine their changes in gastric cancer patients submitted to total gastrectomy. METHODS: This is a prospective study, with 36 patients with gastric cancer who were submitted to elective total gastrectomy. On the first, third and fifth postoperative day (POD), blood count and CRP changes were assessed. Patients with postoperative complications were excluded. RESULTS: Twenty-one (58%) were men and 15 (42%) women. The mean age was 65 years. The leukocytes peaked on the 1st POD with a mean of 13,826 u/mm³, and decreased to 8,266 u/mm³ by the 5th POD. The bacilliforms peaked on the 1st POD with a maximum value of 1.48%. CRP reached its maximum level on the 3rd POD with a mean of 144.64 mg/l±44.84. Preoperative hematocrit (HCT) was 35% and 33.67% by the 5th POD. Hemoglobin, showed similar values. CONCLUSIONS: Leukocytes increased during the 1st POD but reached normal values by the 5th POD. CRP peaked on the 3rd POD but did not reach normal values by the 5th POD.

Evolución de operaciones por enfermedades del intestino proximal y glándulas anexas realizadas en Chile entre 2011 y 2016 / Evolution of surgeries due to diseases of the proximal intestine and anexal glands perfomed in Chile between 2011 and 2016

INTRODUCCIÓN: Los datos sobre número de operaciones realizadas en Chile en patología del intestino proximal y glándulas anexas, han sido cada vez más precisas en los registros estadísticos del MINSAL en los últimos años. OBJETIVO: a) Incorporar datos de otras operaciones no incluidas en reportes previos, b) comparar los resultados de operaciones de alta complejidad reportadas el año 2011 y confrontarlos con los datos del año 2016. MATERIAL Y MÉTODO: En el DEIS (Departamento de Estadística e Información de Salud) se obtuvo el número total de operaciones realizadas en Chile el año 2016 y mortalidad operatoria al momento del egreso de diferentes patologías del intestino proximal y glándulas anexas, siendo la mayoría tumores malignos: cáncer de esófago, estómago, páncreas, hígado y vías biliares intrahepáticas y vesícula biliar. Los resultados se compararon con los obtenidos del año 2011. RESULTADOS: La letalidad anual de cánceres digestivos demostró un alza del cáncer de páncreas e hígado, mientras que se aprecia una baja en el cáncer de esófago y vesícula biliar. Operaciones de patología benigna, como la esofagocardiomiotomía y cirugías antirreflujo laparoscópica no mostraron mortalidad, al igual que el bypass gástrico. La colecistectomía y la gastrectomía vertical laparoscópicas, tuvieron una muy baja mortalidad operatoria. En las intervenciones quirúrgicas por tumores malignos se apreció en todos una disminución de la mortalidad operatoria comparado con el año 2011, aunque no fue estadísticamente significativo. CONCLUSIÓN: El presente estudio muestra un aumento de las operaciones por enfermedades del intestino proximal y glándulas anexas así como una disminución de la mortalidad operatoria el año 2016 comparado con el 2011.

INTRODUCTION: The number of operations performed in Chile due to diseases for the foregut, have been every time more precise and complete in the National Register Data of Statistics in Health (MINSAL), and published in several reports (years 1983, 2005 and 2011). OBJECTIVES: a) to incorporate data of new operations not included before and b) to compare the results of high complex operations reported on 2011 and 2016. MATERIAL AND METHODS: from the DEIS (Department of Statistics and Information of Health) we obtained the total number of operations performed during 2016, and the operative mortality at the time of discharge from the hospital for different diseases of the foregut been the majority malignant tumors: esophageal cancer, gastric cancer, pancreatic cancer, liver and bile ducts carcinoma, and cancer of the gallbladder. The results were compared to dose obtained the year 2011. RESULTS: The annual lethality of digestive malignant tumors showed an increase in pancreatic and liver cancer, while a decrease was observed in patients with esophageal cancer al gallbladder cancer. Operations for benign pathology like esophagomiotomy and laparoscopic antireflux surgery showed no mortality, as well as gastric bypass. Laparoscopic cholecistectomy, and laparoscopic sleeve gastrectomy presented a very low mortality. Surgical procedures for malignant diseases showed a decrease in operative mortality compare to 2011, although not significant. CONCLUSIONS: The present study shows an increase in the operations for foregut diseases performed during 2016 compared with the year 2011, as well as a decrease in operative mortality.

Puntos críticos en la evaluación y tratamiento de octogenarios con colecistolitiasis / Critical points in the evaluation and treatment of octogenarians with colecistolitiasis

Resumen Introducción: Existe una tendencia global al envejecimiento y con ello un aumento de patologías asociadas. En Chile la prevalencia de la colelitiasis o colecistolitiasis aumenta con la edad, siendo la cole-cistectomía una de las cirugías más frecuentes. Existen escasos estudios latinoamericanos referentes a la realidad de la población octogenaria expuesta a este problema. Objetivo: Estudiar la morbimortalidad posoperatoria en pacientes octogenarios operados de colecistectomía. Definir la precisión de distintas herramientas diagnósticas preoperatorias, estudiar variables operatorias y precisar costos hospitalarios. Materiales y Método: Estudio observacional retrospectivo de la ficha clínica electrónica del Hospital Clínico de la Universidad de Chile, entre enero de 2012 y mayo de 2017. Se incluyeron pacientes con edad igual o mayor a 80 años, en quienes se realizó una colecistectomía electiva o de urgencia por patología benigna. Resultados: Se incluyeron 145 pacientes, 51,7% fueron mujeres, el promedio de edad fue de 84,1 años y un 74,5% presentaba comorbilidades. El 62,1% de los casos ingresó por urgencia. 26,2% de toda la muestra presentó coledocolitiasis. La colecistectomía fue laparoscópica en 73,8% de la muestra global, la tasa de conversión fue de 14,5% en población de urgencia y 1,8% en población electiva (p = 0,009). La población operada totalmente por vía laparoscópica con coledocolitiasis fue resuelta en un 95,2% a través de Rendez-vous, con una tasa de éxito del 100%. La tasa de complicaciones fue de 17,9% siendo en su mayoría médicas, la mortalidad quirúrgica fue de 2,1%, siendo todos casos de urgencia. El costo promedio de atención en salud hospitalaria fue de $5.888.104 pesos chilenos (U$9.000). Conclusión: El paciente octogenario con colecistolitiasis representa un desafío quirúrgico, dado un mayor número de comorbilidades, un cuadro clínico más agresivo y una elevada tasa de coledocolitiasis. Es aconsejable valorar el abordaje mínimamente invasivo y realizar una colangiografía intraoperatoria de rutina.

Introduction: There is a global tendency to aging and associated pathologies. In Chile, the prevalence of cholecystolithiasis increases with age, cholecystectomy is one of the most frequent surgeries in the contry. There are few latinamerican studies regarding the reality of the elderly exposed to this problem. Objective: Study postoperative morbimortality in octogenarian patients undergoing cholecystectomy. Define the accuracy of different preoperative diagnostic tools, study operative variables and specify hospital costs. Materials and Method: Retrospective observational study of the Clinical Hospital of the University of Chile, between January 2012 and May 2017. Patients with age equal to or greater than 80 years were included, in whom an elective or emergency cholecystectomy was performed for benign pathology. Results: A total of 145 patients were included, 51.7% were women, the average age was 84.1 years, and 74.5% had comorbidities. The admission was throw the emergency department in 62.1% of the cases. Choledocholithiasis was diagnosed in 26.2% of the entire sample. Cholecystectomy was fully laparoscopic in 73.8% of the overall sample, the conversion rate was 14.5% in the emergency population and 1.8% in the elective population (p = 0.009). The population operated fully laparoscopically, that had choledocholithiasis, was resolved in 95.2% through Rendezvous technique, with a 100% clearance rate of common bile duct. The complication rate was 17.9%, most being medical. The surgical mortality was 2.1%, all cases operated from emergency. The average cost of hospital health care was $5,888,104.3 Chilean pesos (U$9.000). Conclusion: The octogenarian patient with cholecystolithiasis represents a surgical challenge, given a greater number of comorbidities, a more aggressive clinical setting and a high rate of choledocolithiasis. It is advisable to assess the minimally invasive approach and perform routine intraoperative cholangiography. In the postoperative period, the cardiopulmonary status and the infectious complications of the surgical site should be monitored closely.

Tratamiento médico o quirúrgico de la obstrucción intestinal alta / Medical or surgical treatment of small bowel obstruction

Introducción: La obstrucción intestinal (OI) es una causa frecuente de consulta en los servicios de urgencia. Los avances en los métodos de diagnósticos y la implementación de unidades de paciente crítico han logrado disminuir la morbimortalidad de esta afección. El proceso diagnóstico incluye desde la anamnesis y examen físico al uso de exámenes de laboratorio e imagenológicos para definir el mejor tratamiento en cada caso, ya sea médico o quirúrgico. Objetivo: Describir la respuesta al tratamiento médico o quirúrgico en pacientes con diagnóstico de OI alta en nuestro hospital.Materiales y métodos: Serie de casos retrospectiva de todos los casos egresados con diagnóstico de OI alta (parcial o completa) como diagnóstico primario, atendidos en el hospital desde enero de 2012 hasta mayo de 2014. Resultados: Hubo 134 casos incluidos, con 101 OI completas, 81 de ellas se resolvieron de forma quirúrgica. En las 20 restantes se decidió tratamiento médico, sin presentar este subgrupo mayor morbimortalidad asociada; sin embargo dada la evolución de estos pacientes se requirió en un 75% de los casos cirugía definitiva. Todas las OI parciales (33 casos), se resolvieron de forma conservadora, sin requerir cirugía. Conclusión: El tratamiento conservador de la OI no presentó mayores complicaciones que el tratamiento quirúrgico, por lo que se mantiene como una posibilidad válida de tratamiento teniendo en cuenta que es necesaria una vigilancia estricta para evitar mayor morbimortalidad. Sin embargo, esto no significa que operar o no operar sea lo mismo, siendo importante considerar la etiología de la OI.

Background: Small bowel intestinal obstruction (IO) is a frequent problem presenting in emergency rooms. Advances in diagnostic methods and the creation of intensive case units have diminished the morbidity and mortality of this disease. The diagnostic tool includes a careful clinical examination, the use of laboratory tests plus radiological procedures, which together allow to define the best treatment option for each patient wit IO. Aim: To report the response to medical or surgical treatment of patients with a small bowel IO. Material and methods: Review of a retrospective case series of 134 patients discharged from a clinical hospital with the primary diagnosis of small bowel intestinal obstruction between 2012 and 2014. Results: One hundred and one patients had a complete obstruction and 81 of these were treated surgically. In the remaining 20, a medical treatment was chosen, without observing a higher frequency of complications. However, 75% of these patients required surgery during their evolution. All partial obstructions were treated conservatively, without requiring surgery. Conclusion: Conservative treatment of intestinal obstruction is not associated with a higher rate of complications but requires a close clinical follow up. The etiology of the obstruction must be taken in consideration for decision making.

Número total de operaciones de patología digestiva alta en Chile año 2011 / Number of gastrointestinal surgical interventions performed in Chile during 2011

Background: There is paucity of information about the number of gastrointestinal surgical interventions in Chile. Aim: To report the number of gastrointestinal operations carried out in Chile during 2011. Material and Methods: Review of databases from the Department of Statistics and Health care information of the Ministry of Health. The two most common gastrointestinal surgical interventions and four highly complex interventions were selected. Results: The most common gastrointestinal intervention was cholecystectomy in 52.000 cases, followed by appendectomy in 37.000 cases. A gastrectomy for gastric cancer was performed in 1.032 cases, performing a total gastrectomy in 74 percent and with a 2.9 percent mortality. Esophagectomy was carried out in 42 patients with an overall mortality of 9.5 percent. A pancreatectomy for pancreatic cancer was performed in 102 patients (pancreatoduodenectomy in 68 percent), with an overall mortality of 5.9 percent. Bariatric surgery was performed in 2.834 cases (vertical gastrectomy in 70 percent and gastric bypass in 30 percent). Conclusions: Cholecystectomy was by far the most common surgical procedure performed. Esophagectomy and pancreatectomy were associated with a high mortality rate. Gastrectomy for gastric cancer had a low postoperative mortality.

Introducción: No hay datos oficiales sobre el número total de intervenciones quirúrgicas referentes a patología gastrointestinal alta. Objetivo: Conocer algunos datos estadísticos al respecto. Material y Método: Se obtuvo del Departamento de Estadísticas e Informaciones de Salud del Ministerio de Salud el total de intervenciones realizadas el año 2011 en Chile, seleccionando las 2 operaciones más frecuentes y 4 operaciones de alta complejidad definidas por la patología de base, la complejidad del acto quirúrgico y la mortalidad operatoria. Resultados: Después de la cesárea, la colecistectomía es la operación más frecuente (52.000 pacientes) seguida de la apendicectomía (37.000 pacientes). La gastrectomía por cáncer gástrico se realizó en 1.032 pacientes con una mortalidad operatoria global de 2,9 por ciento. La gastrectomía total se efectuó en 74 por ciento de los casos. La esofaguectomía se realizó en 42 pacientes con mortalidad global de 9,5 por ciento. La pancreatectomía por cáncer de páncreas se efectuó en 102 pacientes con una mortalidad global de 5,9 por ciento, siendo la pancreatoduodenectomía la intervención más frecuente (68 por ciento). La cirugía bariátrica comprende 2 operaciones con un total de 2.834 casos, con una proporción de 70 por ciento para la gastrectomía vertical y un 30 por ciento para el bypass gástrico. Conclusiones: La colecistectomía es la intervención quirúrgica no obstétrica más frecuente. La esofaguectomía y la pancreatectomía, se realizan en un bajo número de pacientes, siendo la mortalidad operatoria de ambos procedimientos alta. La gastrectomía por cáncer gástrico tiene una baja mortalidad operatoria. Se reporta por primera vez una cifra oficial referente al número de cirugías bariátricas.

Evolución durante 44 años de las característica morfológicas y sobrevida a largo plazo de 304 pacientes con cáncer gástrico incipiente / Early gastric cancer: a 44 years´ experience in 304 patients

Background: Early gastric cancer has a good long term prognosis. Aim: To report a 44 years’ experience in the management of early gastric cancer. Material and Methods: Retrospective and prospective analysis of patients with early gastric cancer, managed in three periods: group I from 1970 to 1989, group II from 1990 to 2003 and group III from 2004 to 2013. Tumor location in the stomach, macroscopic type, pathological type, lymph node involvement and long term survival were analyzed. Results: Three hundred four patients with a mean age of 62 years (170 males) were analyzed. Tumors were intramucosal and submucosal in 136 (45 percent) and 168 (55 percent) patients, respectively. Among group III proximal tumors anddiffuse pathological types weremore common. Five and 15 years survival were 88 and 72 percent, respectively. Conclusions: During the study period, tumor location and pathological types changed. Patients had high survival rates.

Introducción: El cáncer gástrico es una patología predominante en Chile. El carcinoma incipiente constituye una etapa inicial con muy buen pronóstico a largo plazo. El objetivo del presente estudio fue analizar las características morfológicas del carcinoma incipiente en 3 períodos de tiempo, con un período total de 44 años en un mismo centro, además de revisar la bibliografía nacional. Material y Método: Estudio mixto, tanto retrospectivo como prospectivo, desde 1970 hasta el año 2013, dividiendo a los pacientes en 3 grupos: grupo I desde 1970 hasta 1989, grupo II desde 1990 hasta 2003 y grupo III, desde 2004 hasta 2013. Se analizaron las siguientes variables: localización en el estómago, tipo macroscópico, tipo histológico, disección linfonodal y sobrevida a largo plazo. Para los cálculos estadísticos se empleó el Test de Fisher y c2. La sobrevida se analizó según el Test de Kaplan-Meier. Resultados: Hubo un total de 304 pacientes, que corresponden al 11,3 por ciento del total de pacientes resecados en el mismo período de tiempo. Hubo 136 pacientes con carcinoma mucoso (44,7 por ciento) y 168 con carcinoma submucoso (55,3 por ciento). Se observó un aumento estadísticamente significativo de la localización proximal del tumor. Hubo un aumento significativo del tipo histológico difuso en el III período analizado. La sobrevida a 15 años plazo fue mayor al 70 por ciento. Conclusiones: En 44 años se apreció un cambio en la localización del carcinoma incipiente y en el tipo histológico. La sobrevida alejada a 15 años es muy buena.

Experiencia clínica en segundos cánceres primarios / Second primary cancer: review of 196 cases

Background: A second primary cancer is that occurring in patients who have survived a previous cancer and its frequency is 16 percent. Aim: To identify and characterize patients with a second primary cancer treated in a clinical hospital. Material and methods: Review of the database of the Clinical Oncology Unit of a surgical department between 2004 and 2012. Among 4,007 patients operated for cancer, 196 (mean age 63 years, 51 percent women) had a previous history of cancer, whose medical records were reviewed. Results: In the study period the frequency of a second primary cancer in endocrinological, thoracic and digestive surgery was 4.9 percent. There was a mean lapse of 8.2 years between the first and second cancer and 24 percent of patients had a family history of cancer. The second primary lesions were located in colon in 26 percent, stomach in 19 percent, thyroid in 16 percent, rectum in 12 percent, pancreas in 8 percent and lung in 8 percent. Sixty five percent of lesions was diagnosed in stage IV with peritoneal and lung metastases in 38 and 25 percent respectively. Conclusions: Second primary cancer is uncommon in this series. The high frequency of colon cancer must be highlighted. Due to the lapse between the first and second tumor, follow up of patients treated for cancer should be maintained for at least eight years.

Introducción: El segundo cáncer primario (SCP) es aquel ocurrido en pacientes sobrevivientes de cáncer y tiene una frecuencia de 16 por ciento según Surveillance Epidemiology and End Results. Objetivo: Identificar y caracterizar a los pacientes con SCP en nuestro hospital entre los años 2004 y 2012. Materiales y métodos: Estudio observacional descriptivo retrospectivo. Revisión en base de datos registrados en la Unidad de Oncología Clínica del Departamento de Cirugía entre 2004-2012. De un total de 4.007 pacientes operados por cáncer, se identificaron 196 con antecedentes previos de cáncer. Revisión de fichas Clínicas, Registro en programa Excel y análisis en sistema Stata v11. Resultados: El SCP en cirugía endocrinológica, torácica, coloproctológica y digestiva tiene una frecuencia de 4,9 por ciento en el período estudiado. La edad promedio de presentación es 63 años, 51 por ciento mujeres y 48 por ciento varones. Intervalo promedio de 8,2 años entre el primer y el segundo cáncer. 23,47 por ciento tenía antecedentes familiares. Los pacientes presentaron cáncer de colon en un 26,02 por ciento, seguido de cáncer gástrico 18,88 por ciento, cáncer de tiroides 15,8 por ciento, cáncer de recto 11,73 por ciento, cáncer de páncreas 8,16 por ciento, cáncer de pulmón 7,65 por ciento. El 65,5 por ciento fue diagnosticado en etapa IV, siendo las metástasis más frecuentes al peritoneo (37,5 por ciento) y pulmón (25 por ciento). Conclusión: El segundo primario es una entidad poco frecuente en nuestro medio, destacando la alta incidencia de cáncer de colon. El intervalo de presentación sugiere mantener un seguimiento prolongado de al menos 8 años.

Omentobursectomía en cáncer gástrico: controversias actuales / Bursectomy and omentectomy in the surgical treatment of gastric cancer

There is controversy about the usefulness of bursectomy and omentectomy during the surgical treatment of gastric cancer. Bursectomy, a procedure dissecting the peritoneal lining covering the pancreas and the anterior plane of the transverse mesocolon, is a major surgical aggression. There is no evidence that the procedure improves five years survival. It may be useful in serosal gastric cancer of the posterior wall. Excision or resection of all or part of an omentum does not have either an effect on survival. However, we recommend its use since its lack of benefit has not been completely ascertained.

Dentro de las etapas quirúrgicas de la gastrectomía por cáncer gástrico, existen controversias respecto a la bursectomía y la omentectomía. La bursectomía (resección de peritoneo que cubre la porción anterior del mesocolon transverso y la cápsula pancreática) representa una mayor agresión quirúrgica, sin evidencia actual de que aumenta la sobrevida a 5 años, ello evaluado en 3 estudios clínicos. Su utilidad parece estar en pacientes con cáncer gástrico seroso de la cara posterior. La omentectomía total, comparada con la omentectomía parcial, ha sido evaluada más extensamente, sin poder demostrar hasta la actualidad la superioridad de uno u otro procedimiento en cuanto a sobrevida a 5 años. Sin embargo, mientras no se demuestre claramente lo opuesto en estudios científicos, recomendamos realizarla rutinariamente.

Reconstitución de tránsito esofágico con interposición de colon derecho / Esophageal reconstruction using right colon interposition

Background: Esophageal replacement therapy is indicated for benign and malignant esophageal lesions and can be performed using stomach, jejunum or colon. Aim: To report the experience using right colon interposition for esophageal replacement. Material and Methods: Review of medical records of 41 patients aged 17 to 73 years (29 males), subjected to right colon interposition in the last 20 years. Indications, complications, mortality and long term results were recorded. Results: Forty nine percent of patients had a malignant esophageal lesion. Esophagectomy was performed using a transhiatal route or thoracotomy in 44 and 30 percent of patients, respectively. Retroesternal ascension was the most common route used in 88 percent of patients. The most common surgical complication was cervical fistula in 29 percent of patients, followed by fistula of the anastomosis between colon and jejunum in 7 percent of patients. Pneumonia was the most common medical complication. Postoperative mortality was 7 percent. Conclusions: The mortality in this series of patients is similar to that reported elsewhere.

Introducción: La cirugía de reemplazo esofágico actualmente se indica para tratamiento de enfermedades benignas y malignas del esófago. Existen diversas técnicas de reconstitución de tránsito esofágico que utilizan estómago, yeyuno o colon. Objetivo: Presentar la experiencia acumulada en el Hospital Clínico de la Universidad de Chile utilizando la técnica de transposición de colon derecho para la reconstitución de tránsito esofágico. Materiales y Métodos: Estudio descriptivo restrospectivo que incluyó a los pacientes sometidos a reconstitución de tránsito esofágico mediante interposición de colon derecho, durante los últimos 20 años, basado en la revisión sistemática de historias clínicas, analizando causas, morbilidad precoz y tardía, mortalidad operatoria, compararándolos con los resultados de la literatura. Resultados: Se incluyen 41 pacientes operados, con edad promedio de 63,6 años (17-73), 29 de ellos de sexo masculino (70,7 por ciento). El 48,7 por ciento correspondieron a neoplasias malignas, el resto a patología benigna. En 43,9 por ciento la esofaguectomía se realizó por vía transhiatal y 29,7 por ciento por toracotomía. El ascenso retrosternal fue la vía más empleada (87,8 por ciento). La complicación más frecuente correspondió a la fístula cervical en 29,3 por ciento seguida de la fistula en colo-yeyuno anastomosis en el 7,3 por ciento de los casos. La neumonía fue la complicación médica más frecuente (14,7 por ciento). La mortalidad postoperatoria fue 7,3 por ciento. Conclusión: El uso de interposición de colon derecho tiene indicaciones precisas. La mortalidad operatoria reportada se ajusta a lo encontrado en la literatura internacional.

¿Cuándo se indica y cuáles son los resultados a largo plazo de la cirugía en Enfermedad por Reflujo Gastroesofágico sin hernia hiatal verdadera? / When is GERD surgery indicated and which are their results in the long-term?

Introduction: Laparoscopic Nissen fundoplication is the most used technique in Gastroesophageal Reflux Disease (GERD) patients. Objectives: Review publications on long-term results (10 or more years) for this surgery. Method: Bibliographic research of literature in English language of all articles regarding this topic. Results: A total of 10 articles were found with results for a period of 10 years or more. Recurrence of heartburn was observed in 20-23 percent; post-fundoplication symptoms such as meteorism was observed in 47 percent. After 10 years, approximately 30 percent started using proton-pump inhibitors (PPIs) and another surgery was needed in 9 percent. Six articles showed no objective assessment of surgical results. One article assessed radiology only in some cases. Only 3 European articles performed objective assessments, with endoscopy and only one assessed results with 24-hour esophageal pH test. Conclusions: Nissen fundoplication is a surgical technique for controlling GERD in 75 percent of patients 10 years or more after surgery. However, very few articles present objective assessments; in most publications, assessments are subjective and made based on symptoms.

Introducción: La fundoplicatura de Nissen por vía laparoscópica es la técnica más empleada en pacientes con enfermedad por reflujo gastroesofágico (ERGE). Objetivo: Revisar las publicaciones referentes a los resultados alejados (10 o más años) de esta cirugía. Método: Se realizó una búsqueda bibliográfica en la literatura inglesa de todos los artículos referentes a este tema. Resultados: Se encontraron en total 10 trabajos relacionados con los resultados a más de 10 años. La recurrencia de la pirosis se presentó entre 20 a 23 por ciento, la aparición de síntomas post-fundoplicatura, como el meteorismo, en 47 por ciento. A los 10 años, cerca de 30 por ciento comenzó a ingerir nuevamente inhibidores de la bomba de protones y hubo necesidad de una reoperación en 9 por ciento. En 6 trabajos no hubo ninguna evaluación objetiva de los resultados quirúrgicos. En 1 trabajo sólo evaluaron radiología en algunos casos. Sólo en 3 trabajos europeos se realizaron evaluaciones objetivas, con endoscopia y sólo 1 evaluó los resultados con pHmetría de 24 h. Conclusiones: La fundoplicatura de Nissen es una técnica quirúrgica que controla los síntomas de la ERGE en 75 por ciento de los pacientes a más de 10 años de la cirugía. Sin embargo, muy pocos trabajos efectúan evaluaciones objetivas, en la mayoría de las publicaciones, las evaluaciones son sólo sintomáticas y subjetivas.