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Introducción. El cáncer colorrectal es uno de los tipos de cáncer más comunes y mortales a nivel mundial. Aunque los avances médicos han mejorado el manejo, la cirugía sigue siendo fundamental. La resección anterior baja (RAB) de recto ha ganado relevancia, a pesar de que puede llevar al síndrome de resección anterior baja de recto (LARS, por sus siglas en inglés), afectando la calidad de vida. Métodos. Estudio de corte transversal con intención analítica en un centro de referencia en Medellín, Colombia. Los pacientes con cáncer de recto sometidos a RAB entre enero de 2016 y diciembre de 2022 completaron el cuestionario LARS para evaluar disfunción intestinal. Se evaluaron factores relacionados con la presencia de LARS por medio de un análisis bivariado. Resultados. De 234 pacientes elegibles, 110 (47 %) respondieron la encuesta, predominantemente mujeres (58,2 %). La edad promedio fue 62 años. Dos tercios de los pacientes recibieron neoadyuvancia y el 69 % requirieron ileostomía. La prevalencia de LARS fue 47,3 %. El 80,9 % llevaban más de 12 meses desde la cirugía o el cierre del estoma. Factores estadísticamente significativos asociados a LARS fueron edad mayor de 65 años (p=0,03), estadío patológico avanzado (p=0,02) y requerimiento de estoma (p=0,03). Conclusiones. El LARS afecta a casi la mitad de los pacientes en diferentes etapas posquirúrgicas. El LARS scorees una herramienta práctica para evaluar la función intestinal en el seguimiento del paciente. La prevalencia y los factores de riesgo identificados contribuyen a la comprensión del impacto de la cirugía conservadora del esfínter en la calidad de vida de los pacientes.

Introduction. Colorectal cancer is one of the most common and deadly types of cancer worldwide, with a high incidence of rectal cancer. Although medical advances have improved management, surgery remains crucial. Low anterior resection of the rectum (LAR) has gained significance, despite its potential to lead to low anterior resection syndrome (LARS), affecting quality of life. Methods. A cross-sectional study with analytical intent was conducted at a referral center in Medellín, Colombia. Patients with rectal cancer who underwent LAR between January 2016 and December 2022 completed the LARS questionnaire to assess intestinal dysfunction. Factors related to the presence of LARS were analyzed using bivariate analysis. Results. Of 234 eligible patients, 110 (47%) responded, predominantly women (58.2%). The average age was 62 years. Two-thirds of patients received neoadjuvant therapy and 69% required ileostomy. The prevalence of LARS was 47.3%. 80.9% had been more than 12 months post-surgery or stoma closure. Statistically significant factors associated with LARS included age over 65 years (p=0.03), advanced pathological stage (p=0.02), and stoma requirement (p=0.03). Conclusions. LARS affects almost half of the patients in various post-surgical stages. The LARS score is a practical tool for assessing intestinal function in patient follow-up. The prevalence and risk factors identified contribute to the understanding of the impact of sphincter-conserving surgery on patients' quality of life.

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BACKGROUND AND AIMS: Single-operator cholangioscopy (SOC) offer a diagnostic and therapeutic alternative with an improved optical resolution over conventional techniques; however, there are no standardized clinical practice guidelines for this technology. This evidence-based guideline from the Colombian Association of Digestive Endoscopy (ACED) intends to support patients, clinicians, and others in decisions about using in adults the SOC compared to endoscopic retrograde cholangiopancreatography (ERCP), to diagnose indeterminate biliary stricture and to manage difficult biliary stones. METHODS: ACED created a multidisciplinary guideline panel balanced to minimize potential bias from conflicts of interest. Universidad de los Andes and the Colombia Grading of Recommendations Assessment, Development and Evaluation (GRADE) Network supported the guideline-development process, updating and performing systematic evidence reviews. The panel prioritized clinical questions and outcomes according to their importance for clinicians and patients. The GRADE approach was used, including GRADE Evidence-to-Decision frameworks. RESULTS: The panel agreed on one recommendation for adult patients with indeterminate biliary strictures and one for adult patients with difficult biliary stones when comparing SOC versus ERCP. CONCLUSION: For adult patients with indeterminate biliary strictures, the panel made a conditional recommendation for SOC with stricture pattern characterization over ERCP with brushing and/or biopsy for sensitivity, specificity, and procedure success rate outcomes. For the adult patients with difficult biliary stones the panel made conditional recommendation for SOC over ERCP with large-balloon dilation of papilla. Additional research is required on economic estimations of SOC and knowledge translation evaluations to implement SOC intervention in local contexts.

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Post-colonoscopy colorectal cancer (PCCRC) is a tumor that appears after a normal colonoscopy before the established time for the endoscopic follow up. Its origin reflects the quality of the colonoscopy and the different tumoral biologics between the CRC and the CRCPC. Our aim is to describe the characteristics of the PCCRC in our region, to identify risk factors, to discriminate the potential causes according to the World Endoscopý Organization (WEO) and to determine its impact in the patient's survival. We studied patients with colorectal cancer (CRC) attended at the gastro-oncology clinic of two institutions of Medellin-Colombia, between January 2012 and December 2021 that had been submitted to a colonoscopy between 6-36 months before the colonoscopy in which the CRC was diagnosed. 919 patients during 10 years for CRC, 68 cases of PCCRC (6.9%); It was more frequent in older patients (74 vs. 66 years; p=0.03), with background of adenomatous polyps (36.8% vs. 20.1%; p=0.01) and in right colon (57.4% vs. 40.6%; p=0.006), with a tendency in patients with diverticulosis (41.2% vs. 31.3%; p=0.05) and diabetes (25% vs. 14%; p=0.06); less survival at 5 and 10 years (58% and 55.2% vs. 67% and 63%; p < 0.001). According to the WEO, the PCCRC presents in 61.3% because of abnormal findings omitted in inadequate colonoscopies, 29% in a suitable colonoscopy and 9.7% incomplete resections of adenomas. In conclusion, the rate of PCCRC was 6.9% with more propension in older patients, a background of polyp resection, and proximal colon. According to the WEO, the abnormal findings omitted more frequently were related with inadequate colonoscopies. The patients with PCCRC had less survival.

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Cáncer colorrectal post-colonoscopia (CCRP) es el tumor que aparece posterior a una colonoscopia normal antes de cumplirse el tiempo establecido para seguimiento endoscópico. Origen multifactorial, refleja la calidad de la colonoscopia y las diferentes biologías tumorales entre los cánceres colorrectales detectados (CCRD) y el CCRP. Nuestro objetivo es describir las características del CCRP en nuestro medio, identificar factores de riesgo, discriminar sus causas según la Organización Mundial de Endoscopia (OME) y determinar el efecto en la sobrevida del paciente. El estudio se realizó en pacientes con cáncer-colorrectal (CCR) atendidos en consulta de gastro-oncología de dos instituciones en Medellín-Colombia, entre enero de 2012 y diciembre de 2021 que se habían sometido a una colonoscopia en los 6 a 36 meses anteriores a la colonoscopia en la que se diagnosticó el CCR. 919 pacientes durante 10 años por CCR, 68 casos de CCRP (6,9%), se encontró que se presenta con más frecuencia en pacientes mayores (74 vs. 66 años; p=0,03), con antecedentes de pólipos adenomatosos (36,8% vs. 20,1%; p=0,01) y en colon derecho (57,4% vs. 40,6%; p=0,006), con una tendencia en pacientes con diverticulosis (41,2% vs. 31,3%; p=0,05) y diabetes (25% vs. 14%; p=0,06); menor sobrevida a 5 y 10 años (58%-55,2% vs. 67%-63%; p<0,001). Según la OME, los CCRP se presentaron en 61,3% por lesiones omitidas en colonoscopias inadecuadas, 29% colonoscopias adecuadas y 9,7% resecciones incompletas de adenomas. En conclusión, la tasa de CCRP fue de 6,9%, con mayor propensión en pacientes de mayores, antecedente de resección de pólipos, y en colon derecho. Acorde a la OME, las lesiones omitidas más frecuentemente se relacionaron con colonoscopias inadecuadas. Los pacientes con CCRP tienen menor sobrevida.

Post-colonoscopy colorectal cancer (PCCRC) is a tumor that appears after a normal colonoscopy before the established time for the endoscopic follow up. Its origin reflects the quality of the colonoscopy and the different tumoral biologics between the CRC and the CRCPC. Our aim is to describe the characteristics of the PCCRC in our region, to identify risk factors, to discriminate the potential causes according to the World Endoscopý Organization (WEO) and to determine its impact in the patient's survival. We studied patients with colorectal cancer (CRC) attended at the gastro-oncology clinic of two institutions of Medellin-Colombia, between January 2012 and December 2021 that had been submitted to a colonoscopy between 6-36 months before the colonoscopy in which the CRC was diagnosed. 919 patients during 10 years for CRC, 68 cases of PCCRC (6.9%); It was more frequent in older patients (74 vs. 66 years; p=0.03), with background of adenomatous polyps (36.8% vs. 20.1%; p=0.01) and in right colon (57.4% vs. 40.6%; p=0.006), with a tendency in patients with diverticulosis (41.2% vs. 31.3%; p=0.05) and diabetes (25% vs. 14%; p=0.06); less survival at 5 and 10 years (58% and 55.2% vs. 67% and 63%; p<0.001). According to the WEO, the PCCRC presents in 61.3% because of abnormal findings omitted in inadequate colonoscopies, 29% in a suitable colonoscopy and 9.7% incomplete resections of adenomas. In conclusion, the rate of PCCRC was 6.9% with more propension in older patients, a background of polyp resection, and proximal colon. According to the WEO, the abnormal findings omitted more frequently were related with inadequate colonoscopies. The patients with PCCRC had less survival.

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Introducción. La estenosis colorrectal benigna hace referencia a una condición anatómica caracterizada por una disminución del diámetro de la luz intestinal distal a la válvula ileocecal, ocasionando una serie de signos y síntomas de tipo obstructivo. Es una entidad poco frecuente, secundaria en la gran mayoría de veces a la realización de anastomosis intestinales al nivel descrito. El objetivo de esta investigación fue determinar la utilidad del stentcolónico en estenosis secundaria a patología colorrectal no neoplásica. Métodos. Estudio descriptivo de una cohorte de pacientes que desarrolló estenosis colorrectal de origen benigna confirmada por colonoscopía, en 3 hospitales de alta complejidad de la ciudad de Medellín, Colombia, entre los años 2007 y 2021. Resultados. Se incluyeron 34 pacientes con diagnóstico de estenosis colorrectal de origen benigno, manejados con stents metálicos autoexpandibles. La mediana de seguimiento fue de 19 meses y se obtuvo éxito clínico en el 73,5 % de los casos. La tasa de complicación fue del 41,2 %, dada principalmente por reobstrucción y migración del stent, y en menor medida por perforación secundaria a la colocación del dispositivo. Conclusión. Los stents metálicos autoexpandibles representan una opción terapéutica en pacientes con obstrucción colorrectal, con altas tasas de mejoría clínica en pacientes con patología estenosante no maligna. Cuando la derivación por medio de estoma no es una opción, este tipo de dispositivos están asociados a altas tasas de éxito clínico y mejoría de la calidad de vida de los pacientes

Introduction. Benign colorectal stenosis refers to an anatomical condition characterized by a decrease in the diameter of the intestinal lumen distal to the ileocecal valve, which might cause a series of obstructive signs and symptoms. It is a rare entity, caused in the vast majority of cases due to intestinal anastomosis at the described level. The purpose of this study is to determine the performance of colonic stents in the management of non-malignant colorectal strictures. Methods. Descriptive study of a cohort of patients who developed a benign colorectal stenosis confirmed by colonoscopy in three high-complexity hospitals in the city of Medellín, Colombia, between 2007 and 2021. Results. Thirty-four patients diagnosed with benign colorectal stenosis managed with self-expanding metal stents were included in the study. Median follow-up was 19 months, obtaining clinical success in 73.5% of cases, with a complication rate of 41.2%, mainly due to reobstruction and migration of the stent, and to a lesser extent due to perforation secondary to device placement.Conclusion. Self-expanding metallic stents represent a therapeutic option in patients with colorectal obstruction caused by non-malignant stenosing pathology. When diversion through a stoma is not an option, this type of device is associated with high rates of clinical success and improvement in the patients' quality of life

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BACKGROUND: Proctocolectomy with ileal reservoir is the surgical procedure of choice for patients with ulcerative colitis and familial adenomatous polyposis. OBJECTIVES: To evaluate long-term postoperative complications (1994-2019) in patients operated for familial adenomatous polyposis (FAP) and ulcerative colitis (UC) and the degree of satisfaction with the procedure. METHODS: Observational study based on the analysis of a retrospective database with prospective follow-up in 115 consecutive patients: 79 with UC and 36 with FAP. A total of 88 patients were followed up, 60 with UC and 28 with PFA. RESULTS: 48 males (54.4%) with a mean age of 44.8 ± 10.6 years were evaluated. Indications for surgery were intractable disease in 54 patients (47%), dysplasia/cancer in 43 (37%), severe bleeding in 4 (4%) and perforation in 3 (3%). A proctectomy and mucosectomy of the rectal stump was performed in 67 (76.1%), and a double stapling technique in 21. A protective ileostomy was performed in all patients with UC and FAP. No differences were found in early complications between the two groups. Late complications showed a higher rate of reservoritis in UC patients compared to FAP (44.9 vs. 14.3%, p = 0.001), with more refractory reservoritis in the UC group (13.3 vs. 0%, p = 0.04) with no differences in bowel obstruction, strictures, or anastomotic fistulas. Overall satisfaction and adaptation were considered good in 87% of UC patients and only 57% in the FAP group (p < 0.01). CONCLUSIONS: Proctocolectomy with ileal reservoir has comparable morbidity and mortality, except for the higher rate of reservoritis in patients with a history of UC, despite this contingency there is a better quality of life and greater acceptance of surgery in UC patients than in FAP patients.

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Resumen Los hamartomas quísticos retrorrectales (tailgut cyst) son tumores congénitos multiloculados, poco frecuentes y derivados de remanentes embrionarios posanales que a menudo no se diagnostican debido a su rara incidencia, localización anatómica y su presentación clínica inespecífica. Presentamos el caso de un paciente de 21 años con historia de fístula perianal que fue intervenida, pero presentó recidiva y en la resonancia se encontró el hamartoma quístico. El tratamiento definitivo fue la resección completa de la lesión por vía posterior (Kraske-Mason).

Abstract Retrorectal Cystic Hamartoma (tailgut cyst [TGC]) are uncommon, multiloculated congenital tumors derived from embryonic post-anal or tail gut remnants often undiagnosed due to their rare incidence, anatomical location, and non-specific clinical presentation. We presented a 21-year-old patient with a perianal fistula history who underwent surgery. Nonetheless, she showed recurrence, and the cystic hamartoma was found in the resonance imaging. Therefore, the definitive treatment was complete resection of the lesion by posterior approach (Kraske-Mason).

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Stomach cancer (SC) incidence and mortality are relevant public health issues worldwide. In Colombia, screening for preneoplastic lesions (PNL) and the presence of H. pylori is not routinely performed. Therefore, the aim of this study was to evaluate OLGA-OLGIM staging and the interobserver agreement in gastritis and preneoplastic lesions in patients with gastroduodenal symptoms from Colombia. A cross-sectional study was conducted in 272 patients with gastroduodenal symptoms. Gastric biopsies were taken following the Updated Sydney System with the OLGA-OLGIM classification, and the results were evaluated by two pathologists. Chronic gastritis and PNL were reported in 76% and 24% of the patients, respectively. Furthermore, 25% of the patients with PNL displayed gastric atrophy (GA) and 75% intestinal metaplasia (IM). Agreement in the histopathological reading for IM was good, whereas for OLGA was variable, and for the H. pylori quantity was poor. OLGA-OLGIM stages 0-II were the most frequent (96%), while stage III (4%) and SC (4%) were the least frequent. Age and coffee consumption were associated with a higher prevalence of PNL. This work determined that 4% of the population is at high risk of developing SC and would benefit from follow-up studies. Reinforcement of training programs to improve the agreement in histopathology readings is required.

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OBJECTIVES: The scarce existing literature suggests having a lower rate of anastomotic leakage and less late stricture formation after stapled esophagogastric anastomosis compared to the manual anastomosis technique. The aim of the present study is to compare the surgical outcomes of termino-lateral manual cervical anastomosis versus mechanical anastomosis by later lateral stapling, after transhiatal esophagectomy for cancer. MATERIALS AND METHODS: A retrospective review of patients undergoing transhiatal esophagectomy with manual or mechanical anastomosis for neoplasia was performed at three institutions in Medellin, between 2011 and 2018. Endpoints included leak rate, morbidity, mortality, hospital stay, and endoscopically identified anastomotic strictures requiring dilatation. RESULTS: 68 patients (40 men, 59%) were evaluated, 37 with manual anastomosisand 31 with mechanical anastomosis with similar demographic characteristics. Anastomotic leaks occurred in 13 patients (19.1%), with no difference found between manual and mechanical anastomosis (18.9 vs. 19.3%; p=0.93). Overall morbidity (61%), in-hospital mortality (3%) and length of hospital stay (median 12 days) were not affected by anastomotic technique. Follow-up endoscopic evaluation was available in all patients and anastomotic stricture associated or not with leak was detected in 18 patients (22%), in cases of stricture without leak is more frequent with manual than mechanical anastomosis technique (21.6 vs 6.4%; p=0.07) with longer duration of surgical procedure in case of manual anastomosis (p=0.05). CONCLUSIONS: Our non-randomized study suggests that the manual anastomosis technique results in a shorter surgical time and a lower stricture rate than mechanical anastomosis in cervical esophagogastric reconstruction after transhiatal esophagectomy, with a similar rateof leakage, hospital stay and morbidity and mortality.

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Introducción. El pilar fundamental del tratamiento del cáncer colorrectal es la cirugía, situación que expone a los pacientes a la posible presentación de complicaciones, morbimortalidad, pobre calidad de vida, recurrencia tumoral o la muerte. El objetivo de este estudio fue determinar las variables clínicas y quirúrgicas que inciden en el riesgo de la aparición de complicaciones en los pacientes con cáncer colorrectal llevados a cirugía electiva entre los años 2016 y 2019. Métodos. Estudio observacional, descriptivo, transversal y retrospectivo. Se incluyeron pacientes mayores de 18 años con cáncer colorrectal sometidos a cirugía electiva. Se realizó un análisis multivariado para determinar los factores que se relacionan con las complicaciones postquirúrgicas. Resultados. Se incluyeron 298 pacientes, 68 % mayores de 60 años, 52,3 % mujeres, 74,2 % presentaban comorbilidades y 48,3 % fueron diagnosticados en estadio III. El 48,3 % presentó complicaciones postoperatorias. De ellos, el 68,1 % no tenía tamización nutricional y el 61,8 % no tenía preparación del colon; un 55 % fueron cirugías del recto, 69,1 % de las cirugías fueron por vía laparoscópica y 71,8 % presentaron sangrado inferior a 500 ml. La mayoría de las complicaciones fueron clasificadas como Clavien-Dindo I-III. Discusión. Las características de los pacientes fueron similares a los presentados en otros estudios, aunque hubo mayor incidencia de íleo postoperatorio. El análisis multivariado mostró una mayor probabilidad de presentar una complicación en pacientes con diabetes mellitus, hipertensión arterial, falta de tamización nutricional o preparación de colon, cirugía de recto y el sangrado mayor a 500 ml

Introduction. The fundamental pillar of colorectal cancer treatment is surgery, a situation that exposes patients to the possible presentation of complications, morbidity and mortality, poor quality of life, tumor recurrence or death. The objective of this study was to determine the clinical and surgical variables that affect the risk of the appearance of complications in colorectal cancer patients taken to elective surgery between 2016 and 2019.Methods. Observational, descriptive, cross-sectional and retrospective study. Patients over the age of 18 with colorectal cancer undergoing elective surgery were included. A multivariate analysis was performed to determine the factors related to postsurgical complications. Results. We included 298 patients, 68% over 60 years of age, 52.3% women, 74.2% had comorbidities and 48.3% were diagnosed in stage III. 48.3% presented postoperative complications; of these, 68.1% had no nutritional screening, and 61.8% had no colon preparation; 55% were rectal cancer surgeries, 69.1% underwent laparoscopic surgeries, and 71.8% had bleeding less than 500 ml. Most complications were classified as Clavien Dindo I-III. Discussion. The characteristic of the patients was similar to those presented in other studies, even though we had more incidence of postoperative ileus. The multivariate analysis showed a higher probability of complications in patients with: diabetes, hypertension, lack of nutritional screening, bleeding over 500cc, lack of colon mechanical preparation and rectal cancer surgery.Patient characteristics were similar to those presented in other studies, although there was a higher incidence of postoperative ileus. The multivariate analysis showed a greater probability of presenting a complication in patients with diabetes mellitus, arterial hypertension, lack of nutritional screening, colon preparation, rectal cancer surgery, and bleeding greater than 500 ml

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Objetivos : La escasa literatura existente sugiere haber una menor tasa de fugas anastomóticas y una menor formación tardía de estenosis después de la anastomosis esofagogástrica con grapas comparada con la técnica de anastomosis manual. El objetivo del presente estudio es comparar los resultados quirúrgicos de la anastomosis cervical manual termino-lateral versus la anastomosis mecánica por grapado laterolateral luego de una esofagectomía transhiatal por cáncer. Materiales y métodos : Se realizó una revisión retrospectiva de los pacientes sometidos a esofagectomía transhiatal con anastomosis manual o mecánica por neoplasia en tres instituciones de Medellín, entre 2011 y 2018. Los criterios de valoración incluyeron la tasa de fuga anastomótica, la morbilidad, la mortalidad, la estancia hospitalaria y anastomóticas identificadas las estenosis por endoscopia que requirieran dilatación. Resultados : se evaluaron 68 pacientes (40 hombres, 59%), 37 con anastomosis manual y 31 con anastomosis mecánica con características demográficas similares. Se produjeron fugas anastomóticas en 13 pacientes (19,1%), sin encontrarse una diferencia entre la anastomosis manual y mecánica (18,9 frente a 19,3%; p = 0,93). La morbilidad global (61%), la mortalidad intrahospitalaria (3%) y la duración de la estancia hospitalaria (mediana de 12 días) no se vieron afectadas por la técnica anastomótica. Se dispuso de una evaluación endoscópica de seguimiento en todos los pacientes y se detectó una estenosis anastomótica asociada o no a fugas de la anastomosis en 18 pacientes (22%), los casos de estenosis sin fuga fueron más frecuente con la técnica de anastomosis manual que la mecánica (21,6 vs 6,4%; p=0,07) con una duración mayor del procedimiento quirúrgico en caso de la anastomosis manual (p=0,05). Conclusiones : Nuestro estudio no aleatorizado sugiere que la técnica de anastomosis mecánica cursa con un tiempo quirúrgico menor y una menor tasa de estenosis que la anastomosis manual en la reconstrucción esofagogástrica cervical tras la esofagectomía transhiatal, con una tasa de fuga anastomótica, estancia hospitalaria y morbimortalidad similares.

Objectives : The scarce existing literature suggests having a lower rate of anastomotic leakage and less late stricture formation after stapled esophagogastric anastomosis compared to the manual anastomosis technique. The aim of the present study is to compare the surgical outcomes of termino-lateral manual cervical anastomosis versus mechanical anastomosis by later lateral stapling, after transhiatal esophagectomy for cancer. Materials and methods : A retrospective review of patients undergoing transhiatal esophagectomy with manual or mechanical anastomosis for neoplasia was performed at three institutions in Medellin, between 2011 and 2018. Endpoints included leak rate, morbidity, mortality, hospital stay, and endoscopically identified anastomotic strictures requiring dilatation. Results : 68 patients (40 men, 59%) were evaluated, 37 with manual anastomosis and 31 with mechanical anastomosis with similar demographic characteristics. Anastomotic leaks occurred in 13 patients (19.1%), with no difference found between manual and mechanical anastomosis (18.9 vs. 19.3%; p=0.93). Overall morbidity (61%), in-hospital mortality (3%) and length of hospital stay (median 12 days) were not affected by anastomotic technique. Follow-up endoscopic evaluation was available in all patients and anastomotic stricture associated or not with leak was detected in 18 patients (22%), in cases of stricture without leak is more frequent with manual than mechanical anastomosis technique (21.6 vs 6.4%; p=0.07) with longer duration of surgical procedure in case of manual anastomosis (p=0.05). Conclusions : Our non-randomized study suggests that the manual anastomosis technique results in a shorter surgical time and a lower stricture rate than mechanical anastomosis in cervical esophagogastric reconstruction after transhiatal esophagectomy, with a similar rate of leakage, hospital stay and morbidity and mortality.

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Resumen Antecedentes: la cirugía transanal endoscópica es un abordaje mínimamente invasivo recientemente descrito, que provee una exposición superior y permite el acceso a las lesiones del recto en toda su extensión. Además, provee un riesgo menor de compromiso de los márgenes de resección, menores tasas de recurrencia y una menor morbimortalidad en comparación con la escisión transanal convencional o las remociones endoscópicas. Objetivos: se pretende describir la experiencia inicial y los resultados con la cirugía transanal mínimamente invasiva (transanal minimally invasive surgery, TAMIS) en términos de resecciones completas y posibles complicaciones relacionadas con el procedimiento. Materiales y métodos: esta una serie de casos con un seguimiento prospectivo de los pacientes con TAMIS. Se analizaron los resultados de 27 pacientes intervenidos en varios centros de Medellín, Colombia, entre enero de 2012 y diciembre de 2016, realizados con cirugía laparoscópica monopuerto (single-port laparoscopic surgery, SILS) (21 casos) o el GelPOINT® Path (6 casos), junto con el apoyo de la óptica del laparoscopio (16 pacientes) y del endoscopio flexible (11 pacientes). Resultados: se realizaron 27 TAMIS en el mismo número de pacientes, 10 mujeres (37 %) y 17 hombres fueron evaluados. Se realizó un seguimiento a los pacientes durante aproximadamente 12 meses, en promedio 32 meses. La edad promedio fue de 68 años (52-83 años). El tamaño promedio del tumor fue de 5,3 cm (2-9 cm) y la distancia promedio desde el margen anal fue de 7 cm (5-9 cm) Las complicaciones posoperatorias se dieron en 6 casos (22 %) Una perforación rectal se corrigió por vía laparoscópica en el mismo acto quirúrgico y otra por la misma vía transanal. Una estenosis rectal se manejó con dilatación digital, y hubo un caso de sangrado rectal menor, uno de retención urinaria y un paciente presentó un cáncer rectal avanzado a los tres meses de la resección con margen microscópico positivo (4 %). No hubo reingresos. La mortalidad por la intervención fue nula. La patología operatoria reportó la presencia de adenoma de bajo grado en 3 casos (11 %), de alto grado en 11 (41 %), adenocarcinoma in situ en 6 (22 %), tumor neuroendocrino en 5 pacientes (18 %), 1 caso de fibrosis cicatricial (4 %) y 1 de leiomioma (4 %). Limitaciones: los resultados no son extrapolables a la población general debido al poco número de intervenciones y la ejecución limitada a solo dos autores. Conclusiones: en nuestra experiencia inicial, TAMIS es un procedimiento mínimamente invasivo con una baja morbilidad posoperatoria, es curativa para lesiones benignas y para pacientes seleccionados con cáncer temprano.

Abstract Background: Transanal endoscopic surgery, a recently described minimally invasive approach, provides superior exposure and access to the entirety of rectal lesions and has lower risks of compromising resection margins, lower recurrence rates and lower morbidity and mortality than do conventional transanal excision and endoscopic removals. Objectives: The aim of this study is to describe our initial experience and with minimally invasive transanal surgery (TAMIS) and its results in terms of complete resections and complications possibly related to the procedure. Materials and methods: This is a series of TAMIS cases with prospective follow-ups. We analyzed the results of 27 patients who underwent the procedure at several centers in Medellín, Colombia, between January 2012 and December 2016. Twenty patients had Single Incision Laparoscopic Surgery while the GelPOINT path transanal access platform was used for the other six patients. Laparoscope optics provide support for 16 procedures while the more recently introduced flexible endoscope supported eleven procedures. Results: Twenty-seven TAMIS procedures were performed and evaluated. Ten patients were women (37%), and 17 were men. On average, patients were followed up for 32 months, but none less than 12 months. Average patient age was 68 years (52 to 83 years). The average tumor size was 5.3 cm (2 to 9 cm) and the average distance from the anal margin was 7 cm (5 to 9 cm). Postoperative complications occurred in six cases (22%). In one case, a rectal perforation was corrected laparoscopically during the procedure. Another perforation was corrected by the same transanal route. A rectal stenosis was managed with digital dilatation, there was one case of minor rectal bleeding, one case of urinary retention and one patient developed advanced rectal cancer with a positive microscopic margin (4%) three months after resection. There were no readmissions. There were no deaths due to the intervention. Pathology reported low grade adenomas in three cases (11%), high grade adenomas in 11 cases (41%), in-situ adenocarcinoma in six cases (22%), neuroendocrine tumors in five cases (19%), and one case each of cicatricial fibrosis (4%) and leiomyoma (4%). Limitations: The results cannot be extrapolated to the general population because of the limited number of interventions and performance of procedures by only two authors. Conclusions: Our initial experience shows TAMIS to be a minimally invasive procedure with low postoperative morbidity which is curative for benign lesions and for selected patients with early cancer.

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Resumen La pancreatitis crónica es un trastorno irreversible y progresivo del páncreas caracterizado por inflamación, fibrosis y cicatrización. Las funciones exocrinas y endocrinas se pierden, lo que a menudo conduce al dolor crónico. La etiología es multifactorial, aunque el alcoholismo es el factor de riesgo más importante en los adultos. Si se sospecha pancreatitis crónica, la tomografía computarizada con contraste es la mejor modalidad de diagnóstico por imágenes. Aunque los narcóticos y los antidepresivos proporcionan el mayor alivio del dolor, más de la mitad de los pacientes eventualmente requiere una intervención por endoscopia o cirugía. La colangiopancreatografía retrógrada endoscópica es una alternativa eficaz para una variedad de terapias en el tratamiento de enfermedades benignas y malignas del páncreas. En los últimos 50 años, la endoterapia ha evolucionado hasta convertirse en la terapia de primera línea en la mayoría de las enfermedades inflamatorias agudas y crónicas del páncreas. A medida que avanza este campo, es importante que los gastroenterólogos mantengan un conocimiento adecuado de la indicación del procedimiento, mantengan el volumen de procedimiento suficiente para manejar la endoterapia pancreática compleja y comprendan enfoques alternativos a las enfermedades pancreáticas, incluidos el tratamiento médico, la terapia guiada por ecografía endoscópica, el manejo de las estenosis sintomáticas y cálculos, las intervenciones sobre el plexo celíaco y el drenaje de los pseudoquistes pancreáticos.

Abstract Chronic pancreatitis is an irreversible and progressive disorder of the pancreas characterized by inflammation, fibrosis and scarring. Exocrine and endocrine functions are lost often leading to chronic pain. Its etiology is multifactorial, although alcoholism is the most important risk factor in adults. If chronic pancreatitis is suspected, computed tomography with contrast is the best imaging modality. Although narcotics and antidepressants provide the greatest pain relief, more than half of all patients eventually require intervention by endoscopy or surgery. Endoscopic retrograde cholangiopancreatography (ERCP) is an effective alternative for a variety of therapies for treating benign and malignant diseases of the pancreas. In the last 50 years, endoscopic treatment has evolved to become the first-line therapy for most acute and chronic inflammatory diseases of the pancreas. As this field progresses, it has become important for gastroenterologists to keep their knowledge of indications for this procedure up-to-date and to perform a sufficient volume of procedures to allow them to manage complex pancreatic endoscopic therapy. Keeping up-to-date should include an understanding of alternative approaches to pancreatic diseases including medical treatment, therapy guided by endoscopic ultrasound, management of symptomatic stenoses and stones, interventions on the celiac plexus, and drainage of pancreatic pseudocysts.

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Objetivo: desarrollar una guía de práctica clínica con la evidencia más reciente para la tamización de cáncer de colon y recto en población asintomática de riesgo promedio, dirigida a pacientes, personal asistencial, administrativo y entes gubernamentales de cualquier servicio de atención en Colombia. Materiales y métodos: esta guía fue desarrollada por un equipo multidisciplinario con apoyo de la Asociación Colombiana de Gastroenterología, el Grupo Cochrane ITS y el Instituto de Investigaciones Clínicas de la Universidad Nacional de Colombia. Se desarrollaron preguntas clínicas relevantes y se realizó la búsqueda de guías nacionales e internacionales en bases de datos especializadas. Las guías existentes fueron evaluadas en términos de calidad y aplicabilidad; ninguna de ellas cumplió el criterio de adaptación, por lo que se decidió construir una guía de novo. El Grupo Cochrane realizó la búsqueda sistemática de la literatura. Las tablas de evidencia y recomendaciones fueron realizadas con base en la metodología GRADE. Las recomendaciones de la guía fueron socializadas en una reunión de expertos con entes gubernamentales y pacientes. Resultados: se desarrolló una guía de práctica clínica basada en la evidencia para la tamización del cáncer de colon y recto en Colombia. Conclusiones: la tamización de pacientes asintomáticos de riesgo promedio en Colombia en forma adecuada con estándares de calidad tiene el potencial de impactar la carga de cáncer de colon en el país.

Objective: To provide an evidence-based clinical practice guideline for the screening of colon and rectal cancer for patients, caregivers, administrative and government bodies at all levels of care in Colombia. Materials and Methods: This guide was developed by a multidisciplinary team with the support of the Colombian Association of Gastroenterology, Cochrane STI Group and Clinical Research Institute of the Universidad Nacional de Colombia. Relevant clinical questions were developed and the search for national and international guidelines in databases was performed. Existing guidelines were evaluated for quality and applicability. None of the guidelines met the criteria for adaptation, so the group decided to develop a de novo guideline. Systematic literature searches were conducted by the Cochrane Group. The tables of evidence and recommendations were made based on the GRADE methodology. The recommendations of the guide were socialized in a meeting of experts with government agencies and patients. Results: An evidence-based Clinical Practice Guidelines for the screening of colorectal cancer was developed for the Colombian context. Conclusions: The opportune detection of colon cancer would have an impact of the disease in Colombia.

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Los stents biodegradables son una opción muy atractiva para utilizar en pacientes con estenosis benignas recurrentes/recalcitrantes del tracto digestivo y biliar. En teoría, utilizando estos stents biodegradables, se pueden evitar dilataciones repetitivas de estenosis digestivas o biliares refractarias al manejo convencional, como también se podrían evitar resecciones quirúrgicas, principalmente en pacientes de alto riesgo quirúrgico, y se minimiza el número de procedimientos endoscópicos intervencionistas.

Biodegradable stents are a very attractive option for use in patients with benign but recurrent and recalcitrant digestive tract and biliary strictures. In theory, use of these biodegradable stents mitigates the need for repetitive expansion of digestive or biliary strictures which are refractory to conventional management and avoids the need of surgical resection. This is especially true for patients at high surgical risk. Stents can also minimize the number of interventional endoscopic procedures performed on a patient.

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The endoscopic dilation of the gastrointestinal tract is carried out to relieve either functional or organic disorders, secondary to a variety of both benign and malignant diseases. With the advent of new technologies, virtually all digestive stenosis can be managed in a minimally invasive way. Despite its wide dissemination in actual practice, there are few controlled studies comparing the different forms of endoscopic dilation. In this article, we review this technique and the evidence available for application in different segments of the gastrointestinal tract. The future of the dilations includes the development of dilators to assess dilation during the procedure. These advents and the implementation indications, benefits and risks for each of the existing systems of dilations.

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Objetivo: la obstrucción por cáncer colorrectal (CCR) es una entidad frecuente y con importante morbilidad y mortalidad. El uso de stent colónicos aparece como una buena alternativa y pueden utilizarse con carácter paliativo o como una terapia puente para facilitar una única y definitiva cirugía. El objetivo del presente estudio es comparar el uso de los stents con la cirugía en los pacientes con obstrucción maligna colorrectal en términos de necesidad de ostomías, morbimortalidad y sobrevida. Métodos: se realizó un estudio descriptivo donde se analizaron retrospectivamente los datos recogidos de una cohorte de 103 pacientes, desde 2004 al 2012, registrada en una base de datos para tal fin y dividida en 4 grupos: un grupo al que se le colocó stent colónico y luego se llevó a cirugía electiva (SCX, n = 26), otro grupo llevado a cirugía convencional (CXC, n = 30), y los otros dos grupos con pacientes en fase avanzada de la enfermedad, unos en quienes solo se les colocó stent paliativo (SP, n = 24) y otros llevados a cirugía con intención paliativa (CP, n = 23). Se establecieron comparaciones entre los grupos y se realizó una descripción de los hallazgos más relevantes. Resultados: se registró un éxito técnico en 90,0% y éxito clínico en 82,0% en los grupos con stents. Se presentaron dos perforaciones asociadas con el stent (8,3%) en el grupo SP y ninguna en el grupo SCX. Hubo migración del stent en 3 pacientes (11,5%) del grupo SCX y en 3 (12,5%) del grupo SP. Se encontró una sobrevida global del 42,7%, siendo más baja en los grupos SP y CP con 4,2% y 34,8%, respectivamente. Se presentó una menor necesidad de ostomías en el grupo SCX con 5 pacientes (19,2%) versus 8 (26,7%) del grupo CXC, sin relevancia estadística, la cual sí se observó al comparar la necesidad de ostomías entre los grupos de CXC y CP con 8 (26,7%) y 15 (65,2%) pacientes respectivamente (P<0,05). Hubo alivio en el grupo SCX en 22 pacientes (84,6%) y solo en 18 del grupo CXC (60%), con una diferencia estadísticamente significativa (p = 0,042). La estancia hospitalaria fue menor en los grupos manejados con stent (SCX y SP), con promedio de 4 días (0-9 días) para cada uno. En el grupo CXC, 30 pacientes requirieron al menos una reintervención, 9 (39,1%) del grupo CP y 8 en el grupo de los stents. Conclusión: el uso de los stents colorrectales con intención paliativa o como terapia puente preoperatoria tiene baja morbilidad y evita en ocasiones una colostomía temporal o definitiva; también previene cirugías en pacientes con enfermedad avanzada y minimiza las ostomías en comparación con los pacientes operados paliativamente; además de que tienen menor estancia hospitalaria. Sin embargo, se necesitan estudios prospectivos que aclaren cuál es el verdadero papel de los stents en la patología obstructiva colorrectal maligna.

Objective: Obstructions due to colorectal cancer (CRC) are common and carry significant risks of morbidity and mortality. The use of colonic stents appears to be a good alternative and can be used with palliative therapy or as a bridge to facilitate definitive one-time-only surgery. The aim of this study is to compare the use of stents with surgery in patients with malignant colorectal obstructions in terms of morbidity, survival and the need for ostomies. Methods: This is a descriptive study based on data collected from a cohort of 103 patients from 2004 to 2012. Data were recorded in a database designed for this purpose. Patients were retrospectively divided into four groups for purposes of analysis. One group, which was labelled SCX, had had colonic stents placed and later underwent elective surgery (n = 26). A second group labelled CXC had undergone conventional surgery (n = 30). The other two groups consisted of patients in advanced stages of the disease. One of these groups, labelled SP received palliative stents (n = 24). The final group, labelled CP, underwent palliative surgery (n = 23). Comparisons among groups were made and then descriptions of the most important findings were developed. Results: The technical success rate was 90.0% and the clinical success rate was 82.0% in the groups of patients who received stents. There were two perforations in the SP group (8.3%) and none in the other group (SP) which received stents. Stent migration occurred in three patients (11.5%) in the SCX group and three (12.5%) in the SP group. The overall survival rate was 42.7%, but was only 4.2% in the SP group and 34.8% in the CP group. Fewer ostomies were required in the SCX group (five patients, 19.2%) than in the CXC group (eight patients, 26.7%) although the difference was not statistically significant. Similarly eight patients (26.7%) in the CXC group and 15 patients (65.2%) in the CP group required ostomies (P <0.05). Obstructions were ...

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Los pacientes con hepatopatías avanzadas pueden presentar estados de hipervolemia que los puede llevar a desarrollar hiponatremia dilucional, la cual se origina principalmente a niveles persistentemente aumentados de hormona antidiurética. El trasplante hepático es la terapia de elección en pacientes con hepatopatías terminales con excelentes sobrevidas en el tiempo. La hiponatremia dilucional ha demostrado ser un factor pronóstico en pacientes con cirrosis e incluso de mortalidad en pacientes en lista de espera para trasplante de hígado. Por tal razón, actualmente hace parte de los puntajes de clasificación de lista de espera de trasplante hepático en pacientes con hepatopatías avanzadas. El papel de la hiponatremia pretrasplante en el pronóstico de pacientes que serán llevados a trasplante hepático es tema de renovado interés, con datos en la literatura bastante contradictorios. Hasta hace poco, solo la restricción hídrica era el tratamiento contra la hiponatremia dilucional; sin embargo, actualmente se dispone de tratamientos dirigidos contra la hiponatremia dilucional en pacientes con cirrosis con resultados algo alentadores, aunque poco se sabe sobre su efecto en pacientes con cirrosis que serán llevados a trasplante hepático.

Patients with advanced liver disease may present volume overloads that can lead to the development of dilutional hyponatremia primarily as the result of persistently high levels of antidiuretic hormone. Liver transplantation is the therapy of choice for patients with terminal liver disease. Patient survival time following transplantation is excellent. Dilutional hyponatremia has proven to be a prognostic factor for patients with cirrhosis, and it can even lead to mortality in patients on the waiting list for liver transplantation. Consequently, it is currently part of the scoring system for classifying patients with advanced liver disease who are on the waiting list for liver transplantation. The role of pretransplant hyponatremia in the prognoses of patients scheduled for liver transplantation is the subject of renewed interest, but the data in the literature is rather contradictory. Until recently, the only treatment for dilutional hyponatremia was the restriction of water intake, but now new and encouraging treatments are available that are directed against dilutional hyponatremia in patients with cirrhosis. Nevertheless, little is known about their effects in patients with cirrhosis who are about to undergo liver transplantation.

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