Exactitud diagnóstica en el cáncer de esófago localizado. Estudio observacional retrospectivo.

OBJECTIVE: To assess the accuracy of the diagnostic tests for a correct clinical tumor staging in localized esophageal cancer (EC). METHOD: Retrospective observational study of patients who underwent esophagectomy for cancer in a referral hospital between January 2003 and September 2019. Those patients who received neoadjuvant treatment were excluded in order to avoid bias from downstaging effects. The preoperative stage was compared with the pathological stage of the surgical specimen. Computed tomography (CT) , endoscopic ultrasound (EUS) and positron emission tomography (PET) were evaluated. The pT stage was correlated with the tumor length described in the esophagram (EG). RESULTS: Among the 63 patients included, the clinical staging was correct in 16 (global accuracy 25.4%), it was overstaged in 21 (33.2%) and understaged in 26 (41.3%). For cT staging, the accuracy of EUS was higher than that of CT (46.6% and 34.9%, respectively), specially for early stages. EG tumor length correlated with pT stage (p < 0.05). For cN staging, PET had the highest sensitivity (50.0%) and negative predictive value (75.0%). CONCLUSIONS: Despite the multiple diagnostic tools used, the global accuracy of clinical staging in localized EC is still a challenge. The lack of a test that stands out significantly from the others reinforces the need to use them in a complementary way.

OBJETIVO: Evaluar la exactitud diagnóstica para el estadiaje clínico del cáncer de esófago (CE) localizado. MÉTODO: Estudio observacional retrospectivo de los pacientes esofagectomizados por CE en un hospital de referencia entre enero de 2003 y septiembre de 2019. Se excluyeron aquellos que recibieron neoadyuvancia para evitar sesgos de infraestadiaje. Se comparó el estadio preoperatorio con el estadio patológico de la pieza quirúrgica. Se evaluaron la tomografía computarizada (TC), la ecoendoscopia (EUS) y la tomografía por emisión de positrones (PET). El estadio pT se correlacionó con la longitud tumoral descrita en el esofagograma (EG). RESULTADOS: De los 63 pacientes incluidos, el estadiaje clínico fue correcto en 16 (exactitud 25.4%), con sobreestadiaje en 21 (33.2%) e infraestadiaje en 26 (41.3%). Para el estadiaje cT, la EUS fue superior a la TC (exactitud 46.6% y 34.9%, respectivamente), en especial para estadios precoces. La longitud tumoral del EG se correlacionó con el estadio pT (p < 0.05). Para el estadiaje cN, la PET tuvo la mayor sensibilidad (50.0%) y el mayor valor predictivo negativo (75.0%). CONCLUSIONES: A pesar de las múltiples herramientas diagnósticas empleadas, la exactitud diagnóstica en el CE localizado es limitada. La ausencia de una prueba que destaque de manera significativa refuerza la necesidad de emplearlas de forma complementaria.

Estadiaje ganglionar en el adenocarcinoma gástrico / Lymph node stage in gastric adenocarcinoma

Resumen Objetivos: El sistema linfático del estómago es complejo y multidireccional, siendo difícil predecir el patrón de diseminación linfática en el adenocarcinoma (ADC) gástrico. Los objetivos de este trabajo son determinar si el analizar los grupos ganglionares de la pieza quirúrgica por separado tiene implicaciones en el estadiaje, además estudiar la afectación de diferentes grupos ganglionares. Materials y Método: Estudio observacional retrospectivo de pacientes intervenidos de gastrectomía y linfadenectomía con intención curativa por ADC en un hospital de referencia (2017-2021).,_Se han comparado aquellos pacientes cuya pieza quirúrgica se estudió en su totalidad (grupo A) con aquellos en los que se separaron los grupos ganglionares para su análisis (grupo B). En el grupo B, se ha analizado la afectación ganglionar de diferentes grupos ganglionares en base a la localización tumoral y el estadio pT. Resultados: Se incluyeron 150 pacientes. La media de ganglios analizados fue significativamente mayor cuando se separaron los grupos ganglionares (grupo B) (24,01 respecto a 20,49). La afectación ganglionar fue del 45,8%, 58,3% y 55,5% en los tumores de tercio superior, medio e inferior respectivamente, y los grupos difirieron en base a la localización tumoral. El riesgo de afectación ganglionar fue significativamente mayor y hubo más grupos ganglionares perigástricos afectos cuanto mayor era el estadio pT. Conclusiones: Separar los grupos ganglionares previo a su análisis aumenta el número de ganglios analizados mejorando el estadiaje ganglionar. Existen diferentes rutas de drenaje linfático dependiendo de la localización tumoral y la afectación ganglionar aumenta de forma paralela al estadio pT.

Objectives: The lymphatic system of the stomach is complex and multidirectional, making it difficult to predict the pattern of lymphatic spread in gastric adenocarcinoma (GAC). The aim of this paper is to determine if analyzing the lymph node groups of the surgical specimen separately has implications in the pathological staging, as well as to study the involvement rate of different lymph node groups. Material and Method: Retrospective observational study of patients who underwent curative intent gastrectomy and lymphadenectomy for GAC in a reference hospital (2017-2021). Those patients whose surgical specimen was studied as a whole (group A) were compared with those in whom the lymph node groups were separated by surgeons before analysis (group B). In group B, the involvement of different lymph node groups was analyzed based on tumor location and pT stage. Results: 150 patients were included. The mean number of lymph nodes analyzed was significantly higher when the lymph node groups were separately analyzed (group B) (24.01 compared to 20.49). Lymph node involvement was 45.8%, 58.3%, and 55.5% in tumors of the upper, middle, and lower third, respectively, and the involved groups differed depending on the tumor location. The higher the pT stage was, the risk of lymph node involvement was significantly higher and there were more perigastric lymph node groups affected. Conclusions: Separating lymph node groups prior to their analysis increases the number of lymph nodes analyzed and therefore improves lymph node staging. There are different lymphatic drainage routes depending on the tumor location and lymph node involvement increases in parallel with the pT stage.

Incidencia y factores de riesgo para el desarrollo de colelitiasis tras cirugía bariátrica / Incidence and risk factors for de novo cholelithiasis after bariatric surgery

Introducción: La obesidad y la rápida pérdida de peso tras la cirugía bariátrica (CB) son factores de riesgo para la formación de colelitiasis. El objetivo de este trabajo es conocer la incidencia de colelitiasis de novo sintomática (CLNS) tras CB y analizar los factores de riesgo para su desarrollo. Métodos: Estudio observacional retrospectivo unicéntrico de los pacientes sometidos a CB entre enero de 2010 y diciembre de 2017. Se ha estudiado la incidencia de CLNS y se han analizado el género, la edad, las comorbilidades, la técnica quirúrgica, el IMC inicial y el porcentaje de exceso de IMC perdido (%EIMCP) al 6.°, 12.° y 24.° mes postoperatorio. Resultados: De los 415 pacientes intervenidos de CB, 280 han sido estudiados ya que no estaban colecistectomizados previamente y tenían una ecografía preoperatoria negativa para colelitiasis. Veintinueve desarrollaron CLNS (10,35%), con un aumento en la incidencia acumulada notablemente más alto durante el primer año postoperatorio (5%, IC 95% 2,4-7,6). Un mayor porcentaje de exceso de IMC perdido al 6.°, 12.° y 24.° mes postoperatorio se correlacionó de forma estadísticamente significativa con un mayor riesgo de CLNS. Conclusiones: La incidencia de CLNS y colecistectomía tras CB es relativamente alta, principalmente durante el periodo de pérdida de peso rápida, y más cuanto mayor sea el porcentaje de exceso de IMC perdido. La colecistectomía concomitante en caso de colelitiasis preoperatoria, independientemente de la sintomatología y el uso de ácido ursodesoxicólico durante el periodo de mayor riesgo para el desarrollo de CLNS, son dos opciones terapéuticas a tener en cuenta. (AU)

Introduction: Obesity and rapid weight loss after bariatric surgery (BS) are risk factors for the development of cholelitiasis. The aim of this study is to know the incidence of the de novo symptomatic cholelitiasis (DNSC) after BS and to analyze the risk factors for its development. Methods: Single-centre retrospective observational study of patients undergoing BS between January 2010 and December 2017. The incidence of DNSC has been studied and sex, age, comorbilities, surgical tecnique, initial BMI and percentage of excess BMI lost (%EIMCP) at 6th, 12th and 24th postoperative months have been analyzed. Results: Among the 415 patients who underwent BS, 280 have been studied since they were not previously cholecystectomized and had a preoperative negative abdominal ultrasound. Twenty-nine developed DNSC (10.35%), with a remarkably higher increase in cumulative incidence during the first postoperative year (5%, 95% CI 2,4-7,6). A higher percentage of excess BMI lost at the 6, 12 and 24 postoperative months was statistically significantly correlated with an increased risk of DNSC. Conclusions: Incidence of DNSC and cholecystectomy after BS are relatively high, mainly during rapid weight loss period and even more the higher the percentage of excess BMI lost is. Concomitant cholecystectomy during BS in case of preoperative cholelithiasis regardless of symptoms and the use of ursodeoxycholic acid during the period of greater risk for DNSC development are two therapeutic options to consider. (AU)

Incidence and risk factors for de novo cholelithiasis after bariatric surgery.

INTRODUCTION: Obesity and rapid weight loss after bariatric surgery (BS) are risk factors for the development of cholelitiasis. The aim of this study is to know the incidence of the de novo symptomatic cholelitiasis (DNSC) after BS and to analyze the risk factors for its development. METHODS: Single-centre retrospective observational study of patients undergoing BS between January 2010 and December 2017. The incidence of DNSC has been studied and sex, age, comorbilities, surgical tecnique, initial BMI and percentage of excess BMI lost (%EBMIL) at 6th, 12th and 24th postoperative months have been analyzed. RESULTS: Among the 415 patients who underwent BS, 280 have been studied since they were not previously cholecystectomized and had a preoperative negative abdominal ultrasound. Twenty-nine developed DNSC (10,35%), with a remarkably higher increase in cumulative incidence during the first postoperative year (CI 5%, IC 95% 2,4-7,6). A higher percentage of excess BMI lost at the 6, 12 and 24 postoperative months was statistically significantly correlated with an increased risk of DNSC. CONCLUSIONS: Incidence of DNSC and cholecystectomy after BS are relatively high, mainly during rapid weight loss period and even more the higher the percentage of excess BMI lost is. Concomitant cholecystectomy during BS in case of preoperative cholelithiasis regardless of symptoms and the use of ursodeoxycholic acid during the period of greater risk for DNSC development are two therapeutic options to consider.

La hernia ureteroinguinal: una condición infrecuente a tener en cuenta / The ureteroinguinal hernia: An infrequent condition to keep in mind

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Incidence and risk factors for de novo cholelithiasis after bariatric surgery. / Incidencia y factores de riesgo para el desarrollo de colelitiasis tras cirugía bariátrica.

INTRODUCTION: Obesity and rapid weight loss after bariatric surgery (BS) are risk factors for the development of cholelitiasis. The aim of this study is to know the incidence of the de novo symptomatic cholelitiasis (DNSC) after BS and to analyze the risk factors for its development. METHODS: Single-centre retrospective observational study of patients undergoing BS between January 2010 and December 2017. The incidence of DNSC has been studied and sex, age, comorbilities, surgical tecnique, initial BMI and percentage of excess BMI lost (%EIMCP) at 6th, 12th and 24th postoperative months have been analyzed. RESULTS: Among the 415 patients who underwent BS, 280 have been studied since they were not previously cholecystectomized and had a preoperative negative abdominal ultrasound. Twenty-nine developed DNSC (10.35%), with a remarkably higher increase in cumulative incidence during the first postoperative year (5%, 95% CI 2,4-7,6). A higher percentage of excess BMI lost at the 6, 12 and 24 postoperative months was statistically significantly correlated with an increased risk of DNSC. CONCLUSIONS: Incidence of DNSC and cholecystectomy after BS are relatively high, mainly during rapid weight loss period and even more the higher the percentage of excess BMI lost is. Concomitant cholecystectomy during BS in case of preoperative cholelithiasis regardless of symptoms and the use of ursodeoxycholic acid during the period of greater risk for DNSC development are two therapeutic options to consider.