Malformación linfática quística gigante del hígado: dos casos pediátricos con diferente abordaje quirúrgico / Giant cystic lymphatic malformation of the liver: two pediatric cases with different surgical approach

Introducción. Las malformaciones linfáticas quísticas, también llamadas linfangiomas quísticos, aparecen muy raramente de forma aislada en el hígado. Casos clínicos. Se presentan dos pacientes femeninas de edad preescolar con marcada hepatomegalia, dependiente de lesiones quísticas multitabicadas, secundarias a malformación linfática quística gigante del hígado, que fueron tratadas en el Hospital Pediátrico Universitario William Soler, La Habana, Cuba. Resultados. En ambos casos el diagnóstico se apoyó en los estudios de imágenes, la laparoscopia y el análisis histopatológico. En un caso el tratamiento fue la hepatectomía derecha, mientras que en el otro se empleó la escleroterapia, ambas con evolución favorable. Conclusión. A pesar de su rareza, este diagnóstico no debe obviarse ante un paciente pediátrico con lesiones hepáticas quísticas. El tratamiento de elección es la resección quirúrgica, pero su indicación y envergadura debe valorarse de forma individualizada

Introduction. Cystic lymphatic malformations, also called cystic lymphangiomas, are very rarely found in the liver. Clinical cases. Two pediatric female preschool-age patients. presented with hepatomegaly due to multi-septated cystic lesions of the liver, who received treatment at Hospital Pediátrico Universitario William Soler, La Habana, Cuba. Results. We report two pediatric cases with giant cystic lymphatic malformation of the liver. In both cases, the diagnosis were based on imaging, laparoscopy and pathology. In one case the treatment was right hepatectomy, whereas in the other, sclerotherapy was performed, both with a favorable outcome. Conclusion. Despite its rarity, this diagnosis should be considered in pediatric patients with hepatic cystic lesions. The recommended treatment is surgical resection, but its indication and extent should be assessed individually for each patient.

Resecabilidad de las metástasis hepáticas según la lateralidad del tumor colorrectal primario y la temporalidad de presentación. Serie de casos en dos instituciones de alta complejidad de la ciudad de Medellín / Resectability of liver metastasis according to the laterality of the primary colorectal tumor and the temporality of presentation. Case series in two high-complex institutions in the city of Medellín

Introducción. La neoplasia colorrectal es una patología oncológica muy frecuente a nivel mundial y una de las causas más comunes de mortalidad por cáncer. La epidemiologia, diagnóstico y tratamiento han sido ampliamente estudiadas, mientras que los datos sobre la enfermedad metastásica siguen siendo escasos. El hígado es el órgano más comúnmente afectado y algunos estudios sugieren diferencias en sobrevida y resecabilidad según la localización del tumor primario. El objetivo de este estudio fue establecer el comportamiento y resecabilidad de neoplasias avanzadas colorrectales en dos hospitales de la ciudad de Medellín, Colombia. Métodos. Estudio analítico retrospectivo para identificar los patrones de las metástasis hepáticas y sus características en función de las diferencias clínicas, histológicas y endoscópicas del tumor colorrectal primario entre 2015 y 2020. Resultados. Se recolectaron 54 pacientes con neoplasia colorrectal y metástasis hepáticas, 21 (39 %) derechas y 33 (61 %) izquierdas. El número de metástasis promedio fue de 3,1 en tumores del lado derecho y de 2,4 del izquierdo y el tamaño promedio de cada lesión fue de 4,9 y 4,2 cm, respectivamente. La tasa de resecabilidad fue del 42 % en los tumores derechos y del 82 % en los izquierdos. Las lesiones metacrónicas presentaron una tasa de resecabilidad del 90 % y las sincrónicas del 61 %. Conclusión. En este estudio, las lesiones originadas en neoplasias primarias del colon izquierdo y las lesiones metacrónicas fueron factores pronósticos favorables para la resecabilidad, un factor que impacta en la sobrevida y el tiempo libre de enfermedad de estos pacientes.

Introduction. Colorectal tumor is the most frequent pathology worldwide and one of the most common causes of mortality attributed to cancer. Epidemiology, diagnosis and treatment have been extensively studied, while information on metastatic disease remains scarce, despite being the main cause of death. Some studies suggest differences in terms of survival and resectability according to the anatomical location of the primary tumor. The aim is to establish the behavior and resectability of advanced cancers in two high-complex hospitals in the city of Medellín, Colombia. Methods. Cross-sectional observational study from secondary sources of information based on a retrospective cohort, using available data from adult patients with colorectal cancer and liver metastases between 2015 and 2020. Results. Fifty-four patients with colorectal neoplasms and liver metastases were collected, of which 21 (39%) were on the right side. The average number of liver metastases was 3.1 on the right side and 2.4 on the left, and the average size of each metastatic lesion was 4.9 cm and 4.2 cm, respectively. The resectability rate was 42% in the right tumors and 82% in the left ones. Metachronous lesions had a resectability rate of 90% and synchronous ones 61%. Conclusion. The complete resectability of liver metastatic lesions is the only therapeutic alternative with impact, in terms of survival and disease-free time in these patients. The favorable prognostic factors for the resectability of these lesions in our study were those originating from left primary tumors and metachronous lesions, where less liver tumor involvement was evidenced

Neoplasia quística mucinosa en la vía biliar intrahepática. Presentación de dos casos / Mucinous cystic neoplasm in the intrahepatic bile duct. Presentation of two cases

Introducción. Las neoplasias quísticas mucinosas del hígado son tumores poco frecuentes, equivalen a menos del 5 % de todas las lesiones quísticas hepáticas y se originan generalmente en la vía biliar intrahepática, con poco compromiso extrahepático. En la mayoría de los casos su diagnóstico es incidental dado que es una entidad generalmente asintomática con un curso benigno; sin embargo, hasta en el 30 % pueden ser malignas. En todos los casos se debe hacer una resección quirúrgica completa de la lesión. Caso clínico. Se presentan dos pacientes con diagnóstico de neoplasia quística mucinosa en la vía biliar intrahepática, así como sus manifestaciones clínicas, hallazgos imagenológicos y tratamiento. Discusión. Debido a su baja incidencia, esta patología constituye un reto diagnóstico, que se puede confundir con otro tipo de entidades más comunes. El diagnóstico definitivo se hace de forma histopatológica, pero en todos los casos, ante la sospecha clínica, se recomienda la resección completa. Conclusión. Se presentan dos pacientes con diagnóstico de neoplasias quísticas mucinosas del hígado, una entidad poco frecuente y de difícil diagnóstico

Introduction. Mucinous cystic neoplasms of the liver are rare tumors, accounting for less than 5% of all liver cystic lesions, and generally originate from the intrahepatic bile duct with little extrahepatic involvement. In most cases its diagnosis is incidental since it is a generally asymptomatic entity with a benign course; however, up to 30% can have a malignant course. In all cases, complete surgical resection of the lesion must be performed. Clinical case. Two patients with a diagnosis of mucinous cystic neoplasm in the intrahepatic bile duct are presented, as well as their clinical manifestations, imaging findings, and treatment. Discussion. Due to its low incidence, this pathology constitutes a diagnostic challenge, which can be confused with other types of more common entities. The definitive diagnosis is made histopathologically, but in all cases, given clinical suspicion, complete resection is recommended. Conclusion. Two patients with a diagnosis of mucinous cystic neoplasms of the liver are presented, a rare entity that is difficult to diagnose

Cambios fisiopatológicos y complicaciones de las resecciones hepáticas / Physiopathological changes and complications of liver resections / Alterações fisiopatológicas e complicações das ressecções hepáticas

Las modernas técnicas quirúrgicas y anestésicas han permitido ampliar el número de intervenciones quirúrgicas a nivel hepático por diversas patologías. Logrando disminuir su moralidad pero manteniendo al día de hoy elevados niveles de morbilidad. Durante la cirugía hepática se producen cambios hemodinámicos vinculados a la movilización del hígado, a los clampeos y a las pérdidas sanguíneas independientemente de la vía de abordaje. En el postoperatorio las complicaciones o cambios fisiopatológicos derivan de las lesiones producidas por los fenómenos de isquemia y reperfusión; y aquellas producidas por la regeneración hepática. Dicha capacidad depende no solo de la cantidad de hígado remanente sino también de la posible hepatopatía preexistente. La insuficiencia hepática postoperatoria es la complicación más temida y se manifiesta con ictericia, ascitis, encefalopatía y alteraciones en la paraclínica como la hiperbilirrubinemia y descenso del tiempo de protrombina. Las complicaciones quirúrgicas dependen del procedimiento realizado y se dividen principalmente en biliares y vasculares. Las secuelas de las hepatectomías dependen de factores como el estado general del paciente, la presencia hepatopatía, el acto quirúrgico y la cantidad y calidad del hígado remanente.

Modern surgical and anesthetic techniques have made it possible to increase the number of liver surgeries for various pathologies. This has reduced morbidity but still maintains high levels of morbidity. During hepatic surgery, hemodynamic changes related to liver mobilization, clamping and blood loss occur independently of the approach route. In the postoperative period, complications or pathophysiological changes derive from the lesions produced by ischemia and reperfusion phenomena; and those produced by hepatic regeneration. This capacity depends not only on the amount of remaining liver but also on the possible pre-existing hepatopathy. Postoperative liver failure is the most feared complication and manifests with jaundice, ascites, encephalopathy and paraclinical alterations such as hyperbilirubinemia and decreased prothrombin time. Surgical complications depend on the procedure performed and are mainly divided into biliary and vascular. The sequelae of hepatectomies depend on factors such as the patient's general condition, the presence of liver disease, the surgical procedure and the quantity and quality of the remaining liver.

As modernas técnicas cirúrgicas e anestésicas tornaram possível aumentar o número de cirurgias hepáticas para várias patologias. Isto levou a uma diminuição da morbidade, mas ainda mantém altos níveis de morbidade. Durante a cirurgia hepática, ocorrem alterações hemodinâmicas ligadas à mobilização hepática, pinçamento e perda de sangue, independentemente da via de aproximação. No período pós-operatório, complicações ou alterações fisiopatológicas derivam de lesões causadas por fenômenos de isquemia e reperfusão, e aquelas causadas pela regeneração hepática. Esta capacidade depende não apenas da quantidade de fígado restante, mas também de uma possível doença hepática pré-existente. A insuficiência hepática pós-operatória é a complicação mais temida e se manifesta com icterícia, ascite, encefalopatia e alterações paraclínicas, tais como hiperbilirrubinemia e diminuição do tempo de protrombina. As complicações cirúrgicas dependem do procedimento realizado e são divididas principalmente em biliares e vasculares. As seqüelas de hepatectomias dependem de fatores como o estado geral do paciente, a presença de doença hepática, o procedimento cirúrgico e a quantidade e qualidade do fígado restante.

Textbook outcome in gallbladder carcinoma after curative-intent resection: a 10-year retrospective single-center study / 中华医学杂志(英文版)

BACKGROUND@#Textbook outcome (TO) can guide decision-making among patients and clinicians during preoperative patient selection and postoperative quality improvement. We explored the factors associated with achieving a TO for gallbladder carcinoma (GBC) after curative-intent resection and analyzed the effect of adjuvant chemotherapy (ACT) on TO and non-TO patients.@*METHODS@#A total of 540 patients who underwent curative-intent resection for GBC at the Department of Hepatobiliary Surgery of the First Affiliated Hospital of Xi'an Jiaotong University from January 2011 to December 2020 were retrospectively analyzed. Multivariable logistic regression was used to investigate the factors associated with TO.@*RESULTS@#Among 540 patients with GBC who underwent curative-intent resection, 223 patients (41.3%) achieved a TO. The incidence of TO ranged from 19.0% to 51.0% across the study period, with a slightly increasing trend over the study period. The multivariate analysis showed that non-TO was an independent risk factor for prognosis among GBC patients after resection ( P = 0.003). Age ≤60 years ( P = 0.016), total bilirubin (TBIL) level ≤34.1 μmol/L ( P <0.001), well-differentiated tumor ( P = 0.008), no liver involvement ( P <0.001), and T1-2 stage disease ( P = 0.006) were independently associated with achieving a TO for GBC after resection. Before and after propensity score matching (PSM), the overall survival outcomes of non-TO GBC patients who received ACT and those who did not were statistically significant; ACT improved the prognosis of patients in the non-TO group ( P <0.05).@*CONCLUSION@#Achieving a TO is associated with a better long-term prognosis among GBC patients after curative-intent resection, and ACT can improve the prognosis of those with non-TO.

Effect of inferior vena cava respiratory variability-guided fluid therapy after laparoscopic hepatectomy: a randomized controlled clinical trial / 中华医学杂志(英文版)

BACKGROUND@#After major liver resection, the volume status of patients is still undetermined. However, few concerns have been raised about postoperative fluid management. We aimed to compare gut function recovery and short-term prognosis of the patients after laparoscopic liver resection (LLR) with or without inferior vena cava (IVC) respiratory variability-directed fluid therapy in the anesthesia intensive care unit (AICU).@*METHODS@#This randomized controlled clinical trial enrolled 70 patients undergoing LLR. The IVC respiratory variability was used to optimize fluid management of the intervention group in AICU, while the standard practice of fluid management was used for the control group. The primary outcome was the time to flatus after surgery. The secondary outcomes included other indicators of gut function recovery after surgery, postoperative length of hospital stay (LOS), liver and kidney function, the severity of oxidative stress, and the incidence of severe complications associated with hepatectomy.@*RESULTS@#Compared with patients receiving standard fluid management, patients in the intervention group had a shorter time to anal exhaust after surgery (1.5 ± 0.6 days vs. 2.0 ± 0.8 days) and lower C-reactive protein activity (21.4 [95% confidence interval (CI): 11.9-36.7] mg/L vs. 44.8 [95%CI: 26.9-63.1] mg/L) 24 h after surgery. There were no significant differences in the time to defecation, serum concentrations of D -lactic acid, malondialdehyde, renal function, and frequency of severe postoperative complications as well as the LOS between the groups.@*CONCLUSION@#Postoperative IVC respiratory variability-directed fluid therapy in AICU was facilitated in bowel movement but elicited a negligible beneficial effect on the short-term prognosis of patients undergoing LLR.@*TRIAL REGISTRATION@#ChiCTR-INR-17013093.

Glutamine synthetase-negative hepatocellular carcinoma has better prognosis and response to sorafenib treatment after hepatectomy / 中华医学杂志(英文版)

BACKGROUND@#Glutamine synthetase (GS) and arginase 1 (Arg1) are widely used pathological markers that discriminate hepatocellular carcinoma (HCC) from intrahepatic cholangiocarcinoma; however, their clinical significance in HCC remains unclear.@*METHODS@#We retrospectively analyzed 431 HCC patients: 251 received hepatectomy alone, and the other 180 received sorafenib as adjuvant treatment after hepatectomy. Expression of GS and Arg1 in tumor specimens was evaluated using immunostaining. mRNA sequencing and immunostaining to detect progenitor markers (cytokeratin 19 [CK19] and epithelial cell adhesion molecule [EpCAM]) and mutant TP53 were also conducted.@*RESULTS@#Up to 72.4% (312/431) of HCC tumors were GS positive (GS+). Of the patients receiving hepatectomy alone, GS negative (GS-) patients had significantly better overall survival (OS) and recurrence-free survival (RFS) than GS+ patients; negative expression of Arg1, which is exclusively expressed in GS- hepatocytes in the healthy liver, had a negative effect on prognosis. Of the patients with a high risk of recurrence who received additional sorafenib treatment, GS- patients tended to have better RFS than GS+ patients, regardless of the expression status of Arg1. GS+ HCC tumors exhibit many features of the established proliferation molecular stratification subtype, including poor differentiation, high alpha-fetoprotein levels, increased progenitor tumor cells, TP53 mutation, and upregulation of multiple tumor-related signaling pathways.@*CONCLUSIONS@#GS- HCC patients have a better prognosis and are more likely to benefit from sorafenib treatment after hepatectomy. Immunostaining of GS may provide a simple and applicable approach for HCC molecular stratification to predict prognosis and guide targeted therapy.

Hemangioma hepático gigante único: serie de casos con seguimiento de pacientes tratados quirúrgicamente / Single giant liver hemangioma: case series with follow-up of patients treated surgically

El tratamiento del hemangioma hepático gigante (HHG), sigue siendo motivo de controversia. El objetivo de este estudio fue reportar los resultados de pacientes con HHG resecados quirúrgicamente en términos de morbilidad postoperatoria (MPO). Serie de casos con seguimiento. Se incluyeron pacientes con HHG, sometidos a cirugía de forma consecutiva, en Clínica RedSalud Mayor, entre 2011 y 2020. La variable resultado fue MPO. Otras variables de interés fueron: tiempo quirúrgico, estancia hospitalaria y mortalidad. Las pacientes fueron seguidas de forma clínica. Se utilizó estadística descriptiva, con medidas de tendencia central y dispersión. Se intervinieron 5 pacientes, con una mediana de edad de 38 años. La medianas del tiempo quirúrgico y estancia hospitalaria; fueron 75 min y 4 días respectivamente. La MPO fue 20 % (1 caso de seroma). Con una mediana de seguimiento de 41 meses, los pacientes se encuentran asintomáticos y no se ha verificado morbilidad alejada. La resección quirúrgica de un HHG se puede realizar con escasa morbilidad, tanto en términos numéricos como de gravedad de la complicación observada.

SUMMARY: Treatment of giant hepatic hemangioma (GHH) remains controversial. The aim of this study was to report the outcomes of surgically resected GHH patients in terms of postoperative morbidity (POM). Case series with follow-up. Patients with GHH who underwent surgery consecutively at the RedSalud Mayor Clinic between 2011 and 2020 were included. The outcome variable was POM. Other variables of interest were surgical time, hospital stay and mortality. The patients were followed up clinically. Descriptive statistics were used, with measures of central tendency and dispersion. Five patients underwent surgery, with a median age of 38 years. The median surgical time and hospital stay; were 75 min and 4 days respectively. The MPO was 20 % (1 case of seroma). With a median follow-up of 41 months, the patients are asymptomatic, and no distant morbidity has been verified. Surgical resection of GHH can be performed with low morbidity, both in terms of numbers and the severity of the complication observed.

Pseudotumor inflamatorio hepático, una entidad de difícil diagnóstico / Inflammatory pseudotumor of the liver: a condition hard to diagnose

RESUMEN El pseudotumor inflamatorio hepático es una lesión muy infrecuente, sin una etiología ni patogenia claras. Su diagnóstico preoperatorio no es habitual pero, en caso de realizarse, puede evitar la cirugía. Presentamos el caso de un paciente joven, con antecedente de lupus cutáneo que, tras debutar con una pancreatitis aguda, presenta episodios de colangitis y cuyos hallazgos radiológicos no permiten descartar la presencia de un colangiocarcinoma, por lo que se realiza hepatectomía izquierda, siendo el diagnóstico histológico final de pseudotumor inflamatorio hepático.

ABSTRACT Inflammatory pseudotumors of the liver are rare and lack clear etiology and pathogenesis. The preoperative diagnosis is seldom made but it avoids unnecessary surgery. We report the case of a young male patient with a history of cutaneous lupus and episodes cholangitis after an acute pancreatitis. As the imaging tests could not rule out cholangiocarcinoma, a left liver resection was performed, and the final histologic diagnosis was inflammatory pseudotumor of the liver.

Aplicación de modelos 3D en cirugía hepática / Implementation of three-dimensional printed models in hepatic surgery

RESUMEN La impresión de modelos tridimensionales (M3D) implica obtener una estructura sólida y formada a partir de un modelo digital. Para la reconstrucción 3D se utilizó tomografía computarizada contrastada, realizándose impresión de modelos sobre la base de las principales estructuras anatómicas hepáticas. Se utilizaron M3D en dos pacientes con indicación quirúrgica, una mujer con trombocitopenia familiar y metástasis hepática de adenocarcinoma rectal, sin respuesta a quimioterapia, y un hombre con hepatopatía infecciosa crónica y diagnóstico de carcinoma hepatocelular. La aplicación de M3D resultó de gran utilidad, pues permitió un mejor entendimiento de la relación espacial de las estructuras anatómicas en ambos casos. En nuestra experiencia, la aplicación de M3D fue muy útil para planificar la cirugía y dar una aproximación más certera de los reparos anatómicos. El modelo se obtuvo en 7 días y costó 380 dólares, un valor elevado para nuestro medio.

ABSTRACT Three-dimensional (3D) printing is the construction of a solid structure from a digital model. 3D reconstruction was performed using contrast-enhanced computed tomography scan, and 3D-printed models were built based on the main anatomic structures of the liver. 3D-printed models were used in two patients with indication of surgery; one woman with inherited thrombocytopenia and liver metastases from colorectal adenocarcinoma with no response to chemotherapy, and one man with chronic liver infection and hepatocellular carcinoma. The implementation of 3D printing technology was very useful, as it facilitated the understanding of the spatial relationships among the anatomical structures in both cases. In our experience, the use of 3D-printed models was very useful for preoperative planning and for understanding the anatomic landmarks. The model was built in 7 days, with a cost of 380 dollars which is elevated in our environment.

Trauma hepático grave con compromiso vascular y fuga biliar. Reporte de dos casos / Severe liver trauma with vascular compromise and biliary leak. Report of two cases

Introducción: El hígado se lesiona con mayor frecuencia en un trauma de abdomen de alta energía, con una incidencia entre 1 % y 8 %. Las lesiones traumáticas de las vías biliares son muy raras. Casos clínicos: Presentamos dos pacientes con trauma hepático grave, y compromiso ex-trahepático vascular y de la vía biliar; y el abordaje quirúrgico para preservar funcional-mente ambos lóbulos: Masculino de 1 año, trauma hepático grado V, lesión incompleta de vena porta derecha, a nivel de la bifurcación y del conducto biliar hepático izquierdo. Se reparó el daño portal y de la vía biliar. Femenina de dos años, trauma cerrado de abdomen, lesión del parénquima de lóbulo derecho del hígado, sección total del conducto hepático izquierdo, y contusión pancreática asociada. En ambos casos se realizó una hepáticoyeyunostomía en Y de Roux y conservación de ambos lóbulos. Conclusión: En los traumas complejos hepáticos que involucran ambos lóbulos, la evolución depende de calidad de la masa residual. La cirugía conservadora con reconstrucciones vasculares y biliares, evita un fallo hepático agudo, permite ganar tiempo hasta la regeneración funcional del parénquima y proteger de una eventual insuficiencia hepática post-operatoria.

Introduction: The liver is more frequently injured in high-energy abdominal trauma, with an incidence between 1% and 8%. Traumatic injuries to the bile ducts are infrequent. Clinical cases: We present two patients with severe liver trauma and extrahepatic vascular and bile duct involvement and the surgical approach to preserve both lobes functionally: 1-year-old male, grade V liver trauma, incomplete injury to the right portal vein, at the level of the bifurca-tion and the left hepatic bile duct. The portal and bile duct damage was repaired. Two-year-old female, blunt abdominal trauma, injury to the parenchyma of the right lobe of the liver, whole section of the left hepatic duct, and associated pancreatic contusion. In both cases, a Roux-en-Y hepatic jejunostomy was performed, and both lobes were preserved. Conclusion: In complex liver trauma involving both lobes, the evolution depends on the quality of the residual mass. Conservative surgery with vascular and biliary reconstructions avoids acute liver failure, allows time to gain until the funct.

Bases anatómicas y aplicación clínica inicial del abordaje glissoniano intrahepático en las hepatectomías / Anatomical bases and initial clinical application of the intrahepatic Glissonian approach in hepatectomies / Bases anatômicas e aplicação clínica inicial da abordagem glissoniana intra-hepática em hepatectomias

Introducción: El control pedicular durante las resecciones hepáticas puede hacerse mediante disección hiliar extrahepática (DHE) o abordaje glissoniano (AG). El AG intrahepático (AGI) según técnica de Machado puede brindar ciertas ventajas, especialmente en disecciones difíciles. Sin embargo, es menos empleado que la DHE. Objetivo: Analizar las bases anatómicas del AGI y comunicar nuestra experiencia clínica inicial. Material y métodos : El AGI según técnica de Machado se practicó en seis (6) hígados cadavéricos. Luego se hizo la disección hepática para valorar la efectividad del cargado pedicular y medir la profundidad de los diferentes pedículos glissonianos. La aplicación clínica de la técnica fue gradual y selectiva, aplicándola cuando nos parecía factible y que aportaba alguna ventaja sobre la DHE. Resultados: en los 6 hígados cadavéricos fue posible realizar el cargado de todos los pedículos glissonianos (lobares y sectoriales bilateralmente, así como los segmentarios izquierdos). Estos se encuentran a una profundidad menor a 2 cm de la capsula hepática, siendo accesibles para su control mediante AGI. La principal excepción es el pedículo anterior derecho, cuyo nacimiento es más profundo, lo que asociado a su origen en sentido cefálico y a veces ramificado, puede hacer más difícil su cargado. La aplicación del AGI se llevo a cabo en 5 pacientes, en todos fue efectiva, insumió poco tiempo y no tuvo complicaciones intraoperatorias. Conclusiones: el AGI según técnica de Machado es un procedimiento sistematizado, reproducible, factible y seguro, aún en su aplicación clínica inicial. El conocimiento anatómico de los pedículos glissonianos es fundamental para llevarlo a cabo con éxito.

Introduction: Pedicle control during liver resections can be done by extrahepatic hilar dissection (EHD) or the Glissonian approach (GA). Intrahepatic GA (IGA) according to the Machado technique can offer certain advantages, especially in difficult dissections. However, it is used less than the DHE. Objective : to analyze the anatomical bases of the IGA and to communicate our initial clinical experience. Material and methods : IGA according to the Machado technique was performed on six (6) cadaveric livers. Liver dissection was then performed to assess the effectiveness of pedicle loading and measure the depth of the different Glissonian pedicles. The clinical application of the technique was gradual and selective, applying it when it seemed feasible and that it provided some advantage over DUS. Results : in the 6 cadaveric livers it was possible to load all the Glissonian pedicles (lobar and sectoral bilaterally, as well as the left segmental ones). These are found at a depth of less than 2 cm from the hepatic capsule, being accessible for control by IGA. The main exception is the right anterior pedicle, whose origin is deeper, which, associated with its cephalad and sometimes branched origin, can make it more difficult to load. The application of the IGA was carried out in 5 patients, in all of them it was effective, it took little time and there were no intraoperative complications. Conclusions: the IGA according to the Machado technique is a systematic, reproducible, feasible and safe procedure, even in its initial clinical application. The anatomical knowledge of the Glissonian pedicles is essential to carry it out successfully.

Introdução: o controle pedicular durante as ressecções hepáticas pode ser feito por dissecção hilar extra-hepática (DHE) ou abordagem Glissoniana (AG). A AG intra-hepática (AGI) segundo a técnica de Machado pode oferecer algumas vantagens, principalmente em dissecções difíceis. No entanto, é usado menos do que o DHE. Objetivo: Analisar as bases anatômicas da AGI e comunicar nossa experiência clínica inicial. Material e métodos : A AGI segundo a técnica de Machado foi realizada em seis (6) fígados cadavéricos. A dissecção do fígado foi então realizada para avaliar a eficácia da carga pedicular e medir a profundidade dos diferentes pedículos Glissonianos. A aplicação clínica da técnica foi gradativa e seletiva, aplicando-a quando parecia viável e que proporcionava alguma vantagem sobre o USD. Resultados: nos 6 fígados cadavéricos foi possível carregar todos os pedículos Glissonianos (lobares e setoriais bilateralmente, assim como os segmentares esquerdos). Estes são encontrados a menos de 2 cm da cápsula hepática, sendo acessíveis para controle por AGI. A principal exceção é o pedículo anterior direito, cuja origem é mais profunda, o que, associado à sua origem cefálica e por vezes ramificada, pode dificultar o carregamento. A aplicação da AGI foi realizada em 5 pacientes, em todos foi eficaz, em pouco tempo e sem complicações intraoperatórias. Conclusões : AGI segundo a técnica de Machado é um procedimento sistemático, reprodutível, factível e seguro, mesmo em sua aplicação clínica inicial. O conhecimento anatômico dos pedículos Glissonianos é essencial para realizá-lo com sucesso.

Nuevos avances en cirugía hepática: evaluación y planificación preoperatoria (Parte 1) / New advances in liver surgery: evaluation and preoperative planning

Resumen Los avances en la cirugía hepática de los últimos años han permitido resecciones hepáticas más extensa y complejas para el tratamiento de diferentes patologías del hígado sin un aumento excesivo de la morbimortalidad perioperatoria. El desarrollo de diferentes técnicas, tecnologías y herramientas para la evaluación preoperatoria han mejorado la planificación quirúrgica con el uso por ejemplo de las tecnologías audiovisuales e impresión de modelos en 3 dimensiones (3D) de alta fidelidad. Otros avances, han permitido realizar una mejor evaluación funcional del parénquima hepático y una caracterización más precisa de las lesiones con el uso por ejemplo de verde de indocianina, cintigrafía hepática y resonancia magnética con contraste hepatoespecífico. Este artículo describe algunos de los nuevos avances en la evaluación y planificación preoperatoria en cirugía hepática.

Advances in liver surgery in recent years have made it possible to achieve more extensive and complex liver resections for the treatment of different liver diseases without an excessive increase in perioperative morbidity and mortality. The development of different techniques, technologies and tools for preoperative evaluation have improved surgical planning with the use, for example, of audiovisual technologies and printing of high-fidelity 3-dimensional (3D) models. Other advances have allowed a better functional evaluation of the liver parenchyma and a more precise characterization of the lesions with the use, for example of indocyanine green or liver scintigraphy and magnetic resonance with hepatospecific contrast. This article describes some of the new advances in preoperative evaluation and planning in liver surgery.

Trasplante hepático por metástasis hepáticas irresecables de cáncer colorrectal: revisión de la literatura / Liver transplantation for non-resectable colorectal liver metastases: A review

In Chile, colorectal cancer ranks third in incidence and fifth in mortality. Half of these patients have liver metastases at the diagnosis, and only 30% of them are resectable. Despite the development of many complex hepatobiliary procedures to achieve the total resection of metastases, the long-term survival with these techniques is not good. Liver transplantation is an alternative to treat unresectable liver metastasis from colorectal cancer with a good outcome. Several prognostic scores allow the selection of patients with good tumor biology. These patients have better overall and disease-free survival after liver transplantation. The use of immunosuppressive treatment doesn't increase recurrence, and even the pattern of tumor growth is slower in liver transplant recipients. The purpose of this review is to summarize the current evidence in this topic and to highlight the need for a formal protocol for liver transplantation for unresectable colorectal liver metastases, using living donors or marginal grafts to avoid competition with the rest of the national waiting list.

Hepatectomía derecha totalmente laparoscópica para trasplante hepático con donante vivo adulto-adulto: técnica quirúrgica y experiencia inicial en Chile / Pure laparoscopic right hepatectomy for adult-to-adult living donor liver transplantation: surgical technique and initial experience in Chile

Resumen El trasplante hepático con donante vivo (THDV) es un procedimiento complejo y desafiante para el cirujano, ya que exige garantizar tanto la máxima seguridad para el donante, así como también, la mejor calidad del injerto para el receptor. Debido a lo anterior, la implementación de la cirugía mini-invasiva ha sido lenta en esta área. Sin embargo, en los últimos 10 años, gracias a los avances que ha experimentado la cirugía hepática laparoscópica, ha aumentado el interés de algunos grupos altamente especializados por incorporar la cirugía mini-invasiva a la cirugía del donante, principalmente en trasplante hepático donante vivo adulto-pediátrico (THDVA-P). Los favorables resultados obtenidos en esta área incluso han llevado a los expertos en el tema, a categorizar el abordaje laparoscópico para la cirugía del donante como el procedimiento estándar en THDVA-P. Contrario a lo anterior, la implementación de la laparoscopía para trasplante hepático donante vivo adulto-adulto (THDVA-A), es más compleja y requiere en su mayoría, una hepatectomía de lóbulo derecho o izquierdo para cumplir con las necesidades volumétricas del receptor. Esta cirugía es de mayor dificultad y riesgo para el donante, por lo que su indicación por vía mini-invasiva está limitada a centros de alto volumen y preparación, tanto en laparoscopía, como en trasplante hepático. En este trabajo, se busca dar a conocer la técnica quirúrgica y nuestra experiencia inicial con la primera hepatectomía derecha totalmente laparoscópica (HDTL) para THDVA-A realizada en Chile.

Living donor liver transplantation is a complex and challenging procedure. The surgeon needs to guarantee maximum safety for the donor, as well as the best quality of the graft for the recipient. For this reason, the implementation of mini-invasive surgery has been slow in this area. However, in the last 10 years, due to the advances in laparoscopic liver surgery, the interest of some highly specialized groups has increased in incorporating mini-invasive surgery into donor surgery, mainly in pediatric living donor liver transplantation. The favorable results obtained in this field, have even led to turn this procedure, into the technique of choice for pediatric living donor liver transplantation. Nevertheless, this procedure is even more challenging for adult-to-adult living donor transplantation. To meet the volumetric criteria of an adult, a complete hepatectomy of right or left lobe is mostly required. This surgery is of greater complexity and risk for the donor, so its indication by minimally invasive approach is limited to high-volume centers with preparation, both in laparoscopy and liver transplants. In this report we seek to present our surgical technique and initial experience with the first pure laparoscopic right hepatectomy for adult-to-adult living donor liver transplantation carried out in Chile.

Investigation of the effect of ultrasonography-guided bilateral erector spinae plane block on postoperative opioid consumption and pain scores in patients undergoing hepatectomy: a prospective, randomized, controlled study

ABSTRACT BACKGROUND: There is still a debate about what constitutes effective and safe postoperative analgesia in hepatectomy surgery. Erector spinae plane (ESP) block may be an important part of multimodal analgesia application in hepatectomy surgery. OBJECTIVES: To compare the effects of ultrasound-guided bilateral erector spinae plane block combined with intravenous (iv) patient-controlled analgesia (iv PCA), in comparison with iv PCA alone, in hepatectomy surgery. DESIGN AND SETTINGS: Randomized prospective single-blinded study in a tertiary university hospital. METHODS: Fifty patients scheduled for elective hepatectomy surgery were included in the study. Patients were randomized into the ESP group or the control group. In the ESP group, bilateral ESP block was performed preoperatively and iv PCA was used. In the control group, only iv PCA was used. Numerical rating scale (NRS) scores at rest and coughing, analgesic requirements and occurrences of nausea and vomiting were recorded. RESULTS: Intraoperative and postoperative opioid consumption, rescue analgesia requirement and resting and dynamic NRS scores were significantly lower in the ESP group (P < 0.05). There was no significant difference between two groups in terms of the presence of dynamic pain after the first postoperative hour. While all patients in the control group had nausea and vomiting, 24% of the patients in the ESP group did not have nausea and vomiting. CONCLUSION: This study showed that ESP block can be used as a part of multimodal analgesia, with the benefit of reducing opioid consumption and postoperative nausea and vomiting in hepatectomy surgery. CLINICAL TRIAL REGISTRATION: ACTRN12620000466943.

Ultrasound-Guided Continuous Thoracic Paravertebral Block Improves Patient's Quality of Recovery After Open Hepatectomy: A Randomized, Double-Blind, Placebo-Controlled Trial / 中国医学科学杂志(英文版)

Background Ultrasound-guided continuous thoracic paravertebral block can provide pain-relieving and opioid-sparing effects in patients receiving open hepatectomy. We hypothesize that these effects may improve the quality of recovery (QoR) after open hepatectomy. Methods Seventy-six patients undergoing open hepatectomy were randomized to receive a continuous thoracic paravertebral block with ropivacaine (CTPVB group) or normal saline (control group). All patients received patient-controlled intravenous analgesia with morphine postoperatively for 48 hours. The primary outcome was the global Chinese 15-item Quality of Recovery score on postoperative day 7, which was statistically analyzed using Student's t-test. Results Thirty-six patients in the CTPVB group and 37 in the control group completed the study. Compared to the control group, the CTPVB group had significantly increased global Chinese 15-item Quality of Recovery scores (133.14 ± 12.97 vs. 122.62 ± 14.89, P = 0.002) on postoperative day 7. Postoperative pain scores and cumulative morphine consumption were significantly lower for up to 8 and 48 hours (P < 0.05; P = 0.002), respectively, in the CTPVB group. Conclusion Perioperative CTPVB markably promotes patient's QoR after open hepatectomy with a profound analgesic effect in the early postoperative period.

Practice of laparoscopic hepatectomy in primary care facilities in China: surgical planning, surgical techniques and postoperative management / 南方医科大学学报

With the development and application of laparoscopic hepatectomy in major medical centers, domestic and foreign guidelines have summarized the indications, surgical techniques and operational procedures of the surgery. But in primary care facilities, where the surgical equipment are available, laparoscopic hepatectomy is performed only in a small number of cases and the progress of its application remains slow. The reasons possibly lie in the failure of a full understanding of the surgery, the lack of anatomical knowledge of laparoscopic hepatectomy, the lack of close multidisciplinary cooperation in the perioperative period and insufficient training of laparoscopic technology. In this review, we elaborate on three aspects of laparoscopic hepatectomy: preoperative planning, surgical techniques and postoperative management. Before the operation, the surgeons should fully understand the anatomical structure of the liver and select appropriate cases considering both the difficulty of operation and the surgical experience of the surgeons. During the operation, the position of the patient and the layout of the stamping card should be appropriate, and the central venous pressure needs to be well controlled in close cooperation with the anesthesiologist. The surgeons should be proficient at the techniques of liver suspension and pulling and at the use of ultrasonic knife, and select correct techniques for management of bleeding and the control of blood flow in and out of the liver. The patient should receive postoperative management with standard enhanced recovery after surgery (ERAS) protocols. These experiences may help to improve the practice of laparoscopic hepatectomy in local hospitals or primary care facilities.

Research progress of adjuvant TACE therapy for liver cancer after radical resection / 中华肝脏病杂志

Transcatheter arterial chemoembolization (TACE) is the most commonly used method for non-surgical treatment of liver cancer, and it is usually used as an adjuvant therapy in patients who have not developed intrahepatic metastases after surgical resection. Postoperative adjuvant TACE therapy may provide a prognostic benefit in liver cancer patients with high recurrence risk. This article reviews the research progress of adjuvant TACE therapy for liver cancer after radical resection.

Clinical application of bipolar tweezers-clamp for hepatic parenchymal transection / 中华外科杂志

Objective: To investigate the clinical value of the bipolar tweezers-clamp for the hepatic parenchymal transection in the resection of hepatocellular carcinoma. Methods: From January 2020 to January 2021,63 patients with the hepatocellular carcinoma for hepatectomy at Department of Hepatopancreatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College were analyzed retrospectively.According to the different instruments used in the hepatic parenchymal transection,the patients were divided into bipolar tweezers-clamp group and ultrasonic scalpel group.There were 32 patients in bipolar tweezers-clamp group,with age of (55.5±10.5)years(range:37 to 78 years),including 22 males and 10 females,tumor size was (6.0±3.4)cm(range:2.4 to 13.4 cm). There were 6 patients with portal vein tumor thrombus and 5 patients with portal hypertension. There were 31 patients in ultrasonic scalpel group,with aged(57.8±10.1)years(range:37 to 79 years),including 27males and 4 females,tumor size was(7.9±5.1)cm(range: 2.4 to 21.3 cm),3 patients with portal vein tumor thrombus and 2 patients with portal hypertension. The preoperative baseline data,operation time,blood loss,postoperative liver function and the complications were compared between two groups using t test,χ2 test and Fisher exact probabilityrespectively. Results: The operation was successfully completed in both groups.Compared with the ultrasonic scalpel group,the operation time was significantly shorter((219.3±76.4)minutes vs.(294.0±100.8)minutes,t=-3.322,P=0.002),the blood loss was less((250(475)ml vs. 500(1 050)ml,t=-2.307,P=0.026),the concentrate red blood cells transfusion volume was less(0.92(0.88)U vs. 2.32(4.00)U,Z=-1.987,P=0.047) in the bipolar tweezers-clamp group.The postoperative serum ALB level was higher in the bipolar tweezers-clamp group than that in the ultrasonic scalpel group((33.5±6.1)g/L vs. (29.5±4.2)g/L,t=3.226,P=0.020) on postoperative day 1;((35.7±4.5)g/L vs.(30.1±3.2)g/L,t=5.575,P<0.01) on postoperative day 3;((33.2±3.7)g/L vs. (31.0±4.4)g/L,t=3.020,P=0.004) on postoperative day 7. There was no significant difference in serum ALT,TBIL and PT level between the two groups(all P>0.05).No postoperative bile leakage occurred in both groups.The postoperative complications occurred in 8 cases(25.0%)in the bipolar tweezers-clamp group,including liver failure in one,and in 11 cases(35.5%)in the ultrasonic scalpel group,including liver failure in two(P>0.05). Conclusion: The bipolar tweezers-clamp is a safe and reliable method for the hepatic parenchymal transaction,which is quick and less bleeding during the hepatic resection.