RESUMO Os óbitos relacionados ao câncer colorretal são geralmente associadas às suas metástases que afetam o fígado (50%), por via hematogênica. Aproximadamente 20-25% desses pacientes já apresentam metástases sincrônicas no fígado no momento do diagnóstico do tumor primário. Em outros, as metástases hepáticas ocorrerão durante o curso da doença e são chamadas de metacrônicas. Acredita-se que as metástases metacrônicas tenham um melhor prognóstico, no entanto, 20%-25% dos casos metastáticos podem ser ressecados durante o curso da doença. Não há consenso sobre o intervalo de tempo diagnóstico para que uma metástase seja considerada metacrônica na literatura consultada. O tratamento cirúrgico das metástases e dos linfonodos é indicado, e a doença neoplásica extra-hepática deve ser cuidadosamente avaliada. O transplante de fígado pode beneficiar o paciente, deve ser avaliado e é indicado em algumas situações especiais.

ABSTRACT Deaths related to colorectal cancer are generally associated with its metastases that affect the liver (50%) through the hematogenous route. Approximately 20-25% of these patients already have synchronous metastases in the liver at the time of primary tumor diagnosis. In others, liver metastases will occur during the course of the disease and are called metachronous. Metachronous metastases are believed to have a better prognosis; however, 20-25% of metastatic cases can be resected during the course of the disease. There is a lack of consensus on the diagnostic time interval for metastases to be considered metachronous in the consulted literature. Surgical treatment of metastases and lymph nodes is indicated, and extrahepatic neoplastic disease must be carefully evaluated. Liver transplantation can benefit the patient, should be evaluated, and is indicated in some special situations.

ABSTRACT Schistosomiasis is an infectious disease caused by parasitic flatworms of the genus Schistosoma. The species Schistosoma mansoni is associated with hepatosplenic disease. Schistosomiasis involving the gallbladder alone is highly unusual, with a few cases reported. Herein, we present the case of a woman from a region with endemic schistosomiasis who presented with a painless solid lesion and wall thickening of the gallbladder. She underwent an uneventful laparoscopic cholecystectomy. Microscopic examination of the surgical specimen revealed Schistosoma mansoni eggs associated with granulomatous reaction, leading to the diagnosis of schistosomiasis of the gallbladder, prompting subsequent treatment with praziquantel and follow-up. This case illustrates the importance of suspicion for this diagnosis in endemic areas, as it can be misdiagnosed with malignancy if not examined microscopically. Complications and treatment strategies are poorly characterized for the few cases of schistosomiasis; reporting this case can serve as a helpful reminder of a rare presentation of this disease.

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

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

ABSTRACT The present manuscript aimed to review the historical development and most important contributions regarding Lynch Syndrome since its first description, more than a century ago. In 1895, a reputed pathologist from Michigan University, Dr. Aldred Scott Warthin, got intrigued by the family history of a local seamstress called Pauline Gross. According to her prevision, she would present an early death due to cancer, which actually happened (from the uterus). Historically, her family was designated “Family G”, comprising a group recognized as the longest and most detailed cancer genealogy that has ever been studied. Warthin concluded that its members had genetic susceptibility for cancer, and they are, nowadays, considered the first reported Lynch Syndrome family. At that time, however, the medical cancer community was far less receptive to the association between heredity and cancer, despite the description of other families with similar heredograms. Unfortunately, this historical fact remained somewhat dormant until another investigator inaugurated a new era in the understanding of family cancer clusters. After reports and studies from this family and many others, the condition initially called Cancer Family Syndrome was changed to the eponym Lynch Syndrome. This was a recognition of the extensive and dedicated work developed by Dr. Henry Lynch in describing various characteristics of the disease, and his efforts to establish the correct recommendations for its diagnosis and treatment. Although the future announces there is still far to go for a complete understanding of Lynch Syndrome, the remarkable contributions of Pauline’s intuition, Warthin’s perseverance, and Lynch’s work consistency must never be forgotten by those who already have or will still benefit from this knowledge.

RESUMO O objetivo do presente manuscrito foi fazer uma revisão histórica do desenvolvimento e das mais importantes contribuições em relação à Síndrome de Lynch, desde sua primeira descrição há mais de um século atrás. Em 1895, o reputado patologista Dr. Aldred Scott Warthin ficou intrigado com a história familiar de uma costureira local, chamada Pauline Gross. De acordo com a sua previsão, ela morreria precocemente devido a um câncer, o que realmente aconteceu (do útero). Historicamente, sua família foi designada como Família “G”, caracterizando um grupo reconhecido como a maior e mais longa árvore genealógica relacionada ao câncer familiar jamais estudada. Warthin concluiu que os membros dessa família tinham susceptibilidade genética para câncer, e ainda hoje são considerados a primeira família com Síndrome de Lynch reportada na literatura. Entretanto, naquela época a comunidade médica oncológica não era receptiva à associação entre hereditariedade e câncer, a despeito da descrição de outras famílias com heredogramas similares. Infelizmente, esse fato histórico permaneceu esquecido até que outro investigador inaugurou uma nova era para a melhor compreensão da agregação familiar do câncer. Após diversas descrições dessa mesma agregação de casos de câncer em outras famílias, essa condição inicialmente denominada Síndrome de Câncer Familial foi mudada para o epônimo Síndrome de Lynch. Esse foi um reconhecimento ao extenso e dedicado trabalho desenvolvido pelo Dr. Henry Lynch na descrição de diversas características da doença e seus esforços para estabelecer as recomendações corretas para o seu diagnóstico e tratamento. Embora o futuro anuncie que ainda teremos um longo caminho a percorrer para a completa compreensão da Síndrome de Lynch, as contribuições extraordinárias da intuição de Pauline, da perseverança de Warthin e da consistência do trabalho de Lynch nunca devem ser esquecidas por àqueles que já se beneficiaram, bem como os que ainda irão se beneficiar de todo esse conhecimento.

RESUMO A remoção completa da doença metastática e a manutenção de um remanescente hepático adequado continuam sendo o único tratamento com intenção curativa em relação às metástases hepáticas colorretais. A cirurgia impacta no prognóstico de longo prazo e as complicações afetam adversamente os resultados oncológicos. A morbidade real envolvendo esse cenário é discutível e estimada variando de 15 a 50%. Complicações pós-operatórias eventualmente levam a um aumento nas taxas de mortalidade e recorrência do tumor. Fístula biliar e insuficiência hepática são as principais complicações após a ressecção hepática para câncer colorretal metastático. A drenagem profilática não previne fístulas ou hemorragia. A drenagem junto com intervenção endoscópica e/ou cirurgia pode ser necessária para fístulas de graus B e C. A insuficiência hepática é uma complicação potencialmente letal com poucas opções terapêuticas. A seleção do paciente e os cuidados pré-operatórios são cruciais para sua prevenção.

ABSTRACT Complete removal of metastatic disease and maintenance of an adequate liver remnant remains the only treatment option with curative intent concerning colorectal liver metastases. Surgery impacts on the long-term prognosis and complications adversely affect oncological results. The actual morbidity involving this scenario is debatable and estimated to be ranging from 15% to 50%. Postoperative complications eventually lead to an increase in both mortality rates and tumor recurrence. Biliary fistula and liver failure are the leading complications following liver resection to metastatic colorectal cancer. Prophylactic drainage does not prevent fistulas or hemorrhage. Drainage along with endoscopic intervention and/or surgery may be necessary for grade B and C fistulas. Liver failure is a potentially lethal complication with few therapeutic options. Patient selection and preoperative care are crucial for its prevention.

RESUMO O desenvolvimento de técnicas cirúrgicas, quimioterapia, agentes biológicos e abordagens multidisciplinares converteram pacientes com metástases hepáticas colorretais irressecáveis (CRLM) para cirurgia elegível. Muitas estratégias foram desenvolvidas para permitir aos pacientes a ressecção cirúrgica (embolização percutânea da veia porta, privação venosa hepática, cirurgia hepática poupadora de parênquima, estratégia reversa, ALPPS, transplante de fígado), a única forma de controle da doença e tratamento curativo.

ABSTRACT The development of surgical techniques, chemotherapy, biological agents, and multidisciplinary approaches have made patients with unresectable colorectal liver metastases eligible for surgery. Many strategies have been developed to allow patients for surgical resection (percutaneous portal vein embolization, liver venous deprivation, parenchyma-sparing liver surgery, reverse strategy, associating liver partition and portal vein ligation for staged hepatectomy, and liver transplantation), the only form of disease control and curative treatment.

RESUMO RACIONAL: O modelo de residência médica, estabelecido há mais de um século e padrão-ouro para formação dos especialistas médicos, tem crescente importância. Assim, é crucial compreender o perfil dos residentes e suas mudanças ao longo do tempo. OBJETIVOS: Avaliar os graduados da residência em Cirurgia Digestiva e Coloproctologia no Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP) quanto às atividades profissionais, acadêmicas e de pesquisa; analisar as mudanças nos perfis dos residentes, o impacto da pós-graduação nas atividades profissionais e as diferenças entre aqueles que trabalham na capital paulista e em outras regiões. MÉTODOS: Enviado questionário digital com 42 perguntas aos graduados que iniciaram treinamento entre 1979 e 2021. Realizada análise em subgrupos conforme eras (Era 1: 1979-2000; Era 2: 2001-2021), impacto da pós-graduação e locais de trabalho. RESULTADOS: 213 graduados responderam ao questionário (87,6%). O treinamento teve impacto significativo na vida profissional de todos respondentes, com 92,5% dispostos a escolher a mesma especialidade novamente. Respondedores da Era 2 apresentaram proporção maior de mulheres, residentes fora da capital paulista e formados em instituições fora da FMUSP. Aqueles pós-graduados estavam mais envolvidos em atividades acadêmicas e de pesquisa, publicando mais trabalhos, sendo membros de sociedades e realizando mais procedimentos assistidos por robôs. Aqueles fora da capital paulista estavam mais envolvidos em procedimentos endoscópicos e associados a convênio médicos. CONCLUSÕES: A maioria dos graduados considerou a residência médica fundamental para o desenvolvimento da carreira. Mudanças sociais e econômicas influenciaram os perfis dos residentes e suas atividades pós-programa.

ABSTRACT BACKGROUND: The medical residency model, established over a century ago, remains the gold standard for medical education. Given its increasing significance in imparting expertise in medical specialties, understanding the profile of residents and changes over time is crucial. AIMS: This study aimed to assess graduates of digestive surgery and coloproctology residency programs at Hospital das Clínicas of the Faculdade de Medicina da Universidade de São Paulo (HCFMUSP) regarding their professional, academic, and research activities. It also aimed to analyze changes in resident profiles over the years, the impact of postgraduation on professional activities, and differences between graduates working in São Paulo capital and elsewhere. METHODS: A digital survey with 42 questions was sent to graduates who commenced training between 1979 and 2021. Results were analyzed in subgroups based on two eras (Era 1: 1979–2000; Era 2: 2001–2021), the impact of postgraduation, and respondents’ work locations. RESULTS: The survey was responded by 213 graduates (87.6%). The training significantly impacted all respondents’ professional lives, with 92.5% willing to choose the same specialty again. Graduates from Era 2 showed a higher proportion of females, residents of cities other than São Paulo, and graduates from institutions outside FMUSP. Postgraduate responders were more involved in academic and research activities, publishing more papers, holding societal memberships, and performing more robot-assisted procedures. Those outside São Paulo capital were more involved in endoscopic procedures and associated with medical insurance. CONCLUSIONS: The majority of graduates considered medical residency fundamental for career development. Social and economic changes influenced residents’ profiles and post-program activities.

RESUMO RACIONAL: Os tumores neuroendócrinos pancreáticos (TNEP) são neoplasias raras e heterogêneas, frequentemente com comportamento biológico indolente. A incidência está aumentando, em parte devido à disseminação de técnicas de imagem de alta resolução, o que impacta o diagnóstico de tumores esporádicos não funcionantes, responsáveis por até 80% dos casos. Embora a ressecção cirúrgica seja a única opção curativa, o impacto de fatores como grau tumoral, tamanho e tipo no prognóstico e recidiva do tumor ainda é incerto. OBJETIVOS: Investigar os fatores prognósticos e desfechos de pacientes com TNEP esporádicos tratados cirurgicamente. MÉTODOS: Foram analisados, retrospectivamente, pacientes com TNEP esporádicos submetidos à ressecção pancreática. Dados foram coletados de prontuários médicos. RESULTADOS: Foram incluídos 113 pacientes: 32 com TNEP não funcionantes (TNEP-NF), 70 com insulinomas e 11 com outros tumores funcionantes (TNEP-OF). Pacientes com insulinoma eram mais jovens, com maior IMC, menor prevalência de comorbidades, menor escore ASA, e foram submetidos a maior número de enucleações pancreáticas comparados aos pacientes com TNEP-OF e TNEP-NF. O grupo de insulinoma apresentou mais tumores grau I, menor diâmetro tumoral, menor estadiamento TNM e menor recidiva da doença. Na análise univariada, idade, tipo, tamanho do tumor e TNM foram fatores de risco para recidiva. Na análise multivariada, apenas o tipo TNEP-NF foi identificado como fator prognóstico independente para recidiva. CONCLUSÕES: Tumores não funcionantes TNEP apresentam fator de risco prognóstico independente para recidiva da doença. Este achado endossa a necessidade de observação com seguimento mais rigoroso de pacientes com tumores pequenos selecionados para tratamento conservador.

ABSTRACT BACKGROUND: Pancreatic neuroendocrine tumors (PNETs) are uncommon and heterogeneous neoplasms, often exhibiting indolent biological behavior. Their incidence is rising, largely due to the widespread use of high-resolution imaging techniques, particularly influencing the diagnosis of sporadic non-functioning tumors, which account for up to 80% of cases. While surgical resection remains the only curative option, the impact of factors such as tumor grade, size, and type on prognosis and recurrence is still unclear. AIMS: To investigate prognostic risk factors and outcomes in patients with sporadic PNETs treated surgically. METHODS: A retrospective analysis was conducted on patients with sporadic PNETs who underwent pancreatic resection. Data were collected from medical records. RESULTS: A total of 113 patients were included: 32 with non-functioning tumors (NF-PNETs), 70 with insulinomas, and 11 with other functioning tumors (OF-PNETs). Patients with insulinoma were significantly younger, had a higher BMI, lower prevalence of comorbidities and ASA scores, and underwent significantly more pancreatic enucleations compared to patients with OF-PNET and NF-PNET. The insulinoma group had more grade I tumors, smaller tumor diameter, lower TNM staging, and lower disease recurrence rates. In univariate analysis, age, tumor type, tumor size, and TNM staging were identified as potential risk factors for tumor recurrence. In multivariate analysis, only the NF-PNET type was identified as an independent prognostic factor for disease recurrence. CONCLUSIONS: NF-PNETs are an independent prognostic risk factor for disease recurrence. This finding supports the need for closer follow-up of patients with small tumors who are selected for conservative management.

RESUMO Pacientes com metástase colorretal hepática sincrônica, a ressecção do tumor primário e das metástases hepáticas é a única estratégia potencialmente curativa. Nesses casos, não há consenso sobre se a ressecção do tumor primário e das metástases deve ser realizada simultaneamente ou se uma abordagem em estágios deve ser realizada (ressecção do tumor primário e depois, hepatectomia ou hepatectomia primeiro). Pacientes que não têm oclusão intestinal e têm uma doença hepática extensa são encaminhados para terapia oncológica neoadjuvante. Quando o paciente não tem remanescente hepático futuro suficiente (geralmente 30–40% do total), muitas estratégias podem ser usadas: embolização da veia porta, privação hepática, hepatectomia em dois estágios e ALPPS (partição do fígado e a ligadura da veia porta). Portanto, uma abordagem multidisciplinar é necessária no tratamento desses pacientes.

ABSTRACT In patients with synchronic liver colorectal metastasis, resection of the primary tumor and liver metastases is the only potentially curative strategy. In such cases, there is no consensus on whether resection of the primary tumor and metastases should be performed simultaneously or whether a staged approach should be performed (resection of the primary tumor and after, hepatectomy, or hepatectomy first). Patients with no bowel occlusion and with extensive liver disease are advised neoadjuvant oncological therapy. Similarly, various strategies such as portal vein embolization, liver deprivation, two-staged hepatectomy, and associating liver partition and portal vein ligation are available for patients who do not have a sufficient future liver remnant (generally 30-40% of the total). Therefore, a multidisciplinary approach is required for the treatment of these patients.

ABSTRACT BACKGROUND: Hepatosplenic schistosomiasis is an endemic disease prevalent in tropical countries and is associated with a high incidence of portal vein thrombosis. Inflammatory changes caused by both parasitic infection and portal thrombosis can lead to the development of chronic liver disease with potential carcinogenesis. AIMS: To assess the incidence of portal vein thrombosis and hepatocellular carcinoma in patients with schistosomiasis during long-term follow-up. METHODS: A retrospective study was conducted involving patients with schistosomiasis followed up at our institution between 1990 and 2021. RESULTS: A total of 126 patients with schistosomiasis were evaluated in the study. The mean follow-up time was 16 years (range 5–31). Of the total, 73 (57.9%) patients presented portal vein thrombosis during follow-up. Six (8.1%) of them were diagnosed with hepatocellular carcinoma, all with portal vein thrombosis diagnosed more than ten years before. CONCLUSIONS: The incidence of hepatocellular carcinoma in patients with schistosomiasis and chronic portal vein thrombosis highlights the importance of a systematic long-term follow-up in this group of patients.

RESUMO RACIONAL: A esquistossomose hepatoesplênica é uma doença endêmica prevalente em países tropicais e está associada a uma alta incidência de trombose da veia porta. Alterações inflamatórias causadas tanto pela infecção parasitária quanto pela trombose portal podem levar ao desenvolvimento de doença hepática crônica com potencial carcinogênico. OBJETIVOS: Avaliar a incidência de trombose da veia porta e carcinoma hepatocelular em pacientes com esquistossomose durante um seguimento de longo prazo. MÉTODOS: Foi realizado estudo retrospectivo envolvendo pacientes com esquistossomose acompanhados em nossa instituição entre 1990 e 2021. RESULTADOS: Um total de 126 pacientes com esquistossomose foram avaliados no estudo. O tempo médio de acompanhamento foi de 16 anos (variando de 5 a 31). Do total, 73 (57,9%) pacientes apresentaram trombose da veia porta durante o seguimento e seis (8,1%) deles foram diagnosticados com carcinoma hepatocelular, todos com trombose da veia porta diagnosticada há mais de 10 anos. CONCLUSÕES: A incidência de carcinoma hepatocelular em pacientes com esquistossomose e trombose da veia porta crônica destaca a importância de um acompanhamento sistemático de longo prazo nesse grupo de pacientes.

Abstract The impact of Multivisceral Liver Resection (MLR) on the outcome of patients with Colorectal Liver Metastasis (CRLM) is unclear. The present systematic review aimed to compare patients with CRLM who underwent MLR versus standard hepatectomy regarding short- and long-term outcomes. MLR is a feasible procedure but has a higher risk of major complications. MLR did not negatively affect long-term survival, suggesting that an extended resection is an option for potentially curative treatment for selected patients with CRLM.

Abstract Objective: The aim of the present study was to evaluate the clinical features, Hepatocellular Carcinoma (HCC) screening, treatment modalities, and Overall Survival (OS) in a series of Non-Alcoholic Fatty Liver Disease-Related Hepatocellular Carcinoma (NAFLD-HCC) Brazilian patients. Methods: This was a cross-sectional study at the Instituto do Cancer do Estado de São Paulo, at the Faculdade de Medicina da Universidade de São Paulo with the approval of the local research ethics committee. NAFLD patients with HCC diagnosed, from May 2010 to May 2019, were included. Results: A total of 131 patients were included. Risk factors for NAFLD were present in 94.7% of the patients. Only 29% of patients were in the HCC screening program before diagnosis. HCC treatment was performed in 84.7% of patients. Cumulative survival at the end of the first year was 72%, second-year 52%, and fifth-year 32%. HCC screening before diagnosis was not significantly associated with higher cumulative survival. The independent factors associated with shorter general survival were BCLC C-D, p < 0.001, and the size of the largest nodule > 42 mm, p = 0.039. Conclusions: Although the efficacy of screening in our population regarding overall survival was hampered due to the sample size (29% had screening), BCLC stages C‒D and the size of the largest nodule larger than 42 mm were identified as independent factors of worse prognosis.

Abstract Objectives: To evaluate results of patients undergoing liver resection in a single center over the past two decades with a particular look at Colorectal Liver Metastasis (CRLM) and Hepatocellular Carcinoma (HCC). Method: Patients were divided into two eras, from 2000 to 2010 (Era 1) and 2011 to 2020 (Era 2). The most frequent diagnosis was CRLM and HCC, with 738 (52.4%) and 227 (16.1%) cases respectively. An evaluation of all liver resection cases and a subgroup analysis of both CRLM and HCC were performed. Preoperative and per operative variables and long-term outcomes were evaluated. Results: 1409 liver resections were performed. In Era 2 the authors observed higher BMI, more: minimally invasive surgeries, Pringle maneuvers, and minor liver resections; and less transfusion, less ICU necessity, and shorter length of hospital stay. Severe complications were observed in 14.7% of patients, and 90-day mortality was 4.2%. Morbidity and mortality between eras were not different. From 738 CRLM resections, in Era 2 there were significantly more patients submitted to neoadjuvant chemotherapy, bilateral metastases, and smaller sizes with significantly less transfusion, the necessity of ICU, and shorter length of hospital stay. More pedicle clamping, minimally invasive surgeries, and minor resections were also observed. From 227 HCC resections, in Era 2 significantly more minimally invasive surgeries, fewer transfusions, less necessity of ICU, and shorter length of hospital stay were observed. OS was not different between eras for CRLM and HCC. Conclusions: Surgical resection in a multidisciplinary environment remains the cornerstone for the curative treatment of primary and metastatic liver tumors.

A combination of immunosuppressants may improve outcomes due to the synergistic effect of their different action mechanisms. Currently, there is no consensus regarding the best immunosuppressive protocol after liver transplantation. This review aimed to evaluate the effectiveness and safety of tacrolimus associated with mycophenolate mofetil (MMF) in patients undergoing liver transplantation. We performed a systematic review and meta-analysis of randomized clinical trials. Eight randomized trials were included. The proportion of patients with at least one adverse event related to the immunosuppression scheme with tacrolimus associated with MMF was 39.9%. The tacrolimus with MMF immunosuppression regimen was superior in preventing acute cellular rejection compared with that of tacrolimus alone (risk difference [RD]=-0.11; p =0.001). The tacrolimus plus MMF regimen showed no difference in the risk of adverse events compared to that of tacrolimus alone (RD=0.7; p=0.66) and cyclosporine plus MMF (RD=-0.7; p=0.37). Patients undergoing liver transplantation who received tacrolimus plus MMF had similar adverse events when compared to patients receiving other evaluated immunosuppressive regimens and had a lower risk of acute rejection than those receiving in the monodrug tacrolimus regimen.