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ABSTRACT Mixed neuroendocrine-non-neuroendocrine tumors (MiNEN) are a rare type of tumor formed by two components, a non-neuroendocrine component that is most often an adenocarcinoma and a neuroendocrine tumor, and each of these components must represent at least 30% of the tumor. The origin of this tumor on the ampulla of Vater or periampullary region is more infrequent. Usually, the lesions are highly aggressive and quickly metastasizing, and their biological behavior is dictated by the high grade of the neuroendocrine component. This is the first report of a patient with ampullary MiNEN treated employing a robotic pancreaticoduodenectomy. Although being submitted to aggressive treatment with complete surgical resection followed by systemic therapy, the patient developed early recurrence with hepatic metastatic disease, demonstrating the hostile nature of these tumors.

BACKGROUND: Anatomical liver resections are based on some basic technical principles such as vascular control, ischemic area delineation to be resected and maximum parenchymal preservation. These aspects are achieved by the intrahepatic glissonian approach, which consists in accessing the pedicles of hepatic segments within the hepatic parenchyma. Small incisions on well-defined anatomical landmarks are performed to approach the pedicles, making dissection of the hilar plate unnecessary. AIM: Analyze parameters in liver anatomy related to intrahepatic surgical technique to glissonians pedicles, to set the normal anatomy related to the procedure and thereby facilitate the attainment of this technique. METHODS: Anatomical parameters related to the intrahepatic glissonian approach were studied in 37 cadavers. Measurements were performed with precision instruments. Data were expressed as mean±standard deviation. The subjects were divided into groups according to gender and liver weight and groups were compared statistically. RESULTS: Twenty-five cadavers were male and 12 female. No statistically significant difference was observed in virtually all parameters when groups were compared. This demonstrates the consistency of the anatomical parameters related to the intrahepatic glissonian approach. CONCLUSION: The results obtained in this study made possible major technical advances in the realization of open and laparoscopic hepatectomies with intrahepatic glissonian approach, and can help surgeons to perform liver resections by this method.

OBJETIVO: analisar nossa experiência após 107 hepatectomias videolaparoscópicas e discutir a evolução técnica da hepatectomia laparoscópica nos últimos cinco anos. MÉTODOS: entre abril de 2007 e abril de 2012 foram realizadas 107 hepatectomias laparoscópicas em 105 pacientes. A média de idade foi 53,9 anos (17 a 85). Cinquenta e três pacientes eram do sexo masculino. Todas as intervenções foram realizadas pelos autores do trabalho. RESULTADOS: do total de 107 operações, houve necessidade de conversão para a técnica aberta em três casos (2,8%). Dezesseis pacientes (14,9%) apresentaram complicações. Dois pacientes foram a óbito, mortalidade de 1,87%. Um óbito foi decorrente de infarto maciço do miocárdio, sem relação com a hepatectomia laparoscópica, que transcorreu sem intercorrências e não apresentou conversão nem sangramento. O outro óbito foi decorrente de falha do grampeador. Vinte pacientes (18,7%) necessitaram de transfusão sanguínea. O tipo de hepatectomia mais frequente foi a bissegmentectomia, segmentos 2-3, (33 casos), seguida de hepatectomia direita (22 casos). Setenta e duas cirurgias (67,3%) foram realizadas por meio da técnica de acesso Glissoniano. CONCLUSÃO: a divulgação dos resultados é de extrema importância. As dificuldades técnicas, complicações e mesmo mortalidade, inerentes a este complexo tipo de cirurgia, necessitam ser divulgados com clareza. Este procedimento deve ser realizado em centro especializado e por equipe capacitada. A técnica de acesso Glissoniano por via laparoscópica, descrita pela nossa equipe, facilita a realização de hepatectomias anatômicas.OBJECTIVE: To analyze our experience after 107 laparoscopic hepatectomies and discuss the technical evolution of laparoscopic hepatectomy in the last five years. METHODS: Between April 2007 and April 2012 we performed 107 laparoscopic hepatectomies in 105 patients. The mean age was 53.9 years (17 to 85). Fifty-three patients were male. All interventions were performed by the authors. RESULTS: from the total of 107 operations, there was need for conversion to open technique in three cases (2.8%). Sixteen patients (14.9%) had complications. Two patients died, a mortality of 1.87%. One death was due to massive myocardial infarction, unrelated to the procedure, which was uneventful and showed no conversion or bleeding. The other death was due to failure of the stapler. Twenty patients (18.7%) required blood transfusion. The most frequent type of hepatectomy was bisegmentectomy of segments 2-3, (33 cases), followed by right hepatectomy (22 cases). Seventy-two procedures (67.3%) were performed by the technique of Glissonian access. CONCLUSION: The dissemination of results is of utmost importance. The technical difficulties, complications and even death, inherent in this complex type of surgery, need to be clearly disclosed. This procedure should be performed in a specialized center with knowledgeable staff. The technique of laparoscopic Glissonian access, described by our staff, facilitates the realization of anatomical hepatectomies.

INTRODUÇÃO: Na última década, a cirurgia laparoscópica evoluiu e hoje produz menor trauma graças à redução do número e tamanho dos trocárteres. Recentemente nova técnica com uso de portal único foi descrita. OBJETIVO: Descrever os detalhes de uma segmentectomia lateral esquerda (segmentos 2 e 3) laparoscópica com portal único. TÉCNICA: Portal único com cobertura de gel é introduzido por meio de incisão de 3 cm periumbilical. O procedimento inicia-se com exploração da cavidade com laparoscópio e exame ultra-sonográfico do fígado. É realizado Acesso intra-hepático ao pedículo Glissoniano dos segmentos 2 e 3. O pedículo é seccionado com grampeador com carga vascular. O fígado é seccionado com bisturi harmônico e a veia hepática esquerda é dividida com grampeador. A peça é retirada pelo portal único. A cavidade é revista mas não é deixado dreno. CONCLUSÃO: Segmentectomia lateral esquerda laparoscópica com portal único é procedimento seguro desde que realizado em centros especializados e por equipes com experiência em cirurgia hepática e laparoscopia avançada.

OBJETIVO: analisar nossa experiência após 107 hepatectomias videolaparoscópicas e discutir a evolução técnica da hepatectomia laparoscópica nos últimos cinco anos. MÉTODOS: entre abril de 2007 e abril de 2012 foram realizadas 107 hepatectomias laparoscópicas em 105 pacientes. A média de idade foi 53,9 anos (17 a 85). Cinquenta e três pacientes eram do sexo masculino. Todas as intervenções foram realizadas pelos autores do trabalho. RESULTADOS: do total de 107 operações, houve necessidade de conversão para a técnica aberta em três casos (2,8%). Dezesseis pacientes (14,9%) apresentaram complicações. Dois pacientes foram a óbito, mortalidade de 1,87%. Um óbito foi decorrente de infarto maciço do miocárdio, sem relação com a hepatectomia laparoscópica, que transcorreu sem intercorrências e não apresentou conversão nem sangramento. O outro óbito foi decorrente de falha do grampeador. Vinte pacientes (18,7%) necessitaram de transfusão sanguínea. O tipo de hepatectomia mais frequente foi a bissegmentectomia, segmentos 2-3, (33 casos), seguida de hepatectomia direita (22 casos). Setenta e duas cirurgias (67,3%) foram realizadas por meio da técnica de acesso Glissoniano. CONCLUSÃO: a divulgação dos resultados é de extrema importância. As dificuldades técnicas, complicações e mesmo mortalidade, inerentes a este complexo tipo de cirurgia, necessitam ser divulgados com clareza. Este procedimento deve ser realizado em centro especializado e por equipe capacitada. A técnica de acesso Glissoniano por via laparoscópica, descrita pela nossa equipe, facilita a realização de hepatectomias anatômicas.

Context Our experience with laparoscopic pancreatic resection began in 2001. During initial experience, laparoscopy was reserved for selected cases. With increasing experience more complex laparoscopic procedures such as central pancreatectomy and pancreatoduodenectomies were performed. Objectives The aim of this paper is to review our personal experience with laparoscopic pancreatic resection over 11-year period. Methods All patients who underwent laparoscopic pancreatic resection from 2001 through 2012 were reviewed. Preoperative data included age, gender, and indication for surgery. Intraoperative variables included operative time, bleeding, blood transfusion. Diagnosis, tumor size, margin status were determined from final pathology reports. Results Since 2001, 96 patients underwent laparoscopic pancreatectomy. Median age was 55 years old. 60 patients were female and 36 male. Of these, 88 (91.6%) were performed totally laparoscopic; 4 (4.2%) needed hand-assistance, 1 robotic assistance. Three patients were converted. Four patients needed blood transfusion. Operative time varied according type of operation. Mortality was nil but morbidity was high, mainly due to pancreatic fistula (28.1%). Sixty-one patients underwent distal pancreatectomy, 18 underwent pancreatic enucleation, 7 pylorus-preserving pancreatoduodenectomies, 5 uncinate process resection, 3 central and 2 total pancreatectomies. Conclusions Laparoscopic resection of the pancreas is a reality. Pancreas sparing techniques, such as enucleation, resection of uncinate process and central pancreatectomy, should be used to avoid exocrine and/or endocrine insufficiency that could be detrimental to the patient's quality of life. Laparoscopic pancreatoduodenectomy is a safe operation but should be performed in specialized centers by highly skilled laparoscopic surgeons.

Context Pancreatic surgery is an extremely challenging field, and the management of pancreatic diseases continues to evolve. In the past decade, minimal access surgery is moving towards minimizing the surgical trauma by reducing numbers and size of the port. In the last few years, a novel technique with a single-incision laparoscopic approach has been described for several laparoscopic procedures. Objectives We present a single-port laparoscopic spleen-preserving distal pancreatectomy. To our knowledge, this is the first single-port pancreatic resection in Brazil and Latin America. Methods A 33-year-old woman with neuroendocrine tumor underwent spleen-preserving distal pancreatectomy via single-port approach. A single-incision advanced access platform with gelatin cap, self-retaining sleeve and wound protector was used. Results Operative time was 174 minutes. Blood loss was minimal, and the patient did not receive a transfusion. The recovery was uneventful, and the patient was discharged on postoperative day 4. Conclusions Single-port laparoscopic spleen-preserving distal pancreatectomy is feasible and can be safely performed in specialized centers by skilled laparoscopic surgeons.