Application of triangle stability mechanical model in the layer separation of transanal total mesorectal excision / 中华胃肠外科杂志

Transanal total mesorectal resection (taTME) has come a long way since it was first used in the clinic in 2010.The learning curve of this procedure is long due to different surgical approaches, different perspectives and different anatomical positions. Many surgeons experience complications during this procedure. Although the advantages and problems of this procedure have been reported in much literature, the anatomy and operation methods of taTME introduced in literatures and training centers are too complicated, which makes many surgeons encounter difficulties in carrying out taTME surgery. According to the author's experience in learning and carrying out this operation, spatial expansion process of ultralow rectal cancer was divided into three stages. At each stage, according to different pulling forces, three different schemes of triangular stability mechanics model were adopted for separation. From point to line, from line to plane, the model can protect the safety of peripheral blood vessels and nerves while ensuring total mesorectal excision . This model simplifies the complex surgical process and is convenient for beginners to master taTME surgical separation skills.

Resección vascular mayor por adenocarcinoma pancreático ductal: reporte del primer caso registrado en Paraguay / Major vascular resection for pancreatic ductal adenocarcinoma: case report, of first case reported in Paraguay

El adenocarcinoma pancreático ductal (APD) es la cuarta causa de muerte por cáncer y se proyecta que para el 2030 ocupe el segundo lugar. El pronóstico es sombrío, siendo la sobrevida menor a 9% en 5 años. Se consideró durante mucho tiempo a la resección quirúrgica como el único tratamiento curativo, sin embargo, sólo el 15 a 20% de los pacientes pueden ser beneficiados con la misma. La clasificación pre terapéutica más utilizada es la del National Comprehensive Cáncer Network (NCCN), basada en la relación del tumor con estructuras vasculares, clasificándolos en tumores "resecables", de resección límite "Borderlines" y "localmente avanzados". Se presenta el primer caso registrado en Paraguay de APD con infiltración de la Vena Mesentérica Superior (VMS) tratado con duodenopancreatectomía cefálica (DPC) asociada a resección vascular mayor.

Pancreatic ductal adenocarcinoma (PDA) is the fourth leading cause of cancer death and is projected to rank second by 2030. The prognosis is bleak, with survival being less than 9% in 5 years. For a long time, surgical resection was considered the only curative treatment, however, only 15 to 20% of patients can benefit from it. The most widely used pre-therapeutic classification is that of the National Comprehensive Cancer Network (NCCN), based on the relationship of the tumor with vascular structures, classifying them into "resectable", "borderline" and "locally advanced" tumors. We present the first registered case in Paraguay of PDA with infiltration of the Superior Mesenteric Vein (SMV) treated with cephalic duodenopancreatectomy (CPD) associated with major vascular resection.

Short-term complications after transanal total mesorectal excision for mid-low rectal cancer / 中华胃肠外科杂志

Objective: To summarize short-term postoperative complications of transanal total mesorectal excision (taTME) in the treatment of middle-low rectal cancer. Methods: A descriptive case series of cases was constructed. Clinical data of consecutive 83 patients with mid-low rectal cancer who received taTME treatment from November 2016 to April 2021 at Department of General Surgery of Beijing Friendship Hospital, Capital Medical University were collected. Among 83 patients, 58 (69.9%) were males, with a mean age of (61.4±11.8) years; 42 (50.6%) were low rectal cancer, 41 (49.4%) were middle rectal cancer. Short-term postoperative complication was defined as complication occurring within 30 days after operation. The complication was graded according to the Clavien-Dindo classification. At the same time, the morbidity of short-term postoperative complication in the first 40 patients and that in the last 43 patients were compared to understand the differences before and after passing the taTME learning curve. Results: Two patients (2.5%) were converted to laparotomy ; 78 (94.0%) completed anastomosis.While 5 (6.0%) underwent permanent stoma. The total operation time of transabdominal+ transanal procedure was (246.9±85.0) minutes, and the median intraoperative blood loss was 100 (IQR: 100) ml. Seventy-five cases (75 /78, 96.2%) underwent defunctioning stoma, including 74 cases of diverting ileostomy, 1 case of diverting transverse colostomy and 3 cases without stoma. The morbidity of complication within 30 days after operation was 38.6% (32/83), and the morbidity of complication after discharge was 8.4% (7/83). Minor complications accounted for 31.3% (26/83) and major complications accounted for 7.2% (6/83). No patient died within 30 days after operation. The incidence of anastomotic leakage was 15.4% (12/78). Eight patients (9.6%) were hospitalized again due to complications after discharge. The median postoperative hospital stay was 7 (IQR: 3) days. All the patients with minor (I-II) complications received conservative treatment. One patient with grade C anastomotic leakage was transferred to intensive care unit and received a second operation due to sepsis and multiple organ dysfunction. Two patients with paralytic ileus (Clavien-Dindo IIIa) underwent endoscopic ileus catheter placement. There were 3 patients with Clavien-Dindo III or above respiratory complications, including 1 patient with pleural effusion and ultrasound-guided puncture, 2 patients with respiratory failure who were improved and discharged after anti-infection and symptomatic treatment. One patient underwent emergency ureteral stent implantation due to urinary infection (Clavien-Dindo IIIb). The morbidity of postoperative complication in the first 40 cases was 50.0% (20/40), and that in the latter 43 cases decreased significantly (27.9%, 12/43), whose difference was statistically significant (χ(2)=4.270, P=0.039). Conclusions: The procedure of taTME has an acceptable morbidity of short-term postoperative complication in the treatment of mid-low rectal cancer. The accumulation of surgical experience plays an important role in reducing the morbidity of postoperative complication.

Quality indicators of transanal total mesorectal excision (TaTME) for rectal cancer

Introduction: Transanal total mesorectal excision (TaTME) has revolutionized the surgical techniques for lower-third rectal cancer. The aim of the present study was to analyze the outcomes of quality indicators of TaTME for rectal cancer compared with laparoscopic TME (LaTME). Methods: A cohort prospective study with 50 (14 female and 36male) patients, with a mean age of 67 (range: 55.75 to 75.25) years, who underwent surgery for rectal cancer. In total, 20 patients underwent TaTME, and 30, LaTME. Every TaTME procedure was performed by experienced colorectal surgeons. The sample was divided into two groups (TaTME and LaTME), and the quality indicators of the surgery for rectal cancer were analyzed. Results: There were no statistically significant differences regarding the patients and the main characteristics of the tumor (age, gender, American Society of Anesthesiologists [ASA] score, body mass index [BMI], tumoral stage, neoadjuvant therapy, and distance from the tumor to the external anal margin) between the two groups. The rates of: postoperativemorbidity (TaTME: 35%; LaTME: 30%; p=0.763);mortality (0%); anastomotic leak (TaTME: 10%; LaTME: 13%; p=0.722); wound infection (TaTME: 0%; LaTME: 3.3%; p=0.409); reoperation (TaTME: 5%; LaTME: 6.6%; p=0.808); and readmission (TaTME: 5%; LaTME: 0%; p=0.400), as well as the length of the hospital stay (TaTME: 13.5 days; LaTME: 11 days; p=0.538), were similar in both groups. There were no statistically significant differences in the rates of positive circumferential resection margin (TaTME: 5%; LaTME: 3.3%; p=0.989) and positive distal resection margin (TaTME: 0%; LaTME: 3.3%; p=0.400), the completeness of the TME (TaTME: 100%; LaTME: 100%), and the number of lymph nodes harvested (TaTME: 15; LaTME: 15.5; p=0.882) between two groups. Conclusion: Transanal total mesorectal excision is a safe and feasible surgical procedure for middle/lower-third rectal cancer. (AU)

ELAPE: rol actual en el tratamiento del cáncer de recto bajo / ELAPE: current role in the treatment of low rectal cancer

Resumen En este artículo se discute el origen del concepto ELAPE ( extralevator abdominoperineal excision) en el tratamiento quirúrgico del cáncer del recto bajo, las variantes técnicas asociadas con la resección "cilíndrica", las indicaciones actuales, las limitaciones técnicas asociadas y los resultados publicados en la literatura mundial. Considerando la evidencia actual se propone la utilización en casos seleccionados de acuerdo al estudio clínico y por imágenes, donde la resonancia magnética de la pelvis tiene un rol predominante. La técnica tradicional de la amputación abdominoperineal (comúnmente asociada a Miles) se mantiene como una alternativa válida en el manejo quirúrgico de algunos pacientes con un tumor localmente avanzado del recto bajo.

This article discusses the origin of the ELAPE concept (abdominoperineal excision extralevator) in the surgical treatment of low rectal cancer, the technical variants associated with "cylindrical" resection, current indications, associated technical limitations and the results published in the world literature Considering the current evidence, the use is proposed in selected cases according to the clinical study and imaging, where the magnetic resonance of the pelvis has a predominant role. The traditional abdominal-perineal amputation technique (commonly associated with Miles) remains a valid alternative in the surgical management of some patients with a locally advanced tumor of the lower rectum.

Tumor de Ackerman perianal / Ackerman's perianal tumor

Introducción: El carcinoma verrucoso o tumor de Ackerman es una rara entidad relacionada con la infección por el virus del papiloma humano, comportándose como una variante menos agresiva del carcinoma epidermoide. Caso clínico: Presentamos el caso clínico de un paciente de sexo masculino de 45 años portador de una gran lesión perianal con compromiso del canal anal y el aparato esfinteriano. Discusión: Existen varias alternativas para el tratamiento del tumor de Ackerman. Sin embargo en casos como este, y sobre todo ante la ausencia de respuesta al tratamiento de quimioradioterapia, se requiere de una resección amplia y radical. Pese a ello, la recidiva es frecuente. Conclusiones: En el caso analizado se destaca la forma particularmente agresiva de esta patología, con extensa invasión local y pobre respuesta al tratamiento oncoespecífico inicial.

Introduction: Verrucous carcinoma or Ackerman's tumor is a rare entity related to human papillomavirus infection, behaving as a less aggressive variant of squamous cell carcinoma. Clinical case: We present the case of a 45-year-old male patient with a large perianal lesion with involvement of the anal canal and sphincter. Discussion: Ackerman tumor treatment admits different therapeutic modalities; however, in cases such as this, and especially in the absence of response to chemo-radiotherapy treatment, a broad and radical resection is required. Despite this, recurrence is frequent. Conclusions: The particularly aggressive form of this pathology, with extensive local invasion and poor response to the initial oncoespecific treatment, stands out in the analyzed case

Desarrollo de la resección colo-rectal mínimamente invasiva en un servicio de cirugía universitario / Development of Minimally Invasive Colo-Rectal Resection in a University Surgery Service / Desenvolvimento de ressecção colo-rretal minimamente invasiva em serviço de cirurgia universitária

Introducción: A pesar de que la evidencia actual respalda ampliamente el abordaje laparoscópico para las resecciones de colon y recto en función de su seguridad y resultados oncológicos, el desarrollo y adopción del mismo ha sido lento y aún hoy no es de rutina en la mayoría de los centros. Se presenta la experiencia inicial en la Clínica Quirúrgica 2 del Hospital Maciel. Métodos: Estudio retrospectivo que comprende 41 resecciones laparoscópicas en el período 2016-2018. Resultados: El tiempo operatorio medio fue de 3 h para las colectomías y 4 h para las resecciones de recto. El porcentaje de conversión fue de 10%, la falla de sutura del 12% y la mortalidad a 30 días del 13%. Discusión: El abordaje laparoscópico para la colectomía y resección de recto es seguro y con aceptables resultados oncológicos de acuerdo a nuestros resultados. La curva de aprendizaje se sustenta en el volumen anual de cirugías, la realización de otros procedimientos de laparoscopía avanzada y el entrenamiento en simuladores. Conclusiones: nuestra experiencia muestra resultados inmediatos similares a los reportados en la literatura nacional, aunque el tiempo seguimiento aún es insuficiente para analizar los resultados oncológicos a largo plazo.

Introduction: Although current evidence widely supports the laparoscopic approach for resections of the colon and rectum according to their safety and oncological results, the development and adoption of the same has been slow and even today is not routine in most centers. The initial experience is presented in the Surgical Clinic 2 of the Maciel Hospital. Methods: A retrospective study comprising 41 laparoscopic resections in the period 2016-2018. Results: The mean operative time was 3 hours for colectomies and 4 hours for rectal resections. The conversion rate was 10%, the suture failure was 12% and the 30-day mortality was 13%. Discussion: The laparoscopic approach for colectomy and rectal resection is safe and with acceptable oncological results according to our results. The learning curve is based on the annual volume of surgeries, the performance of other advanced laparoscopy procedures and training in simulators. Conclusions: our experience shows immediate results similar to those reported in the national literature, although the follow-up time is still in sufficient to analyze the long-termoncological results.

Introdução: Embora as evidências atuais apóiem amplamente a abordagem laparoscópica para ressecções do cólon e do reto de acordo com sua segurança e resultados ontológicos, o desenvolvimento e a adoção dos mesmos têm sido lentos e até hoje não é rotineiro na maioria dos casos os centros. A experiência inicial é apresentada na Clínica Cirúrgica 2 do Hospital Maciel. Métodos: Estudo retrospectivo com 41 ressecções laparoscópicas no período 2016-2018. Resultados: O tempo operatório médio foi de 3 horas para colectomias e 4 horas para ressecções retais. A taxa de conversão foi de 10%, a falha na sutura foi de 12% e a mortalidade em 30 dias foi de 13%. Discussão: A abordagem laparoscópica para a colectomia e ressecção retal é segura e com resultados ontológicos aceitáveis de acordo com nossos resultados. A curva de aprendizado é baseada no volume anual de cirurgias, no desempenho de outros procedimentos avançados de laparoscopia e no treinamento em simuladores. Conclusões: nossa experiência mostra resultados imediatos semelhantes aos relatados na literatura nacional, embora o tempo de seguimento ainda seja insuficiente para analisar os resultados ontológicos em longo prazo.

Resección anterior del recto ultrabaja laparoscópica con anastomosis coloanal en cáncer del recto bajo / Laparoscopic Ultralow Anterior Rectal Resection with Coloanal Anastomosis in Low Rectum Cancer

RESUMEN Introducción: La resección anterior del recto ultrabaja laparoscópica con anastomosis coloanal evita la realización una colostomía definitiva. Objetivo: Determinar las indicaciones, describir la técnica quirúrgica y mostrar los resultados a largo plazo obtenidos en la realización de este proceder en el tratamiento del cáncer del recto bajo. Método: Se realizó un estudio observacional descriptivo y prospectivo de 53 pacientes con cáncer del recto bajo en el período comprendido entre octubre 2007 y noviembre 2018 en el Centro Nacional de Cirugía de Mínimo Acceso. Todas las resecciones fueron llevadas a cabo por un grupo dedicado a la cirugía colorrectal, en todos los casos se realizó la excisión total del mesorrecto. Resultados: Se operaron mediante esta técnica 53 pacientes, 30 masculinos y 23 femeninos con un promedio de edad de 57 años (rango 23-81) y de ellos 42 (79,2 por ciento) después de terapia neoadyuvante. El promedio de tiempo quirúrgico fue de 195 min (rango 90-360) y las pérdidas hemáticas estimadas, de 72 mL. La incidencia de morbilidad mayor fue de 16,9 por ciento (9/53) y la media de estadía hospitalaria de 6,3 días. La media del periodo de seguimiento fue de 40 meses (rango 1-132) con una recidiva local de 9,4 por ciento (5/53) y una supervivencia global a los 5 años de 80,3 por ciento. Conclusiones: La resección anterior del recto ultrabaja laparoscópica con anastomosis coloanal es una técnica segura con excelentes resultados en cuanto a recidiva local y supervivencia global(AU)

ABSTRACT Introduction: Laparoscopic ultralow anterior rectal resection with coloanal anastomosis prevents the performance of a definitive colostomy. Objective: To determine the indications, describe the surgical technique and show the long-term outcome of performing this procedure in the treatment of cancer of the lower rectum. Method: A descriptive and prospective observational study of 53 patients with low rectal cancer was carried out in the period between October 2007 and November 2018, at the National Center for Minimum Access Surgery. All resections were carried out by a group dedicated to colorectal surgery. In all cases, the total mesorectal excision was performed. Results: 53 patients (30 males and 23 females), with an average age of 57 years (range 23-81) and 42 (79.2 percent) after neoadjuvant therapy were operated using this technique. The average surgical time was 195 min (range 90-360) and the estimated blood loss was 72 mL. The incidence of major morbidity was 16.9 percent (9/53) and the average hospital stay was 6.3 days. The mean follow-up period was 40 months (range 1-132), with a local relapse of 9.4 percent (5/53) and a 5-year overall survival of 80.3 percent. Conclusions: Laparoscopic ultralow anterior resection of the rectum with coloanal anastomosis is a safe technique with excellent outcomes in terms of local relapse and overall survival(AU)

Implementación segura de la escisión total mesorrectal transanal (TaTME) en la práctica clínica / Safe implementation of total transanal mesorectal excision (TaTME) in clinical practice

Introducción: La escisión total del mesorrecto transanal (TaTME) es una técnica quirúrgica moderna que busca mejorar los resultados oncológicos sorteando dificultades anatómicas y propias del tumor en el cáncer de recto medio e inferior. La expansión de esta operación condujo a complicaciones propias que no se observaban con los procedimientos tradicionales puramente transabdominales. Es por esto que existen recomendaciones de expertos a seguir en el inicio de la práctica del TaTME. Objetivo: Mostrar resultados en la serie inicial de TaTME implementando estrategias de seguridad. Diseño: Análisis retrospectivo sobre una base de datos prospectiva. Métodos: Entre mayo de 2015 y junio de 2018 se seleccionaron pacientes con adenocarcinoma de recto medio o bajo con margen circunferencial de resección respetado sin enfermedad a distancia irresecable. Los pacientes fueron operados con la técnica TaTME por un mismo cirujano "en formación en TaTME" con experiencia y alto volumen de casos de cáncer de recto, habiendo realizado cursos homologados. En algunos de los casos se contó con la asistencia de un especialista internacional "proctor". Resultados: En el período estudiado se operaron 8 pacientes mediante TaTME. Edad media de 62 años (53-77). Siete recibieron Quimiorradioterapia preoperatoria (88%). Todas las piezas tuvieron un margen distal negativo, en 7 de 8 la resección del mesorrecto fue completa y en uno incompleta. El promedio de ganglios resecados fue de 12,5 (6-21). La mediana de tiempo operatorio fue de 351 minutos (255-480). La media de días de internación fue de 10.6 (4-19). Siete pacientes tuvieron complicaciones en el postoperatorio, 4 Clavien I y 3 II. Conclusiones: La aplicación de las estrategias de seguridad durante la implementación de una técnica nueva como el TaTME, ayudaría a la disminución de complicaciones intra y postoperatorias con buenos resultados desde el punto de vista oncológico. (AU)

Introduction: Transanal total mesorectal excision (TaTME) is a modern surgical technique that seeks the best oncological results avoiding anatomic and tumor-specific difficulties in middle and low rectal cancer. The spread of this operation led to complications that were not observed with traditional procedures in a purely transabdominal approach. That is why there are recommendations to follow when starting the TaTME practice. Objective: To show our initial results in TaTME operation implementing security strategies. Design: Retrospective analysis based on a prospective database. Methods: Between May 2015 and June 2018, patients with middle or low rectal adenocarcinoma, with respected circumferential margin in absence of distant unresectable disease were selected. Patients were operated with the TaTME technique by the same surgeon "trainee" with experience and high case volume of rectal cancer, who attended to different courses on the matter. In some of the cases, there was assistance of an international "proctor" specialist. Results: In the period of study, 8 patients underwent surgery through TaTME. Mean age was 62 years (53-77). Seven received preoperative chemoradiotherapy (88%). All the specimens had a negative distal margin, in 7 out of 8, resection of the mesorectum was complete whereas it was incomplete in one. The mean number of resected lymph nodes was 12.5 (6-21). The median operative time was 351 minutes (255-480). The mean time of hospital stay was 10.6 days (4-19). Seven patients had complications in the postoperative period, 4 Clavien I and 3 II. Conclusions: Application of safety strategies during the implementation of a new technique such as TaTME, would help to reduce intra and postoperative complications with good results from the oncological point of view. (AU)

Evaluación comparativa en calidad de vida de pacientes con RAUB, RAUBIE vs RAP por cáncer de recto. Informe preliminar / Comparative evaluation in quality of life of patients with RAUB, RAUBIE vs APR for rectal cancer. Preliminary report

Resumen Introducción: La resección abdominoperineal (RAP) era el tratamiento estándar del cáncer de recto medio o bajo quedando el paciente sin ano y con una ostomía permanente. En los últimos 20 años el desarrollo de nuevas técnicas quirúrgicas, con adecuados resultados quirúrgicos y oncológicos, han permitido ofrecer al paciente la preservación del aparato esfinteriano, sin embargo, éstas pueden presentar problemas de tipo funcional lo que podría derivar en una alteración de la calidad de vida del paciente. Objetivo: Comparar la alteración en la calidad de vida en pacientes sometidos a RAP versus técnicas con preservación de esfínter anal en pacientes operados por cáncer de recto. Materiales y Método: Estudio de cohorte transversal con pacientes operados por cáncer de recto medio-bajo en nuestro hospital entre los años 2009 a 2015. Se utiliza el instrumento EuroQuol-5D2,3 validado en español chileno. Resultados: Se incluyen 39 pacientes, 11 corresponden a colostomía definitiva y 28 a preservación de esfínter. En el análisis por dominios se observaron diferencias significativas en el grupo con ostomía definitiva en el ítem de actividades habituales y a favor de la preservación de esfínter en el ítem sexualidad. Conclusiones: La técnica quirúrgica utilizada en pacientes con cáncer rectal medio-bajo altera la calidad de vida, razón por la cual debe ser adecuadamente seleccionada y además advertir al paciente de las consecuencias que dicha cirugía puede ocasionar.

Introduction: The abdominoperineal resection (APR) was the standard treatment of middle-low rectal cancer, in the last 20 years the development of sparing techniques with sphincter preservation with adequate surgical and oncological results has allowed to offer the patient the sphincter apparatus preservation, avoiding the definitive colostomy, however, these techniques may present secondary incontinence to the loss of the rectum. Both surgical options can affect the quality of life of the patient and this element should be considered. Objective: To compare the change in quality of life of patients undergoing APR vs sphincter preserving techniques in patients operated for rectal cancer. Materials and Method: Cross-sectional cohort study with medium-low rectal cancer patients, operated in our hospital from 2009 to 2015. The instrument EuroQuol-5D2, validated in chilean spanish is used. Results: 39 patients were included (11 definitive colostomy and 28 sphincter preservation). In the analysis by domains, significant differences were observed favor to definitive colostomy in the Item of "Habitual Activities" and favor to sphincter preservation in the Item "Sexuality". Conclusions: In patients with middle-low rectal cancer, the choice of surgical technique have a measurable impact on the patient's quality of life.

Mobilização da flexura esplênica nas ressecções dos tumores de reto e sigmoide: meta-análise dos resultados cirúrgicos / Splenic flexure mobilization in sigmoid and rectal cancer resections: a meta-analysis of surgical outcomes

RESUMO Objetivo: avaliar a influência da mobilização da flexura esplênica nos principais resultados cirúrgicos de pacientes submetidos à ressecção de câncer do cólon sigmoide ou reto. Métodos: os bancos de dados MEDLINE, Cochrane Central Register de Ensaios Controlados e LILACS foram pesquisados usando os termos "mobilização da flexura esplênica", "cirurgia colorretal", "câncer retal", "ressecção anterior", "câncer de cólon sigmoide", "ressecção de sigmoide". O desfecho principal foi a deiscência da anastomose. Outros desfechos analisados foram mortalidade, sangramento, infecção e complicações gerais. Os tamanhos dos efeitos foram estimados por meio do agrupamento dos dados de seis estudos de caso-controle (1.433 pacientes) publicados até janeiro de 2018. Resultados: nossa meta-análise revelou que pacientes submetidos à mobilização completa da flexura esplênica tinham um risco maior de deiscência anastomótica (RR=2,27, IC95%: 1,22-4,23) em comparação àqueles não submetidos a esse procedimento. Nenhuma diferença pôde ser demonstrada entre os grupos em termos de mortalidade, sangramento, infecção e complicações gerais. Conclusão: a mobilização da flexura esplênica está associada a um maior risco de deiscência anastomótica nas ressecções de câncer de reto ou cólon sigmoide. Esta manobra cirúrgica deve ser utilizada com cautela no manejo cirúrgico dos tumores colorretais.

ABSTRACT Objective: to evaluate the influence of the splenic flexure mobilization for the main surgical outcomes of patients submitted to resection of sigmoid and rectal cancer. Methods: we searched the MEDLINE, Cochrane Central Register of Controlled Trials and LILACS, using the terms "splenic flexure mobilization", "colorectal surgery", "rectal cancer", "anterior resection", "sigmoid colon cancer", and "sigmoid resection". The main outcome was anastomotic dehiscence. Other outcomes analyzed were mortality, bleeding, infection and general complications. We estimated the effect sizes by grouping data from six case-control studies (1,433 patients) published until January 2018. Results: our meta-analysis showed that patients undergoing complete mobilization of the splenic flexure had a higher risk of anastomotic dehiscence (RR=2.27, 95%CI: 1.22-4.23) compared with those not submitted to this procedure. There was no difference between the groups in terms of mortality, bleeding, infection and general complications. Conclusion: splenic flexure mobilization is associated with a higher risk of anastomotic dehiscence in resections of sigmoid and rectal cancer. This surgical maneuver should be used with caution in the surgical management of sigmoid or rectal cancers.

Robotic rectal resection: preliminary Russian experience / Ressecção retal robótica: experiência preliminar russa

ABSTRACT Purpose: To outline the preliminary experience of the da Vinci® robotic system used in a Moscow tertiary colorectal referral center for an unselected range of benign and malignant rectal conditions. Methods: Prospective non-randomized single-center study which analyzed results of 26 robotic rectal resections performed between january 2014 and december 2016. Results: The cohort included 10 females and 16 males (mean total age 61.6 years). Three patients underwent surgery for benign rectal villous adenomas. The median overall ASA score was 4 (ranged from 2 to 5). Of the surgeries, there were 19 total mesorectal excisions with 6 patients undergoing a multivisceral resection. The mean operating time was 358 minutes with a mean blood loss of 203 mL. All total mesorectal excision specimens were adjudged according Philip Quirke classification as mesorectal plane - Grade 3 with a mean of 18.5 lymph nodes identified (from 12 to 35). Of these there were 10 patients (38.5%) with lymph node metastases. After surgery the average pain score was 2.1 out of 10 on the "Visual-Analogue Pain Intensity Scale" and 1.5 score out of 10 on the "Brief Pain Inventory with Quality of Life". Anal continency after rectal resection with total mesorectal excisions estimated according Wexner Scale: 10 days after surgery average score was -3.1 and a 6 month after surgery -1.6 score. The median length of hospital stay was 11 days (from 10 to 15). Conclusion: Our initial experience with a totally robotic rectal resection has shown the technique to be safe and feasible, particularly in patients where conventional laparoscopic rectal resection would be anticipated to be challenging.

RESUMO Objetivo: Delinear a experiência preliminar do sistema robótico da Vinci® usado em um centro de referência colorretal terciário de Moscou para uma gama não selecionada de problemas retais benignos e malignos. Métodos: Estudo unicêntrico prospectivo não randomizado que analisou os resultados de 26 ressecções retais robóticas realizadas entre janeiro de 2014 e dezembro de 2016. Resultados: A coorte incluiu 10 mulheres e 16 homens (idade total média de 61,6 anos). Três pacientes foram submetidos à cirurgia para adenomas vilosos retais benignos. O escore global mediano da ASA foi de 4 (variou de 2 a 5). Das cirurgias, houve 19 excisões mesorretais totais com 6 pacientes submetidos à ressecção multivisceral. O tempo médio de cirurgia foi de 358 minutos, com perda sanguínea média de 203 mL. Todas as amostras de excisão total do mesorreto foram classificadas de acordo com a classificação de Philip Quirke como plano mesorretal - Grau 3 com uma média de 18,5 linfonodos identificados (de 12 a 35). Destes, havia 10 pacientes (38,5%) com metástases linfonodais. Após a cirurgia, o escore médio de dor foi de 2,1 de 10 na Escala de Intensidade da Dor Visual-Analógica e de 1,5 de 10 no "Inventário Breve de Dor com Qualidade de Vida". Continência anal após ressecção retal com excisões totais mesorretais estimadas de acordo com a Escala de Wexner: 10 dias após a cirurgia o escore médio foi -3,1 e um escore de -1,6 após 6 meses da cirurgia. A mediana do tempo de internação foi de 11 dias (de 10 a 15). Conclusão: Nossa experiência inicial com uma ressecção retal totalmente robótica mostrou que a técnica é segura e viável, particularmente em pacientes nos quais a ressecção retal laparoscópica convencional seria prevista como um desafio.

Reconstrucción perineal con colgajo miocutáneo vertical de recto anterior del abdomen luego de amputación abdomino perineal extraelevador. Una alternativa factible para el cirujano colorrectal / Perineal reconstruction with vertical myocutaneous flap of the anterior rectus abdominis after extra-elevating perineal abdominal amputation. A feasible alternative for the colorectal surgeon

Las complicaciones perienales luego de la amputación abdominoperineal son frecuentes y clínicamente relevantes en términos de estadía hospitalaria, costos, calidad de vida y los resultados oncológicos. La utilización creciente de radioterapia pre operatoria y la incorporación gradual a la técnica extra-elevador, ha llevado a un aumento en la morbilidad perineal. Es por elloque la búsqueda de una técnica confiable y con buenos resultados para el cierre perineal se hace necesaria. Se han publicado muchas series que describen diferentes técnicas de cierre del defecto perineal, pero faltan estudios clínicos de alta calidad que indiquen cuál es la mejor opción. Cuando la proctectomía resulta en un amplio defecto perineal, el colgajo vertical del recto del abdomen parece ser la mejor opción. Presentamos dos casos de tumores anorectales localmente avanzados en los que se realizó una amputación abdominoperineal extraelevador con posterior reconstrucción perineal con colgajo de recto anterior y, a su vez, describimos la técnica quirúrgica. (AU)

Perineal complications after abdominoperineal amputation are frequent and clinically relevant in terms of hospital stay, costs, quality of life and oncological results. The growing utilization of pre-operative radiotherapy and the gradual incorporation to the extra-elevator technique, has leaded to an increase in perineal morbidity. That is why the search for a reliable technique with good postoerative outcomes for the perineal closure is necessary. Many series describing different closure techniques of the perineal defect have been published, but high quality clinical studies have to indicate which the best option is. When the proctectomy results in a wide perineal defect, the vertical rectus abdominis flap seems to be the best option. We presented two cases of locally advanced anorectal tumors in which an extraelevatory abdominoperineal amputation was carried out with posterior perineal reconstruction with vertical rectus abdomins flap and we described the surgical technique. (AU)

Leiomiosarcoma rectal: reporte de un caso / Rectal leiomyosarcoma: a case report

Introducción: Los leiomiosarcomas (LMS) son tumores raros del tubo digestivo, corresponden a neoplasias malignas originadas de células de músculo liso, representando sólo el 0,1% del total. La localización rectal se da en el 11% de los LMS, aunque representan menos del 1% de los tumores malignos colón- icos. En nuestro medio también es una patología de baja frecuencia. Objetivo: Exponer método diagnóstico, tratamiento, y resultado quirúrgico en paciente con LMS rectal. Caso Clínico: Paciente mujer, 53 años, atendida en el Hospital Padre Hurtado, gran tabáquica, que se presentó con un cuadro de 1 año de evolución de dolor perianal, defecación laboriosa y 3 episodios de rectorragia. Al examen físico presentaba al tacto rectal a 4 cm del margen anal una masa de ±2 cm de superficie irregular y de consistencia pétrea. Se realizó colonoscopía objetivando la masa tumoral y tomando biopsia la que se informó como LMS rectal, incluyendo resultados de inmunohistoquímica. Siguiendo con el estudio se realizó TAC y RNM. Se decide la intervención quirúrgica realizándose una resección anterior baja, sin incidentes durante la cirugía y con un buen postoperatorio. Conclusión: El leiomiosarcoma es de extrema baja frecuencia en nuestro país, con sólo pocos casos reportados. La confirmación diagnóstica es con biopsia e inmunohistoquímica. La cirugía sugerida en la literatura es la resección anterior baja, la que se realiza en este caso con buenos resultados. (AU)

Introduction: Leiomyosarcomas (LMS) are rare digestive tract tumors. It is a malignant tumor originated from smooth muscle cells, representing only 0.1% of the total. Rectal location is given in 11% of LMS, however, they represent less than 1% of all malignant colon tumors. It is a very infrequent tumor in our medium. Objective: Show the diagnostic method, treatment, and surgical result. Case Presentation: A 53-year-old female, treated in Padre Hurtado Hospital, heavy smoker, presented with a 1-year history of perianal pain, difficulty during defecation, and three episodes of rectal bleeding. Digital rectal examination showed a mass 4 cm from the anal margin of approximately 2 cm, of irregular surface, and very hard consistency. A colonoscopy was performed, objectivating the tumoral mass and taking a biopsy which was informed as a rectal LMS, including immunohistochemistry results. Continuing with the study, a CT-Scan and MRI were performed. Treatment of choice was surgery; a low anterior resection was carried out with no incidents during the surgery and a favorable post-operatory. LMS is extremely infrequent in our country, with only a few cases reported. Conclusion: Diagnostic confirmation is made through biopsy and immunohistochemistry. Surgery suggested by literature is low anterior resection, which was carried out in this case with good results. (AU)

Resección rectal por vía perineal mediante engrapadora lineal: experiencia inicial de una nueva técnica para el tratamiento del rectocele anterior / Rectal resection perineally via a linear stapler: initial experience of a new technique for the treatment of the anterior rectocele

Introducción: Analizar los resultados a corto y mediano plazo del tratamiento del rectocele anterior mediante la resección rectal transperineal con engrapadora lineal y refuerzo del tabique rectovaginal con malla. Prospectivo de casos consecutivos. Pacientes y método: Entre 01 de abril de 2008 y 31 de Marzo de 2010, 12 pacientes fueron tratados en nuestra institución por presentar diagnóstico de Rectocele Anterior. Los pacientes fueron evaluados por cirujanos entrenados; sometidos a manometría anorrectal y estudios imagenológicos dinámicos. Se realizó una técnica de Resección Rectal por vía perineal con engrapadora lineal y la aplicación de malla. Se aplicaron distintos scores para evaluar los resultados. Resultados: El 100% fueron sexo femenino, edad promedio 44,6 años. El tiempo promedio de cirugía fue 164 minutos (r: 135-180). No hubo complicaciones intraoperatorias. La estadía media hospitalaria fue 2,6 días. La morbilidad fue del 16,6% (2) y no hubo mortalidad relacionada al procedimiento. La evaluación basal del score ODS mostró un promedio de 19.16, mientras el promedio determinado al 7 y 21 día postoperatorio fue 0,5 y 0,16 respectivamente (P = 0,001). La evaluación del estreñimiento usando el score PAC-SYM mostró un resultado basal promedio de 17,08, mientras que al 7 y 21 día postoperatorio fue 3,25 y 1,32 respectivamente (P = 0,002). El cuestionario de Satisfacción a los 6 meses mostró mejoría significativa respecto al valor basal (p = 0,001). Conclusión: Esta nueva técnica permite restaurar el tabique rectovaginal resecando el defecto rectal. Los resultados funcionales obtenidos son favorables, con baja morbilidad y pocas complicaciones relacionadas al uso de mallas. (AU)

Objective: To analyze short and mid-term results of anterior rectocele treatment by trans perineal rectal resection with linear stapler and rectovaginal septum reinforcement with mesh. Patients and methods: Between 01April 2008 and 31 March 2010, 12 patients were treated at our institution with diagnosis of Anterior Rectocele. Patients were evaluated by trained surgeons, underwent anorectal manometry and dynamic images studies. We performed a novel technique called "Stapled Perineal Rectocele resection". Different scores were applied to evaluate the results. Results: 100% were female, average age 44.6 years. The mean surgical time was 164 minutes (r: 135-180). There were no intraoperative complications. The average hospital stay was 2.6 days. The morbidity was 16.6% (2) and there was no procedure-related mortality. Baseline of ODS showed an average score of 19.16, while the average determined at 7 and 21 days postoperatively was 0.5 and 0.16 respectively (P = 0.001). The assessment of constipation using the PAC-SYM score showed a mean baseline of 17.08 results, while at 7 and 21 days after surgery was 3.25 and 1.32 respectively (P = 0.002). The patient satisfaction score after six months showed significant improvement from baseline (p = 0.001). Conclusion: The novel technique restores rectovaginal septum and extirpates the rectal defect. The functional results are favorable, with low morbidity and few complications related to the use of mesh. (AU)