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Prognostic factors for local recurrence in patients with rectal cancer submitted to neoadjuvant chemoradiotherapy and total mesorectal excision. BACKGROUND: The standard curative treatment for locally advanced rectal cancer of the middle and lower thirds is long-course chemoradiotherapy followed by total mesorectal excision. PURPOSE: To evaluate the prognostic factors associated with local recurrence in patients with rectal cancer submitted to neoadjuvant chemoradiotherapy and total mesorectal excision. METHODS: Retrospective study including patients with rectal cancer T3-4N0M0 or T (any)N + M0 located within 10 cm from the anal border, or patients with T2N0M0 located within 5 cm, treated by long course chemoradiotherapy followed by total mesorectal excision with curative intent. Clinical, demographic, radiologic, surgical, and anatomopathological data were collected. Local recurrence was estimated using the Kaplan-Meier function, and risk was estimated according to each characteristic using univariate and multivariate analyses. RESULTS: 270 patients were included, 57.8% male and mean age 61.7 (30â88) years. At initial staging, 6.7% of patients were stage I, 21.5% stage II, and 71.8% stage III. Open surgery was performed in 65.2%, with sphincter preservation in 78.1%. Mortality within 30 postoperative days was 0.7%. After 49.4 (0.5â86.1) months of median follow-up, overall and local recurrences were 26.3% and 5.9%. On multivariate analyses, local recurrence was associated with involvement of the mesorectal fascia on restaging MRI (HR = 9.11, p = 0.001) and with pathologic involvement of radial surgical margin (HR = 8.19, p < 0.001). CONCLUSION: Local recurrence of rectal cancer treated with long-course chemoradiation and total mesorectal excision is low and is associated with pathologic involvement of the radial surgical margin and can be predicted on restaging MRI.
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Terapia Neoadyuvante , Recurrencia Local de Neoplasia , Neoplasias del Recto , Humanos , Neoplasias del Recto/terapia , Neoplasias del Recto/patología , Neoplasias del Recto/cirugía , Masculino , Femenino , Persona de Mediana Edad , Estudios Retrospectivos , Anciano , Adulto , Terapia Neoadyuvante/métodos , Pronóstico , Anciano de 80 o más Años , Estadificación de Neoplasias , Factores de Riesgo , Resultado del Tratamiento , Quimioradioterapia , Estimación de Kaplan-Meier , Factores de TiempoRESUMEN
Abstract Prognostic factors for local recurrence in patients with rectal cancer submitted to neoadjuvant chemoradiotherapy and total mesorectal excision. Background: The standard curative treatment for locally advanced rectal cancer of the middle and lower thirds is long-course chemoradiotherapy followed by total mesorectal excision. Purpose: To evaluate the prognostic factors associated with local recurrence in patients with rectal cancer submitted to neoadjuvant chemoradiotherapy and total mesorectal excision. Methods: Retrospective study including patients with rectal cancer T3-4N0M0 or T (any)N + M0 located within 10 cm from the anal border, or patients with T2N0M0 located within 5 cm, treated by long course chemoradio-therapy followed by total mesorectal excision with curative intent. Clinical, demographic, radiologic, surgical, and anatomopathological data were collected. Local recurrence was estimated using the Kaplan-Meier function, and risk was estimated according to each characteristic using univariate and multivariate analyses. Results: 270 patients were included, 57.8% male and mean age 61.7 (30‒88) years. At initial staging, 6.7% of patients were stage I, 21.5% stage II, and 71.8% stage III. Open surgery was performed in 65.2%, with sphincter preservation in 78.1%. Mortality within 30 postoperative days was 0.7%. After 49.4 (0.5‒86.1) months of median follow-up, overall and local recurrences were 26.3% and 5.9%. On multivariate analyses, local recurrence was associated with involvement of the mesorectal fascia on restaging MRI (HR = 9.11, p = 0.001) and with pathologic involvement of radial surgical margin (HR = 8.19, p < 0.001). Conclusion: Local recurrence of rectal cancer treated with long-course chemoradiation and total mesorectal excision is low and is associated with pathologic involvement of the radial surgical margin and can be predicted on restaging MRI.
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BACKGROUND: Watch-and-wait strategy has been increasingly accepted for patients with clinical complete response (cCR) after multimodal treatment for locally advanced rectal adenocarcinoma. Close follow-up is essential to the early detection of local regrowth. It was previously demonstrated that probe-based confocal laser endomicroscopy (pCLE) scoring using the combination of epithelial and vascular features might improve the diagnostic accuracy of cCR. AIM: To validate the pCLE scoring system in the assessment of patients with cCR after neoadjuvant chemoradiotherapy (nCRxt) for advanced rectal adenocarcinoma. METHODS: Digital rectal examination, pelvic magnetic resonance imaging (MRI), and pCLE were performed in 43 patients with cCR, who presented either a scar (N = 33; 76.7%) or a small ulcer with no signs of tumor, and/or biopsy negative for malignancy (N = 10; 23.3%). RESULTS: Twenty-five (58.1%) patients were men, and the mean age was 58.4 years. During the follow-up, 12/43 (27.9%) patients presented local regrowth and underwent salvage surgery. There was an association between pCLE diagnostic scoring and final histological report (for patients who underwent surgical resection) or final diagnosis at the latest follow-up (p = 0.0001), while this association was not observed with MRI (p = 0.49). pCLE sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 66.7%, 93.5%, 80%, 88.9%, and 86%, respectively. MRI sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 66.7%, 48.4%, 66.7%, 78.9%, and 53.5%, respectively. CONCLUSIONS: pCLE scoring system based on epithelial and vascular features improved the diagnosis of sustained cCR and might be recommended during follow-up. pCLE might add some valuable contribution for identifying local regrowth. Trial Registration This protocol was registered at the Clinical Trials (ClinicalTrials.gov identifier NCT02284802).
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Adenocarcinoma , Neoplasias del Recto , Masculino , Humanos , Persona de Mediana Edad , Femenino , Terapia Neoadyuvante , Neoplasias del Recto/diagnóstico por imagen , Neoplasias del Recto/terapia , Terapia Combinada , Adenocarcinoma/diagnóstico por imagen , Adenocarcinoma/terapia , Rayos Láser , Quimioradioterapia , Recurrencia Local de Neoplasia/diagnóstico , Espera Vigilante/métodos , Resultado del TratamientoRESUMEN
OBJECTIVES: Since the outbreak of the novel coronavirus disease 2019 (COVID-19), all health services worldwide underwent profound changes, leading to the suspension of many elective surgeries. This study aimed to evaluate the safety of elective colorectal surgery during the pandemic. METHODS: This was a retrospective, cross-sectional, single-center study. Patients who underwent elective colorectal surgery during the COVID-19 pandemic between March 10 and September 9, 2020, were included. Patient data on sex, age, diagnosis, types of procedures, hospital stay, mortality, and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) preoperative screening tests were recorded. RESULTS: A total of 103 colorectal surgical procedures were planned, and 99 were performed. Four surgeries were postponed due to positive preoperative screening for SARS-CoV-2. Surgical procedures were performed for colorectal cancer (n=90) and inflammatory bowel disease (n=9). Laparoscopy was the approach of choice for 43 patients (43.4%), 53 (53.5%) procedures were open, and 3 (3%) procedures were robotic. Five patients developed COVID-19 in the postoperative period, and three of them died in the intensive care unit (n=3/5, 60% mortality). Two other patients died due to surgical complications unrelated to COVID-19 (n=2/94, 2.1% mortality) (p<0.01). Hospital stay was longer in patients with SARS-CoV-2 infection than in those without (38.4 versushttps://doi.org/10.3 days, respectively, p<0.01). Of the 99 patients who received surgical care during the pandemic, 94 were safely discharged (95%). CONCLUSION: Our study demonstrated that elective colorectal surgical procedures may be safely performed during the pandemic; however, preoperative testing should be performed to reduce in-hospital infection rates, since the mortality rate due to SARS-CoV-2 in this setting is particularly high.
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COVID-19 , Neoplasias Colorrectales , Cirugía Colorrectal , Estudios Transversales , Procedimientos Quirúrgicos Electivos/efectos adversos , Humanos , Pandemias , Estudios Retrospectivos , SARS-CoV-2RESUMEN
OBJECTIVES: Since the outbreak of the novel coronavirus disease 2019 (COVID-19), all health services worldwide underwent profound changes, leading to the suspension of many elective surgeries. This study aimed to evaluate the safety of elective colorectal surgery during the pandemic. METHODS: This was a retrospective, cross-sectional, single-center study. Patients who underwent elective colorectal surgery during the COVID-19 pandemic between March 10 and September 9, 2020, were included. Patient data on sex, age, diagnosis, types of procedures, hospital stay, mortality, and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) preoperative screening tests were recorded. RESULTS: A total of 103 colorectal surgical procedures were planned, and 99 were performed. Four surgeries were postponed due to positive preoperative screening for SARS-CoV-2. Surgical procedures were performed for colorectal cancer (n=90) and inflammatory bowel disease (n=9). Laparoscopy was the approach of choice for 43 patients (43.4%), 53 (53.5%) procedures were open, and 3 (3%) procedures were robotic. Five patients developed COVID-19 in the postoperative period, and three of them died in the intensive care unit (n=3/5, 60% mortality). Two other patients died due to surgical complications unrelated to COVID-19 (n=2/94, 2.1% mortality) (p<0.01). Hospital stay was longer in patients with SARS-CoV-2 infection than in those without (38.4 versushttps://doi.org/10.3 days, respectively, p<0.01). Of the 99 patients who received surgical care during the pandemic, 94 were safely discharged (95%). CONCLUSION: Our study demonstrated that elective colorectal surgical procedures may be safely performed during the pandemic; however, preoperative testing should be performed to reduce in-hospital infection rates, since the mortality rate due to SARS-CoV-2 in this setting is particularly high.
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Humanos , Neoplasias Colorrectales , Cirugía Colorrectal , Infecciones por Coronavirus , Estudios Transversales , Estudios Retrospectivos , Procedimientos Quirúrgicos Electivos/efectos adversos , Pandemias , BetacoronavirusRESUMEN
BACKGROUND: Total mesorectal excision is the standard radical operation after neoadjuvant chemoradiotherapy for patients with middle/low locally advanced rectal cancer. However, it carries significant rates of morbidity, sexual/urinary dysfunction, fecal impairment and permanent stoma. The ability to identify patients with a complete or nearly-complete response could help steer patients to less-invasive surgery or a watch-and-wait strategy. OBJECTIVE: To assess the ability to predict good responders and a favorable prognosis among rectal cancer patients by post-chemoradiation therapy MRI. PATIENTS: Consecutive patients stage T3-4N0M0 or T(any)N+M0 located within 10cm from the anal verge were enrolled. Patients were staged and re-staged 8.8 weeks after the completion of chemoradiation by digital exam, colonoscopy, pelvic-MRI, and thorax and abdominal CT scans. All patients underwent total mesorectal excision with curative intent. RESULTS: Of the total 309 patients, 275 were eligible, and 199 (72.4%) of these were stage III. Restaging-MRI identified 59 (21.4%) T=2N0/TRG1-2. Specimen pathologic evaluation revealed 43 (15.6%) patients with a complete pathologic response. Estimates of the accuracy, sensitivity, specificity, positive predictive value, and negative predictive value of MRIyT=2N0/TRG1-2 for the identification of ypT0N0 were 79.7%, 84.5%, 53.5%, 39%, and 90.7%, respectively. Estimates for the identification of ypN0 were 48.4%, 27.8%, 92%, 88.1%, and 48.4%, respectively. In a multivariate analysis, the only pre-CRT/MRI variables that were associated with an increased risk of lymph node involvement at the specimen were N+ (OR=2.22) and extramural vascular invasion (OR=2.28). MRI yT=2N0/TRG1-2 patients showed improved estimated 5-year disease-free survival, but no difference in estimated 5-year survival. CONCLUSION: Although MRIyT=2N0/TRG1-2 cannot predict all cases of a complete pathologic response, it can effectively predict a low rate of lymph node involvement and a better prognosis in patients who undergo total mesorectal excision.
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Quimioradioterapia , Terapia Neoadyuvante , Neoplasias del Recto , Humanos , Imagen por Resonancia Magnética , Estadificación de Neoplasias , Neoplasias del Recto/tratamiento farmacológico , Neoplasias del Recto/radioterapia , Resultado del TratamientoRESUMEN
OBJECTIVE: to evaluate the incidence, epidemiological characteristics, diagnosis and evolution of patients who returned to the emergency care units of the Albert Einstein Hospital in São Paulo/SP with signs and symptoms suggestive of colonoscopy complications up to 30 days after the procedure. METHODS: we conducted a retrospective, uni-institutional study of patients submitted to colonoscopy in 2014 who returned to the Emergency department (ED) within 30 days after the procedure. RESULTS: 8968 patients underwent colonoscopies, 95 (1.06%) of whom had complaints related to possible complications. Most of the procedures were elective ones. Minor complications (nonspecific abdominal pain/distension) were frequent (0.49%) and most of the patients were discharged after consultation at the ED. Severe complications were less frequent: perforation (0.033%), lower gastrointestinal bleeding (0.044%), and intestinal obstruction (0.044%). ED consultations in less than 24 hours after the procedure was associated with a higher index of normal colonoscopies (p=0.006), more diagnosis of fever (p=0.0003) and dyspeptic syndrome (p=0.043), and less diagnosis of colitis/ileitis (p=0.015). The observation of fever in patients treated at the ED was associated with the diagnosis of polyps at colonoscopy (p=0.030). CONCLUSION: the data corroborate the safety of the colonoscopy exam and points to a reduction in major complications rates.
OBJETIVO: avaliar a incidência, características epidemiológicas, diagnóstico e evolução dos pacientes que retornaram às unidades de pronto atendimento (UPA) do Hospital Albert Einstein em São Paulo/SP com sinais e sintomas sugestivos de complicações até 30 dias após realização de colonoscopia. MÉTODOS: estudo retrospectivo uni-institucional de pacientes submetidos à colonoscopia em 2014 e que retornaram, em até 30 dias após o procedimento, a uma UPA. RESULTADOS: foram realizadas colonoscopias em 8968 pacientes, dos quais 95 (1,06%) tiveram queixa relacionada à possível complicação. A maioria dos procedimentos foi realizada eletivamente. Complicações menores (dor abdominal inespecífica/distensão) foram frequentes (0,49%) e a maioria dos pacientes recebeu alta após consulta na UPA. Complicações graves foram menos frequentes: perfuração (0,033%), hemorragia digestiva baixa (0,044%) e obstrução intestinal (0,044%). A procura à UPA em menos de 24 horas após o procedimento associou-se a maior índice de colonoscopias normais (P=0,006), mais diagnóstico de febre (P=0,0003) e síndrome dispéptica (P=0,043) e menos diagnóstico de colite/ileíte (P=0,015). A presença de febre em pacientes atendidos na UPA associou-se ao diagnóstico de pólipos na colonoscopia (P=0,030). CONCLUSÃO: os dados do presente estudo corroboram as evidências de segurança do exame de colonoscopia e apontam para redução nos índices de complicações mais graves deste exame.
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Colon/lesiones , Colonoscopía/efectos adversos , Hemorragia Gastrointestinal/epidemiología , Perforación Intestinal/epidemiología , Dolor Abdominal/epidemiología , Dolor Abdominal/etiología , Adulto , Anciano , Colonoscopía/estadística & datos numéricos , Servicio de Urgencia en Hospital/estadística & datos numéricos , Femenino , Fiebre/epidemiología , Fiebre/etiología , Hemorragia Gastrointestinal/etiología , Humanos , Incidencia , Perforación Intestinal/etiología , Masculino , Persona de Mediana Edad , Readmisión del Paciente/estadística & datos numéricos , Estudios RetrospectivosRESUMEN
RESUMO Objetivo: avaliar a incidência, características epidemiológicas, diagnóstico e evolução dos pacientes que retornaram às unidades de pronto atendimento (UPA) do Hospital Albert Einstein em São Paulo/SP com sinais e sintomas sugestivos de complicações até 30 dias após realização de colonoscopia. Métodos: estudo retrospectivo uni-institucional de pacientes submetidos à colonoscopia em 2014 e que retornaram, em até 30 dias após o procedimento, a uma UPA. Resultados: foram realizadas colonoscopias em 8968 pacientes, dos quais 95 (1,06%) tiveram queixa relacionada à possível complicação. A maioria dos procedimentos foi realizada eletivamente. Complicações menores (dor abdominal inespecífica/distensão) foram frequentes (0,49%) e a maioria dos pacientes recebeu alta após consulta na UPA. Complicações graves foram menos frequentes: perfuração (0,033%), hemorragia digestiva baixa (0,044%) e obstrução intestinal (0,044%). A procura à UPA em menos de 24 horas após o procedimento associou-se a maior índice de colonoscopias normais (P=0,006), mais diagnóstico de febre (P=0,0003) e síndrome dispéptica (P=0,043) e menos diagnóstico de colite/ileíte (P=0,015). A presença de febre em pacientes atendidos na UPA associou-se ao diagnóstico de pólipos na colonoscopia (P=0,030). Conclusão: os dados do presente estudo corroboram as evidências de segurança do exame de colonoscopia e apontam para redução nos índices de complicações mais graves deste exame.
ABSTRACT Objective: to evaluate the incidence, epidemiological characteristics, diagnosis and evolution of patients who returned to the emergency care units of the Albert Einstein Hospital in São Paulo/SP with signs and symptoms suggestive of colonoscopy complications up to 30 days after the procedure. Methods: we conducted a retrospective, uni-institutional study of patients submitted to colonoscopy in 2014 who returned to the Emergency department (ED) within 30 days after the procedure. Results: 8968 patients underwent colonoscopies, 95 (1.06%) of whom had complaints related to possible complications. Most of the procedures were elective ones. Minor complications (nonspecific abdominal pain/distension) were frequent (0.49%) and most of the patients were discharged after consultation at the ED. Severe complications were less frequent: perforation (0.033%), lower gastrointestinal bleeding (0.044%), and intestinal obstruction (0.044%). ED consultations in less than 24 hours after the procedure was associated with a higher index of normal colonoscopies (p=0.006), more diagnosis of fever (p=0.0003) and dyspeptic syndrome (p=0.043), and less diagnosis of colitis/ileitis (p=0.015). The observation of fever in patients treated at the ED was associated with the diagnosis of polyps at colonoscopy (p=0.030). Conclusion: the data corroborate the safety of the colonoscopy exam and points to a reduction in major complications rates.
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Humanos , Masculino , Femenino , Adulto , Anciano , Colonoscopía/efectos adversos , Colon/lesiones , Hemorragia Gastrointestinal/epidemiología , Perforación Intestinal/epidemiología , Readmisión del Paciente/estadística & datos numéricos , Dolor Abdominal/etiología , Dolor Abdominal/epidemiología , Incidencia , Estudios Retrospectivos , Colonoscopía/estadística & datos numéricos , Servicio de Urgencia en Hospital/estadística & datos numéricos , Fiebre/etiología , Fiebre/epidemiología , Hemorragia Gastrointestinal/etiología , Perforación Intestinal/etiología , Persona de Mediana EdadRESUMEN
OBJECTIVES:: This study sought to determine the clinical and pathological factors associated with perioperative morbidity, mortality and oncological outcomes after multivisceral en bloc resection in patients with colorectal cancer. METHODS:: Between January 2009 and February 2014, 105 patients with primary colorectal cancer selected for multivisceral resection were identified from a prospective database. Clinical and pathological factors, perioperative morbidity and mortality and outcomes were obtained from medical records. Estimated local recurrence and overall survival were compared using the log-rank method, and Cox regression analysis was used to determine the independence of the studied parameters. ClinicalTrials.gov: NCT02859155. RESULTS:: The median age of the patients was 60 (range 23-86) years, 66.7% were female, 80% of tumors were located in the rectum, 11.4% had stage-IV disease, and 54.3% received neoadjuvant chemoradiotherapy. The organs most frequently resected were ovaries and annexes (37%). Additionally, 30.5% of patients received abdominoperineal resection. Invasion of other organs was confirmed histologically in 53.5% of patients, and R0 resection was obtained in 72% of patients. The overall morbidity rate of patients in this study was 37.1%. Ureter resection and intraoperative blood transfusion were independently associated with an increased number of complications. The 30-day postoperative mortality rate was 1.9%. After 27 (range 5-57) months of follow-up, the mortality and local recurrence rates were 23% and 15%, respectively. Positive margins were associated with a higher recurrence rate. Positive margins, lymph node involvement, stage III/IV disease, and stage IV disease alone were associated with lower overall survival rates. On multivariate analysis, the only factor associated with reduced survival was lymph node involvement. CONCLUSIONS:: Multivisceral en bloc resection for primary colorectal cancer can be performed with acceptable rates of morbidity and mortality and may lead to favorable oncological outcomes.
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Neoplasias Colorrectales/mortalidad , Neoplasias Colorrectales/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Neoplasias Colorrectales/patología , Femenino , Humanos , Complicaciones Intraoperatorias , Estimación de Kaplan-Meier , Masculino , Persona de Mediana Edad , Morbilidad , Terapia Neoadyuvante , Invasividad Neoplásica , Recurrencia Local de Neoplasia , Estadificación de Neoplasias , Complicaciones Posoperatorias , Pronóstico , Estudios Prospectivos , Factores de Riesgo , Factores de Tiempo , Vísceras/patología , Vísceras/cirugía , Adulto JovenRESUMEN
OBJECTIVES: This study sought to determine the clinical and pathological factors associated with perioperative morbidity, mortality and oncological outcomes after multivisceral en bloc resection in patients with colorectal cancer. METHODS: Between January 2009 and February 2014, 105 patients with primary colorectal cancer selected for multivisceral resection were identified from a prospective database. Clinical and pathological factors, perioperative morbidity and mortality and outcomes were obtained from medical records. Estimated local recurrence and overall survival were compared using the log-rank method, and Cox regression analysis was used to determine the independence of the studied parameters. ClinicalTrials.gov: NCT02859155. RESULTS: The median age of the patients was 60 (range 23-86) years, 66.7% were female, 80% of tumors were located in the rectum, 11.4% had stage-IV disease, and 54.3% received neoadjuvant chemoradiotherapy. The organs most frequently resected were ovaries and annexes (37%). Additionally, 30.5% of patients received abdominoperineal resection. Invasion of other organs was confirmed histologically in 53.5% of patients, and R0 resection was obtained in 72% of patients. The overall morbidity rate of patients in this study was 37.1%. Ureter resection and intraoperative blood transfusion were independently associated with an increased number of complications. The 30-day postoperative mortality rate was 1.9%. After 27 (range 5-57) months of follow-up, the mortality and local recurrence rates were 23% and 15%, respectively. Positive margins were associated with a higher recurrence rate. Positive margins, lymph node involvement, stage III/IV disease, and stage IV disease alone were associated with lower overall survival rates. On multivariate analysis, the only factor associated with reduced survival was lymph node involvement. CONCLUSIONS: Multivisceral en bloc resection for primary colorectal cancer can be performed with acceptable rates of morbidity and mortality and may lead to favorable oncological outcomes.
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Humanos , Masculino , Femenino , Adulto , Persona de Mediana Edad , Anciano , Anciano de 80 o más Años , Adulto Joven , Neoplasias Colorrectales/mortalidad , Neoplasias Colorrectales/cirugía , Neoplasias Colorrectales/patología , Complicaciones Intraoperatorias , Estimación de Kaplan-Meier , Morbilidad , Terapia Neoadyuvante , Invasividad Neoplásica , Recurrencia Local de Neoplasia , Estadificación de Neoplasias , Complicaciones Posoperatorias , Pronóstico , Estudios Prospectivos , Factores de Riesgo , Factores de Tiempo , Vísceras/patología , Vísceras/cirugíaRESUMEN
BACKGROUND: Chemoradiotherapy has the potential to downsize and downstage tumors before surgery, decrease locoregional recurrence, and induce a complete sterilization of tumor cells for middle and low locally advanced rectal cancer. A watch-and-wait tactic has been proposed for patients with clinical complete response. OBJECTIVE: The purpose of this study was to verify our ability to identify complete clinical response in patients with rectal cancer based on clinical and radiologic criteria. DESIGN: This was a prospective study. SETTINGS: The study was conducted at a single institution, in the setting of a watch-and-wait randomized trial. PATIENTS: Consecutive patients with stage T3 to T4N0M0 or T(any)N+M0 cancer located within 10 cm from anal verge or T2N0 within 7 cm from anal verge were included in the study. Patients were staged and restaged 8 weeks after completion of chemoradiation (5-fluorouracil, 5040 cGy) by digital examination, colonoscopy, pelvic MRI, and thorax and abdominal CT scans. MAIN OUTCOME MEASURES: Clinical and radiologic judgments of tumor response were compared with pathologic response of patients treated by total mesorectal excision or clinical follow-up of patients selected for nonoperative treatment. RESULTS: A total of 118 patients were treated. Six patients were considered clinic complete responders (2 randomly assigned for surgery (1 ypT0N0 and 1 ypT2N0) and 4 patients randomly assigned for observation (3 sustained clinic complete response and 1 had tumor regrowth)). The 112 clinic incomplete responders underwent total mesorectal excision, and 18 revealed pathologic complete response. These 18 patients were not considered complete responders at restaging because they presented at least 1 of the following conditions: mucosal ulceration and/or deformity and/or substenosis of rectal lumen at digital rectal examination and colonoscopy (n = 16), ymrT1 to T4 (n = 16), ymrN+ (n = 2), involvement of circumferential resection margin on MRI (n = 3), extramural vascular invasion on MRI (n = 4), MRI tumor response grade 2 to 4 (n = 15), and pelvic side wall lymph node involvement on MRI (n = 1). Sensitivity for identification of ypT0N0 or sustained clinic complete response was 18.2%. LIMITATIONS: This study has a short follow-up and small sample size. Radiologists who reviewed the restaging examination were not blinded to the pretreatment stage. Only 1 radiologist read the images of each patient. CONCLUSIONS: Evaluation of clinic complete response according to current adopted criteria has low sensitivity because pathologic complete response more frequently presented as clinic incomplete response (see Video, Supplemental Digital Content 1, http://links.lww.com/DCR/A221).
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Adenocarcinoma/terapia , Antimetabolitos Antineoplásicos/uso terapéutico , Quimioradioterapia , Fluorouracilo/uso terapéutico , Neoplasias del Recto/terapia , Recto/cirugía , Adenocarcinoma/patología , Adulto , Anciano , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Terapia Neoadyuvante , Estadificación de Neoplasias , Estudios Prospectivos , Neoplasias del Recto/patología , Inducción de Remisión , Espera VigilanteRESUMEN
BACKGROUND: Neoadjuvant chemoradiation (CRT) therapy may result in significant tumor regression in patients with rectal cancer. Patients who develop complete tumor regression have been managed by treatment strategies that are alternatives to standard total mesorectal excision. Therefore, assessment of tumor response with positron emission tomography/computed tomography (PET/CT) after neoadjuvant treatment may offer relevant information for the selection of patients to receive alternative treatment strategies. METHODS: Patients with clinical T2 (cT2) through cT4NxM0 rectal adenocarcinoma were included prospectively. Neoadjuvant therapy consisted of 54 grays of radiation and 5-fluorouracil-based chemotherapy. Baseline PET/CT studies were obtained before CRT followed by PET/CT studies at 6 weeks and 12 weeks after the completion of CRT. Clinical assessment was performed at 12 weeks after CRT completion. PET/CT results were compared with clinical and pathologic data. RESULTS: In total, 99 patients were included in the study. Twenty-three patients were complete responders (16 had a complete clinical response, and 7 had a complete pathologic response). The PET/CT response evaluation at 12 weeks indicated that 18 patients had a complete response, and 81 patients had an incomplete response. There were 5 false-negative and 10 false-positive PET/CT results. PET/CT for the detection of residual cancer had 93% sensitivity, 53% specificity, a 73% negative predictive value, an 87% positive predictive value, and 85% accuracy. Clinical assessment alone resulted in an accuracy of 91%. PET/CT information may have detected misdiagnoses made by clinical assessment alone, improving overall accuracy to 96%. CONCLUSIONS: Assessment of tumor response at 12 weeks after CRT completion with PET/CT imaging may provide a useful additional tool with good overall accuracy for the selection of patients who may avoid unnecessary radical resection after achieving a complete clinical response. Cancer 2012;3501-3511. © 2011 American Cancer Society.
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Imagen Multimodal , Tomografía de Emisión de Positrones , Neoplasias del Recto/diagnóstico por imagen , Neoplasias del Recto/terapia , Tomografía Computarizada por Rayos X , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Quimioradioterapia/métodos , Quimioterapia Adyuvante , Terapia Combinada , Femenino , Humanos , Masculino , Persona de Mediana Edad , Terapia Neoadyuvante/métodos , Neoplasias del Recto/mortalidad , Resultado del TratamientoRESUMEN
OBJECTIVES: To evaluate the incidence surgical results and prognostic factors of locally advanced colorectal cancer. METHODS: Cohort study including 679 colorectal cancer patients treated from 1997 to 2007. Clinical, surgical and histological data were analyzed. RESULTS: Ninety patients (females 61%; median age 59 years) were treated for locally advanced carcinomas (13.2%), either in the colon (66%) or rectum (34%). Extended resections most commonly involved the small bowel (19.8%), bladder (16.4%), uterus (12.9%) and ovaries (11.2%). Postoperative morbidity and mortality occurred in 23 (25.6%) and 3 (3.3%) patients, respectively. Survival and recurrence analysis among 76 R0 (84.4%) procedures revealed a 60% 5-year survival and 34% local recurrence rates. Survival curves demonstrated reduced rates for rectal location (45% vs 65%), tumor depth (50% for T4 vs 75% for T3), vascular/ lymphatic/perineural invasion (35% vs 80%) and lymph node metastasis (35% vs 80%). CONCLUSIONS: Locally advanced carcinomas were found in 13.2% of patients. Survival rates were negatively affected by rectal location and adverse histological features. Number of involved organs and neoplastic adhesions did not influenced chances of survival. A radical R0 extended resection was achieved in a high proportion of cases, resulting in a 60% cancer-free survival under acceptable operative risks.
Asunto(s)
Neoplasias del Colon/cirugía , Neoplasias del Recto/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Neoplasias del Colon/mortalidad , Neoplasias del Colon/patología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Invasividad Neoplásica , Recurrencia Local de Neoplasia , Estadificación de Neoplasias , Complicaciones Posoperatorias , Pronóstico , Estudios Prospectivos , Neoplasias del Recto/mortalidad , Neoplasias del Recto/patología , Análisis de Supervivencia , Adulto JovenRESUMEN
OBJECTIVES: To evaluate the incidence surgical results and prognostic factors of locally advanced colorectal cancer. METHODS: Cohort study including 679 colorectal cancer patients treated from 1997 to 2007. Clinical, surgical and histological data were analyzed. RESULTS: Ninety patients (females 61 percent; median age 59 years) were treated for locally advanced carcinomas (13.2 percent), either in the colon (66 percent) or rectum (34 percent). Extended resections most commonly involved the small bowel (19.8 percent), bladder (16.4 percent), uterus (12.9 percent) and ovaries (11.2 percent). Postoperative morbidity and mortality occurred in 23 (25.6 percent) and 3 (3.3 percent) patients, respectively. Survival and recurrence analysis among 76 R0 (84.4 percent) procedures revealed a 60 percent 5-year survival and 34 percent local recurrence rates. Survival curves demonstrated reduced rates for rectal location (45 percent vs 65 percent), tumor depth (50 percent for T4 vs 75 percent for T3), vascular/ lymphatic/perineural invasion (35 percent vs 80 percent) and lymph node metastasis (35 percent vs 80 percent). CONCLUSIONS: Locally advanced carcinomas were found in 13.2 percent of patients. Survival rates were negatively affected by rectal location and adverse histological features. Number of involved organs and neoplastic adhesions did not influenced chances of survival. A radical R0 extended resection was achieved in a high proportion of cases, resulting in a 60 percent cancer-free survival under acceptable operative risks.
OBJETIVOS: Avaliar a incidência, os resultados operatórios e os fatores prognósticos relacionados aos tumores colorretais localmente avançados. MÉTODOS: A população deste estudo foi constituída por 679 pacientes com câncer colorretal tratados entre 1997 e 2007. Dados clínicos, cirúrgicos e histológicos foram analisados. RESULTADOS: Noventa pacientes (mulheres 61 por cento; idade media 59 anos) foram tratados por câncer colorretal localmente avançados (13.2 por cento) no cólon (66 por cento) ou no reto (34 por cento). As ressecções alargadas mais frequentemente envolveram o intestino delgado (19.8 por cento), bexiga (16.4 por cento), útero (12.9 por cento) e ovários (11.2 por cento). Houve morbidade e mortalidade pós-operatórias em 23 (25.6 por cento) e 3 (3.3 por cento) pacientes, respectivamente. Análise de sobrevida e recidiva entre 76 ressecções R0 (84.4 por cento) mostraram sobrevida de 5 anos em 60 por cento e índice de recidiva local em 34 por cento. As curvas de sobrevida demonstraram índices menores para localização retal do tumor (45 por cento vs 65 por cento), grau de penetração (50 por cento para T4 vs 75 por cento para T3), invasão vascular, linfática ou perineural (35 por cento vs 80 por cento) e metástases linfonodais (35 por cento vs 80 por cento). CONCLUSÕES: Carcinomas localmente avançados foram diagnosticados em 13.2 por cento dos pacientes. Os índices de sobrevida foram negativamente afetados pela localização retal e fatores histológicos adversos. O número de órgãos envolvidos e aderências neoplásicas não influenciaram as chances de cura. Foi possível realizar ressecções alargadas R0 em grande proporção de casos, resultando em sobrevida livre de doença em 60 por cento dos doentes, em condições de risco cirúrgico aceitável.
Asunto(s)
Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven , Neoplasias del Colon/cirugía , Neoplasias del Recto/cirugía , Neoplasias del Colon/mortalidad , Neoplasias del Colon/patología , Invasividad Neoplásica , Recurrencia Local de Neoplasia , Estadificación de Neoplasias , Complicaciones Posoperatorias , Pronóstico , Estudios Prospectivos , Neoplasias del Recto/mortalidad , Neoplasias del Recto/patología , Análisis de SupervivenciaRESUMEN
BACKGROUND: Familial Adenomatous Polyposis (FAP) is a hereditary disorder with multiple colorectal polyps that exhibit an almost inevitable risk of colorectal cancer (CRC) in untreated patients. GOALS: To evaluate clinical features related to CRC risk at diagnosis. MATERIAL AND METHODS: Charts from 88 patients were reviewed to collect information regarding age, family history, symptoms, polyposis severity and association with CRC. RESULTS: 41 men (46.6%) and 47 women (53.4%) were assisted. CRC was detected in 53 patients (60.2%), with a frequency of 9.1% under 20 years, 58% between 21-40 and 85% over 41 years of age. Average age of patients without CRC was lower at treatment (29.5 vs. 40.0 years; p=0.001). Family history was reported by 58 patients (65.9%), whose average age did not differ from those who didn't report it (33.4 vs. 34.4; p=0.17). Asymptomatic patients comprised 10.2% of the total; in this group, CRC incidence was much lower when compared to those presenting symptoms (1.1% vs. 65.8%; p=0.001). Patients without CRC presented a shorter length of symptoms (15.2 vs. 26.4 months; p=0.03) and less frequent weight loss (11.4% vs. 33.9%; p=0.01). At colonoscopy, polyposis was classified as attenuated in 12 patients (14.3%), who presented greater average age (48.2 vs. 33.3 years; p=0.02) and equal CRC incidence (58.3% vs. 58.3%; p=0.6) when compared to those with classic polyposis. CONCLUSIONS: The risk of CRC in FAP patients 1) increases significantly after the second decade; 2) is associated with higher age, weight loss, presence and duration of simptomatology; 3) is similar in patients with attenuated or classic phenotype.
Asunto(s)
Poliposis Adenomatosa del Colon/complicaciones , Poliposis Adenomatosa del Colon/diagnóstico , Neoplasias Colorrectales/complicaciones , Neoplasias Colorrectales/diagnóstico , Poliposis Adenomatosa del Colon/epidemiología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Neoplasias Colorrectales/epidemiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Retrospectivos , Factores de Riesgo , Adulto JovenRESUMEN
BACKGROUND: Familial adenomatous polyposis is a genetic syndrome associated with an increased risk of colorectal cancer (CRC) and different extracolonic manifestations. GOALS: The goal of this study is to evaluate the frequency of death causes. MATERIAL AND METHODS: Charts from 97 patients treated from 1977 to 2008 were reviewed. Retrieved data and family information allowed us to classify causes of death in those related to CCR to other malignancies or other causes. RESULTS: There were analyzed data from 46 men (47.4%) and 51 women (52.6%) with an average age of 35.1 years (14 to 82). At diagnosis, 57 patients (58.7%) already had CRC-associated polyposis. There were performed 93 colectomies, one internal diversion, and one partial resection. Two patients were not operated on. Results from 19 deceased patients (19.5%) were analyzed. CRC, other tumors (desmoid tumors, lymphoma, and gastric cancer), and other causes (complication of duodenal cancer surgery, complication after ileorectal anastomosis (IRA), and coronary disease) were responsible for 12 (63.1%), four (21.1%), and three (15.8%) of all deaths, respectively. Death from CRC occurred in the context of either systemic, rectal, or pouch recurrence. Desmoid disease was the second cause of death (10.5% of all causes), leading to a fatal outcome 22% of all patients who developed DT during the study period. Upper digestive carcinomas were responsible for other two death cases. CONCLUSIONS: (1) CRC is still the most prevalent cause of death; (2) even after curative resections, CRC can cause death through rectal or pouch malignization; (3) long-term survival was also strongly related to the development of extracolonic neoplasia, especially desmoid tumors and gastroduodenal carcinoma; (4) our results raise the need for local improvement in familiar screening and help us to define follow-up strategies and patient-information standards.
Asunto(s)
Poliposis Adenomatosa del Colon/mortalidad , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Causas de Muerte , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Adulto JovenRESUMEN
Context: Controversy regarding the best operative choice for familial adenomatous polyposis lays between the morbidity of restorative proctocolectomy and the supposed mortality due to rectal cancer after ileorectal anastomosis. OBJECTIVES: To evaluate operative complications and oncological outcome after ileorectal anastomosis and restorative proctocolectomy. Methods: Charts from patients treated between 1977 and 2006 were retrospectively analyzed. Clinical and endoscopic data, results of treatment, pathological reports and information regarding early and late outcome were recorded. Results: Eighty-eight patients - 41 men (46.6 percent) and 47 women (53.4 percent) - were assisted. At diagnosis, 53 patients (60.2 percent) already had associated colorectal cancer. Operative complications occurred in 25 patients (29.0 percent), being 17 (19.7 percent) early and 8 (9.3 percent) late complications. There were more complications after restorative proctocolectomy (48.1 percent) compared to proctocolectomy with ileostomy (26.6 percent) and ileorectal anastomosis (19.0 percent) (P = 0,03). There was no operative mortality. During the follow-up of 36 ileorectal anastomosis, cancer developed in the rectal cuff in six patients (16,6 percent). Cumulative cancer risk after ileorectal anastomosis was 17.2 percent at 5 years, 24.1 percent at 10 years and 43.1 percent at 15 years of follow-up. Age-dependent cumulative risk started at 30 years (4.3 percent), went to 9.6 percent at 40 years, 20.9 percent at 40 years and 52 percent at 60 years. Among the 26 patients followed after restorative proctocolectomy, it was found cancer in the ileal pouch in 1 (3.8 percent). Conclusions: 1. Operative complications occurred in about one third of the patients, being more frequently after the confection of ileal reservoir; 2. greater age and previous colonic carcinoma were associated with the development of rectal cancer after ileorectal anastomosis; 3. patients treated...
Contexto: As controvérsias quanto a melhor forma de tratamento da polipose adenomatosa familiar confrontam a morbidade da proctocolectomia restauradora contra a suposta mortalidade decorrente de câncer retal após íleo-reto anastomose. OBJETIVOS: Avaliar as complicações operatórias e a evolução oncológica dos pacientes submetidos a íleo-reto anastomose ou proctocolectomia restauradora. Métodos: Analisaram-se os dados dos doentes tratados entre 1977 e 2006, procedendo ao levantamento de dados clínicos gerais, endoscópicos, resultados do tratamento cirúrgico, dados anatomopatológicos e informações sobre a evolução precoce e tardia dos pacientes. Resultados: Foram tratados 88 pacientes, sendo 41 homens (46,6 por cento) e 47 mulheres (53,4 por cento). Por ocasião do diagnóstico, 53 pacientes (60,2 por cento) já tinham câncer colorretal associado à polipose. Registraram-se complicações operatórias em 25 doentes (29,0 por cento) dentre os 86 operados, sendo 17 (19,7 por cento) precoces e 8 (9,3 por cento) tardias. Houve mais complicações após proctocolectomia restauradora (48,1 por cento) em comparação às proctocolectomias com ileostomia (26,6 por cento) e íleo-reto anastomose (19,0 por cento) (P = 0,03). Não houve mortalidade operatória. O risco cumulativo de câncer retal após íleo-reto anastomose foi de 17,2 por cento após 5 anos, 24,1 por cento após 10 anos e 43,1 por cento após 15 anos de seguimento pós-operatório. Já o risco cumulativo idade-dependente começou a existir a partir de 30 anos (4,3 por cento), passando para 9,6 por cento aos 40 anos, 20,9 por cento aos 40 anos e 52 por cento aos 60 anos. Entre os pacientes submetidos a bolsa ileal com seguimento (26), apenas 1 doente (3,8 por cento) desenvolveu câncer na bolsa ileal. Conclusões: 1. Ocorreram complicações operatórias em cerca de 1/3 dos pacientes, sendo mais frequentes após a confecção de bolsa ileal; 2. idade maior, tempo de seguimento e câncer colônico prévio se associaram...
Asunto(s)
Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven , Poliposis Adenomatosa del Colon/cirugía , Anastomosis Quirúrgica/efectos adversos , Íleon/cirugía , Proctocolectomía Restauradora/efectos adversos , Neoplasias del Recto/etiología , Recto/cirugía , Anastomosis Quirúrgica/métodos , Estudios de Seguimiento , Factores de Riesgo , Factores de Tiempo , Adulto JovenRESUMEN
CONTEXT: Controversy regarding the best operative choice for familial adenomatous polyposis lays between the morbidity of restorative proctocolectomy and the supposed mortality due to rectal cancer after ileorectal anastomosis. OBJECTIVES: To evaluate operative complications and oncological outcome after ileorectal anastomosis and restorative proctocolectomy. METHODS: Charts from patients treated between 1977 and 2006 were retrospectively analyzed. Clinical and endoscopic data, results of treatment, pathological reports and information regarding early and late outcome were recorded. RESULTS: Eighty-eight patients - 41 men (46.6%) and 47 women (53.4%) - were assisted. At diagnosis, 53 patients (60.2%) already had associated colorectal cancer. Operative complications occurred in 25 patients (29.0 %), being 17 (19.7%) early and 8 (9.3%) late complications. There were more complications after restorative proctocolectomy (48.1%) compared to proctocolectomy with ileostomy (26.6%) and ileorectal anastomosis (19.0%) (P = 0,03). There was no operative mortality. During the follow-up of 36 ileorectal anastomosis, cancer developed in the rectal cuff in six patients (16,6%). Cumulative cancer risk after ileorectal anastomosis was 17.2% at 5 years, 24.1% at 10 years and 43.1% at 15 years of follow-up. Age-dependent cumulative risk started at 30 years (4.3%), went to 9.6% at 40 years, 20.9% at 40 years and 52% at 60 years. Among the 26 patients followed after restorative proctocolectomy, it was found cancer in the ileal pouch in 1 (3.8%). CONCLUSIONS: 1. Operative complications occurred in about one third of the patients, being more frequently after the confection of ileal reservoir; 2. greater age and previous colonic carcinoma were associated with the development of rectal cancer after ileorectal anastomosis; 3. patients treated by restorative proctocolectomy are not free from the risk of pouch degeneration; 4. the disease complexity and the various risk factors (clinical, endoscopic, genetic) indicate that the best choice for operative treatment should be based on individual features discussed by a specialist; 5. all patients require continuous and long-term surveillance during postoperative follow-up.
Asunto(s)
Poliposis Adenomatosa del Colon/cirugía , Anastomosis Quirúrgica/efectos adversos , Íleon/cirugía , Proctocolectomía Restauradora/efectos adversos , Neoplasias del Recto/etiología , Recto/cirugía , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Anastomosis Quirúrgica/métodos , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Factores de Riesgo , Factores de Tiempo , Adulto JovenRESUMEN
BACKGROUND: Familial adenomatous polyposis (FAP) is a genetic disease characterized by multiple adenomatous colorectal polyps and different extracolonic manifestations (ECM). The present work is aimed to analyze the outcome after surgical treatment regarding complications and cancer recurrence. METHODS: Charts from patients treated between 1977 and 2006 were retrospectively analyzed. Clinical and endoscopic data, results of treatment, pathological reports and information about recurrence were collected. RESULTS: Eighty-eight patients (41 men [46.6%] and 47 women [53.4%]) were assisted. At diagnosis, associated colorectal cancer (CRC) was detected in 53 patients (60.2%), whose average age was higher than those without CRC (40.0 vs. 29.5 years). At colonoscopy, polyposis was classified as attenuated in 12 patients (14.3%). Surgical treatment consisted in total proctocolectomy with ileostomy (PCI, 15 [17.4%]), restorative proctocolectomy (RPC, 27 [31.4%]), total colectomy with ileal-rectum anastomosis (IRA, 42 [48.8%]), palliative segmental resection (1 [1.2%]) and internal bypass (1 [1.2%]). Two patients were not operated on due to religious reasons and advanced disease. Complications occurred in 25 patients (29.0%), more commonly after RPC (48.1%). There was no operative mortality. Local or distant metastases were detected in six (11.3%) patients with CRC treated to cure. During the follow-up of 36 IRA, cancer developed in the rectal cuff in six patients (16.6%), whose average age was higher than in patients without rectal recurrence (45.8 vs. 36.6 years). Five of them have had colonic cancer in the resected specimen. Among the 26 patients followed after RPC, cancer in the ileal pouch developed in 1 (3.8%). CONCLUSIONS: (1) Within the present series, FAP patients presented a high incidence of associated CRC and diagnosis was generally established after the third decade of life; (2) operative complications occurred in about one third of the patients, being more frequent after the confection of an ileal reservoir; (3) rectal cancer after IRA was detected in 16.6% of patients and it was associated with greater age and previous colonic carcinoma; (4) both continuous and long-term surveillance of the rectal stump and ileal pouch are necessary during follow-up.
Asunto(s)
Poliposis Adenomatosa del Colon/cirugía , Reservorios Cólicos/patología , Neoplasias del Íleon/patología , Íleon/cirugía , Proctocolectomía Restauradora/métodos , Neoplasias del Recto/patología , Recto/cirugía , Poliposis Adenomatosa del Colon/diagnóstico , Poliposis Adenomatosa del Colon/mortalidad , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Anastomosis Quirúrgica/métodos , Brasil , Niño , Colonoscopía , Femenino , Estudios de Seguimiento , Humanos , Neoplasias del Íleon/epidemiología , Íleon/patología , Incidencia , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia , Neoplasias del Recto/epidemiología , Recto/patología , Estudios Retrospectivos , Factores de Riesgo , Tasa de Supervivencia , Factores de Tiempo , Adulto JovenRESUMEN
O desenvolvimento de técnicas minimamente invasivas é um dos mais importantes avanços da cirurgia colorretal. A assistência robótica integra o arsenal de técnicas em cirurgia minimamente invasiva, e vem sendo aplicado em cirurgia colorretal por um restrito grupo de cirurgiões em alguns centros ao redor do mundo com resultados iniciais que merecem atenção. O objetivo do presente estudo é analisar os resultados do emprego da assistência robótica em videocirurgia colorretal. Dentre as vantagens associadas ao emprego de robôs em videocirurgia colorretal, figuram o incremento na precisão dos movimentos e a visão tridimensional. A experiência clínica é ainda pequena, e advém de uma série de casos e estudos comparativos com a videocirurgia colorretal sem assistência robótica com ainda pequeno número de casos. A dissecção pélvica com incremento da preservação autonômica parece ser a maior vantagem associada à assistência robótica em videocirurgia colorretal. Somente através do treinamento de um número mais representativo de cirurgiões colorretais, bem como com a expansão da experiência clínica será possível prever com maior precisão o papel da assistência robótica em videocirurgia colorretal.
The development of minimally invasive surgical techniques represents an important aspect of modern surgical research. Robot-assisted minimally invasive colorectal surgery represents a way of assisting laparoscopic colorectal procedures. Robotic technology overcomes some of these limitations by successfully providing intuitive motion and enhanced precision and accuracy, in an environment that is much more ergonomic. A restrict number of surgeons in specialized centers around the world have been applying robotics. In this review, current evidence about different technologies and its place in colorectal surgery is evaluated. The feasibility of performing robot-assisted colorectal operations has been demonstrated though case series and small case-controlled trials. The potential for enhancing autonomic nerve preservation during proctectomy may be the most remarkable advantage associated to robotic assistance during laparoscopic colorectal surgery. Colorectal surgeons should seize the opportunity to begin to use surgical robotic systems. Only through widespread surgeon training and increasing clinical experience with these systems, further technological developments, and continuous research, robotic technology will be routinely incorporated into surgical procedures on the colon and rectum.