WEIGHT REGAIN AND THE METABOLIC PROFILE OF WOMEN IN THE POSTOPERATIVE PERIOD OF BARIATRIC SURGERY: A MULTIVARIATE ANALYSIS.

BACKGROUND: Weight regain in the postoperative period after bariatric surgery is directly related to the relapse of preoperative comorbidities and a negative impact on the patients' biochemical profile. AIMS: To assess the metabolic impact of weight regain on preoperative comorbidities and on patients' biochemical profiles, in order to show the impact of the complications on the metabolic outcomes of bariatric surgery. METHODS: A retrospective study was carried out with 75 women in the late postoperative period of bariatric surgery who presented pathological weight regain (≥20% of the maximum weight loss). Data of interest consisted of glycemic, lipid, and inflammatory profile measurements at three different moments of evaluation: preoperative period, at the weight nadir (minimum weight), and after weight regain. A multivariate analysis was performed. RESULTS: The mean age was 46.39±12.09 years. Preoperative body mass index was 40.10±4.11 kg/m2. There was an overall increase of 3.36 points in the mean body mass index between the nadir and after regain: from 26.30±3.9 kg/m2 to 29.66±4.66 kg/m2. The mean time to reach the nadir was 18±7.6 months, with an average percentage of excess weight loss of 91.08±11.8%. The median time for pathological weight regain was 48 months, and the mean regain amongst the sample was 8.85±5.65 kg. There was a significant correlation between pathological weight regain and levels of insulin (r=0.351; p<0.011), C-peptide (r=0.303; p<0.011), C-reactive protein (r=0.402; p<0.001), and vitamin D (r=-0.435; p<0.001), the last two being the most influenced by the percentage of weight regained. CONCLUSIONS: The pathological weight regain in the postoperative period of bariatric surgery results in losses in the patients' metabolic and inflammatory profiles. However, the biochemical benefits are sustained up to the preoperative levels of the parameters analyzed.

Long-term evaluation of patients with BMI = 50kg/m2 who underwent Bariatric Surgery.

PURPOSE: to determine the risks and benefits of bariatric surgery in patients with super obesity (SO) in comparison with obesity grades II and III. METHODS: retrospective cohort that included a study group of 178 patients with SO and a control group of 181 patients with BMI 35-49.9Kg/m2. The groups were formed in a 1:1 nearest neighbor matching. The main variables were pre- and postoperative BMI and comorbidities, occurrence of severe postoperative complications, bowel obstruction, marginal ulcer, fistulae and 30-day death, besides the necessity of emergency room (ER) admission and abdominal computed tomography (CT) scans in the postoperative period due to acute abdomen. RESULTS: the study group comprised 74.0% of women while the control group had 56.7%. The mean follow-up time was similar between both groups (5.48 x 6.09 years, p=0.216). There was no statistically significant difference on the prevalence of hypertension and T2D between the groups according to the surgical technique. All deaths occurred in the Study group (BMI = 50kg/m2) who underwent RYGB. There was no difference between the groups regarding the occurrence of severe complications. Data on ER admissions and the need for abdominal CT to investigate postoperative abdominal pain did not show statistically significant difference between the groups. CONCLUSION: despite the high risk related to bariatric surgery in patients with SO, the benefits related to the remission of comorbidities are significant; although being lower than those found in patients with milder grades of obesity.

Weight regain and the metabolic profile of women in the postoperative period of bariatric surgery: a multivariate analysis / Reganho de peso e perfil metabólico de mulheres no pós-operatório de cirurgia bariátrica: análise multiariada

ABSTRACT BACKGROUND: Weight regain in the postoperative period after bariatric surgery is directly related to the relapse of preoperative comorbidities and a negative impact on the patients' biochemical profile. AIMS: To assess the metabolic impact of weight regain on preoperative comorbidities and on patients' biochemical profiles, in order to show the impact of the complications on the metabolic outcomes of bariatric surgery. METHODS: A retrospective study was carried out with 75 women in the late postoperative period of bariatric surgery who presented pathological weight regain (≥20% of the maximum weight loss). Data of interest consisted of glycemic, lipid, and inflammatory profile measurements at three different moments of evaluation: preoperative period, at the weight nadir (minimum weight), and after weight regain. A multivariate analysis was performed. RESULTS: The mean age was 46.39±12.09 years. Preoperative body mass index was 40.10±4.11 kg/m2. There was an overall increase of 3.36 points in the mean body mass index between the nadir and after regain: from 26.30±3.9 kg/m2 to 29.66±4.66 kg/m2. The mean time to reach the nadir was 18±7.6 months, with an average percentage of excess weight loss of 91.08±11.8%. The median time for pathological weight regain was 48 months, and the mean regain amongst the sample was 8.85±5.65 kg. There was a significant correlation between pathological weight regain and levels of insulin (r=0.351; p<0.011), C-peptide (r=0.303; p<0.011), C-reactive protein (r=0.402; p<0.001), and vitamin D (r=-0.435; p<0.001), the last two being the most influenced by the percentage of weight regained. CONCLUSIONS: The pathological weight regain in the postoperative period of bariatric surgery results in losses in the patients' metabolic and inflammatory profiles. However, the biochemical benefits are sustained up to the preoperative levels of the parameters analyzed.

RESUMO RACIONAL: Reganho de peso no pós-operatório de cirurgia bariátrica está diretamente relacionado à recidiva das comorbidades pré-operatórias e a um impacto negativo no perfil bioquímico desses pacientes. OBJETIVOS: avaliar o impacto metabólico do reganho de peso nas comorbidades pré-operatórias e no perfil bioquímico desses pacientes, a fim de mostrar o impacto das complicações nos desfechos metabólicos finais da cirurgia bariátrica. MÉTODOS: Estudo retrospectivo que analisou 75 mulheres no pós-operatório tardio de cirurgia bariátrica que apresentaram reganho patológico de peso (=20% do máximo de peso perdido). Foram coletados dados referentes às medidas dos perfis glicêmico, lipídico e inflamatório em três momentos distintos de avaliação: no pré-operatório, no nadir de peso (menor peso) e após o reganho ponderal. Foi realizada uma análise multivariada. RESULTADOS: A idade média foi 46.39±12.09 anos. IMC médio pré-operatório foi 40.10±4.11 kg/m2. Houve um aumento de 3,36 pontos no IMC médio entre o nadir e após reganho: de 26.30±3.9 Kg/m2 para 29.66±4.66 Kg/m2. O tempo médio para atingir o nadir foi de 18±7.6 meses, com uma %PEP de 91.08±11.8%. O tempo médio para o reganho patológico foi de 48 meses, e a média de reganho foi 8.85±5.65 kg. Houve correlação significativa entre o reganho patológico e os níveis de insulina (r=0.351; p<0.011), peptídeo C (r=0.303; p<0.011), proteína C reativa (r=0.402; p<0.001) e vitamina D (r=-0.435; p<0.001), sendo os dois últimos os mais influenciados pela porcentagem de reganho de peso. CONCLUSÕES: O reganho de peso patológico no pós-operatório de cirurgia bariátrica resulta em prejuízos ao perfil metabólico e inflamatório dos pacientes. No entanto, os benefícios bioquímicos perduram em relação aos níveis pré-operatórios dos parâmetros analisados

Long-term evaluation of patients with BMI = 50kg/m2 who underwent Bariatric Surgery / Avaliação no longo prazo de pacientes submetidos à Cirurgia Bariátrica com IMC = 50kg/m2

ABSTRACT Purpose: to determine the risks and benefits of bariatric surgery in patients with super obesity (SO) in comparison with obesity grades II and III. Methods: retrospective cohort that included a study group of 178 patients with SO and a control group of 181 patients with BMI 35-49.9Kg/m2. The groups were formed in a 1:1 nearest neighbor matching. The main variables were pre- and postoperative BMI and comorbidities, occurrence of severe postoperative complications, bowel obstruction, marginal ulcer, fistulae and 30-day death, besides the necessity of emergency room (ER) admission and abdominal computed tomography (CT) scans in the postoperative period due to acute abdomen. Results: the study group comprised 74.0% of women while the control group had 56.7%. The mean follow-up time was similar between both groups (5.48 x 6.09 years, p=0.216). There was no statistically significant difference on the prevalence of hypertension and T2D between the groups according to the surgical technique. All deaths occurred in the Study group (BMI = 50kg/m2) who underwent RYGB. There was no difference between the groups regarding the occurrence of severe complications. Data on ER admissions and the need for abdominal CT to investigate postoperative abdominal pain did not show statistically significant difference between the groups. Conclusion: despite the high risk related to bariatric surgery in patients with SO, the benefits related to the remission of comorbidities are significant; although being lower than those found in patients with milder grades of obesity.

RESUMO Objetivo: determinar os riscos e benefícios da cirurgia bariátrica em pacientes com superobesidade em comparação com obesidade graus II e III. Métodos: coorte retrospectiva que incluiu um grupo Estudo com 178 pacientes portadores de superobesidade e um controle com 181 pacientes com IMC 35-49.9Kg/m2. Os grupos foram formados numa razão 1:1 com pareamento "vizinho próximo". As principais variáveis foram comorbidades e IMC pré e pós-operatório, ocorrência de complicações pós-operatórias severas, obstrução intestinal, úlcera marginal, fístula e morte em 30 dias, além da necessidade de idas à emergência e realização de tomografia computadorizada (CT) para investigação de abdome agudo. Resultados: o grupo Estudo foi composto por 74.0% de mulheres, enquanto o Controle teve apenas 56.7%. O tempo médio de seguimento foi similar em ambos os grupos (5.48 x 6.09 anos, p=0.216). Não houve diferença estatisticamente significativa em relação à prevalência de diabetes entre os grupos nem entre a técnica cirúrgica empregada. Todos os óbitos ocorreram no grupo Estudo (IMC = 50kg/m2), com apenas pacientes submetidos ao BGYR. Não houve diferença significativa entre os grupos em relação à ocorrência de complicações pós-operatórias. Ao avaliar idas à emergência e necessidade de TC para investigar dor abdominal, também não foi observada difrença significativa entre os grupos. Conclusão: apesar do alto risco cirúrgico implicado em pacientes portadores de superobesidade, os benefícios relacionados à remissão de comorbidades ainda são significativos; contudo os resultados parecem ser inferiores aos pacientes com graus mais leves de obesidade.

Bilateral R5-R8 sympathectomy for compensatory hyperhidrosis: complications and patient satisfaction. / Simpatectomia bilateral R5-R8 no tratamento de hiperidrose compensatória: análise de complicações e satisfação dos pacientes.

OBJECTIVE: The purpose of this study was to assess the quality of life of patients who had undergone bilateral thoracic sympathectomy from R5 to R8 as a treatment for severe and debilitating compensatory hyperhidrosis (CH). METHODS: Twelve patients with severe and debilitating compensatory hyperhidrosis underwent extended sympathectomy (R5-R8) from September 2016 to May 2019 at the Hospital das Clínicas, Federal University of Pernambuco, Brazil. Outcomes such as the level of patient satisfaction with the operation, quality of life scores as well as postoperative complications were assessed. RESULTS: There has been a substantial improvement in the quality of life score of 66% of the sample. In all four domains, a statistical significant difference was seen, regarding the relief of compensatory hyperhidrosis symptoms. CONCLUSIONS: Extended sympathectomy from R5 to R8 was shown to be quite effective in most cases, leading us to believe that this approach could be a therapeutic option for severe compensatory hyperhidrosis.

OBJETIVO: Avaliar a qualidade de vida de pacientes submetidos a simpatectomia torácica bilateral de R5 a R8 como forma de tratamento da hiperidrose compensatória (HC) grave e debilitante em pacientes que foram previamente submetidos a simpatectomia torácica bilateral para tratamento da hiperidrose localizada. MÉTODOS: Doze pacientes com hiperidrose compensatória grave e debilitante foram submetidos a simpatectomia estendida no Hospital das Clínicas da Universidade Federal de Pernambuco, Brasil, entre setembro de 2016 e maio de 2019. Os seguintes desfechos foram estudados: nível de satisfação com a operação, escore de qualidade de vida e as possíveis complicações cirúrgicas. RESULTADOS: Houve significativa melhora na qualidade de vida em 66% da amostra. Em todas as esferas de função, foi evidenciada relevância estatística no que se refere ao alívio dos sintomas relacionados à hiperidrose compensatória. CONCLUSÕES: A simpatectomia estendida de R5 a R8 mostrou-se efetiva na maioria dos casos operados, caracterizando este procedimento como promissor, podendo, após estudos futuros, ser incluído como uma opção terapêutica para a hiperidrose compensatória.

Simpatectomia bilateral R5-R8 no tratamento de hiperidrose compensatória: análise de complicações e satisfação dos pacientes / Bilateral R5-R8 sympathectomy for compensatory hyperhidrosis: complications and patient satisfaction

RESUMO Objetivo: Avaliar a qualidade de vida de pacientes submetidos a simpatectomia torácica bilateral de R5 a R8 como forma de tratamento da hiperidrose compensatória (HC) grave e debilitante em pacientes que foram previamente submetidos a simpatectomia torácica bilateral para tratamento da hiperidrose localizada. Métodos: Doze pacientes com hiperidrose compensatória grave e debilitante foram submetidos a simpatectomia estendida no Hospital das Clínicas da Universidade Federal de Pernambuco, Brasil, entre setembro de 2016 e maio de 2019. Os seguintes desfechos foram estudados: nível de satisfação com a operação, escore de qualidade de vida e as possíveis complicações cirúrgicas. Resultados: Houve significativa melhora na qualidade de vida em 66% da amostra. Em todas as esferas de função, foi evidenciada relevância estatística no que se refere ao alívio dos sintomas relacionados à hiperidrose compensatória. Conclusões: A simpatectomia estendida de R5 a R8 mostrou-se efetiva na maioria dos casos operados, caracterizando este procedimento como promissor, podendo, após estudos futuros, ser incluído como uma opção terapêutica para a hiperidrose compensatória.

ABSTRACT Objective: The purpose of this study was to assess the quality of life of patients who had undergone bilateral thoracic sympathectomy from R5 to R8 as a treatment for severe and debilitating compensatory hyperhidrosis (CH). Methods: Twelve patients with severe and debilitating compensatory hyperhidrosis underwent extended sympathectomy (R5-R8) from September 2016 to May 2019 at the Hospital das Clínicas, Federal University of Pernambuco, Brazil. Outcomes such as the level of patient satisfaction with the operation, quality of life scores as well as postoperative complications were assessed. Results: There has been a substantial improvement in the quality of life score of 66% of the sample. In all four domains, a statistical significant difference was seen, regarding the relief of compensatory hyperhidrosis symptoms. Conclusions: Extended sympathectomy from R5 to R8 was shown to be quite effective in most cases, leading us to believe that this approach could be a therapeutic option for severe compensatory hyperhidrosis.

Evaluation of nicotine patch in pain control of patients undergoing laparoscopic cholecystectomy.

OBJECTIVE: to analyze the effects of nicotine patch on pain control, occurrence of nausea and its hemodynamic repercussions in laparoscopic cholecystectomy procedures. METHODS: we conducted an analytical, prospective, randomized, triple-blinded, clinical study between January and July 2017. The sample consisted of 17 patients who underwent laparoscopic cholecystectomy for the treatment of cholelithiasis. Nine patients used nicotine patch, and eight, placebo patch. The studied variables were pain, nausea, patient satisfaction, blood pressure, heart rate, oximetry and morphine rescue. RESULTS: taking into account the pain and nausea parameters, there was no statistically significant difference between the groups (p>0.05). Also, the evaluation of rescue medication, both opioids and prokinetics, did not show any significant statistical difference between the groups. Among the hemodynamic parameters, there was only one statistically significant difference in the analysis of oxygen saturation and systolic blood pressure (SBP) six hours after surgery: the mean oxygen saturation was higher in the Test group (97.89 x 95.88) and the mean SBP was higher in the Control group (123.89 x 110.0). CONCLUSION: although pain levels were lower for nicotine within 24 hours, the action of nicotine and the need for rescue opioids in pain control were not statistically significant between the groups and at the time intervals studied. There was no clinical repercussion in the hemodynamic parameters.

PROSPECTIVE STUDY OF ASPIRIN FOR THROMBOEMBOLISM PROPHYLAXIS IN TOTAL HIP ARTHROPLASTY.

OBJECTIVES: To evaluate the effectiveness of aspirin as prophylaxis for deep venous thrombosis (DVT) in patients undergoing total hip arthroplasty (THA), and to analyze the incidence of bleeding during the post-operative period. METHODS: This prospective study carried out in 2017 consisted of 37 patients indicated for THA with high risk for DVT. Immediately after the procedure, aspirin, elastic compression socks and early deambulation were initiated. Doppler ultrasound was performed in the legs 6 days and 6 weeks post-procedure to rule out venous thromboembolism. Hematometric variables and clinical criteria were used to detect bleeding. RESULTS: The incidence of VTE (venous thromboembolism) 6 days post-procedure was 21.6%. By 6 weeks post-procedure, it dropped to 8.1%, (p = 0.102). Only 2.7% were diagnosed with VTE, 6 days and also 6 weeks post-procedure. Within the immediate postoperative period, hemoglobin was lower (p < 0.001), in contrast to 6 weeks after surgery, when it returned to baseline levels. CONCLUSION: Aspirin was an effective chemical prophylaxis for venous thromboembolism in high-risk patients who underwent THA. There was no clinical record of postoperative bleeding and hematometric levels suggested that there was no chronic bleeding. Level of Evidence II; Prospective study.

OBJETIVO: Avaliar a eficácia da aspirina como profilaxia da trombose venosa profunda (TVP) em pacientes submetidos à artroplastia total de quadril (ATQ) e analisar a incidência de possíveis sangramentos no pós-operatório. MÉTODO: Este estudo prospectivo realizado em 2017 foi constituído por 37 pacientes, com indicação de ATQ, com alto risco de TVP. No pós-operatório imediato foram iniciadas administração de aspirina, uso de meias de compressão elástica e deambulação precoce. Realizou-se um ultrassom com dopplerfluxometria no 6º dia e na 6ª semana de pós-operatório para excluir tromboembolismo venoso. Para detectar sangramentos, foram usadas variáveis hematimétricas e critérios clínicos. RESULTADOS: No 6o dia após o procedimento, a incidência de TEV (tromboembolismo venoso) foi 21,6% e na 6ª semana houve uma redução para 8,1% (p = 0,102). Apenas 2,7% foram diagnosticados com TVP tanto no 6o dia como na 6ª semana. No pós-operatório imediato houve uma redução da hemoglobina (p < 0,001), contrastando com a sexta semana de pós-operatório, quando esses níveis se elevaram para os níveis basais. CONCLUSÕES: A aspirina mostrou-se eficaz como profilaxia química da trombose venosa em pacientes de alto risco submetidos à ATQ. Não houve registro clínico de sangramento pós-operatório e os níveis hematimétricos sugeriram não ter havido sangramento crônico. Nível de Evidência II; Estudo prospectivo.

Prospective study of aspirin for thromboembolism prophylaxis in total hip arthroplasty / Estudo prospectivo da aspirina como profilaxia do tromboembolismo em artroplastia total do quadril

ABSTRACT Objectives: To evaluate the effectiveness of aspirin as prophylaxis for deep venous thrombosis (DVT) in patients undergoing total hip arthroplasty (THA), and to analyze the incidence of bleeding during the post-operative period. Methods: This prospective study carried out in 2017 consisted of 37 patients indicated for THA with high risk for DVT. Immediately after the procedure, aspirin, elastic compression socks and early deambulation were initiated. Doppler ultrasound was performed in the legs 6 days and 6 weeks post-procedure to rule out venous thromboembolism. Hematometric variables and clinical criteria were used to detect bleeding. Results: The incidence of VTE (venous thromboembolism) 6 days post-procedure was 21.6%. By 6 weeks post-procedure, it dropped to 8.1%, (p = 0.102). Only 2.7% were diagnosed with VTE, 6 days and also 6 weeks post-procedure. Within the immediate postoperative period, hemoglobin was lower (p < 0.001), in contrast to 6 weeks after surgery, when it returned to baseline levels. Conclusion: Aspirin was an effective chemical prophylaxis for venous thromboembolism in high-risk patients who underwent THA. There was no clinical record of postoperative bleeding and hematometric levels suggested that there was no chronic bleeding. Level of Evidence II; Prospective study.

RESUMO Objetivo: Avaliar a eficácia da aspirina como profilaxia da trombose venosa profunda (TVP) em pacientes submetidos à artroplastia total de quadril (ATQ) e analisar a incidência de possíveis sangramentos no pós-operatório. Método: Este estudo prospectivo realizado em 2017 foi constituído por 37 pacientes, com indicação de ATQ, com alto risco de TVP. No pós-operatório imediato foram iniciadas administração de aspirina, uso de meias de compressão elástica e deambulação precoce. Realizou-se um ultrassom com dopplerfluxometria no 6º dia e na 6ª semana de pós-operatório para excluir tromboembolismo venoso. Para detectar sangramentos, foram usadas variáveis hematimétricas e critérios clínicos. Resultados: No 6o dia após o procedimento, a incidência de TEV (tromboembolismo venoso) foi 21,6% e na 6ª semana houve uma redução para 8,1% (p = 0,102). Apenas 2,7% foram diagnosticados com TVP tanto no 6o dia como na 6ª semana. No pós-operatório imediato houve uma redução da hemoglobina (p < 0,001), contrastando com a sexta semana de pós-operatório, quando esses níveis se elevaram para os níveis basais. Conclusões: A aspirina mostrou-se eficaz como profilaxia química da trombose venosa em pacientes de alto risco submetidos à ATQ. Não houve registro clínico de sangramento pós-operatório e os níveis hematimétricos sugeriram não ter havido sangramento crônico. Nível de Evidência II; Estudo prospectivo.

Evaluation of nicotine patch in pain control of patients undergoing laparoscopic cholecystectomy / Avaliação do adesivo de nicotina no controle da dor em pacientes submetidos à colecistectomia videolaparoscópica

ABSTRACT Objective: to analyze the effects of nicotine patch on pain control, occurrence of nausea and its hemodynamic repercussions in laparoscopic cholecystectomy procedures. Methods: we conducted an analytical, prospective, randomized, triple-blinded, clinical study between January and July 2017. The sample consisted of 17 patients who underwent laparoscopic cholecystectomy for the treatment of cholelithiasis. Nine patients used nicotine patch, and eight, placebo patch. The studied variables were pain, nausea, patient satisfaction, blood pressure, heart rate, oximetry and morphine rescue. Results: taking into account the pain and nausea parameters, there was no statistically significant difference between the groups (p>0.05). Also, the evaluation of rescue medication, both opioids and prokinetics, did not show any significant statistical difference between the groups. Among the hemodynamic parameters, there was only one statistically significant difference in the analysis of oxygen saturation and systolic blood pressure (SBP) six hours after surgery: the mean oxygen saturation was higher in the Test group (97.89 x 95.88) and the mean SBP was higher in the Control group (123.89 x 110.0). Conclusion: although pain levels were lower for nicotine within 24 hours, the action of nicotine and the need for rescue opioids in pain control were not statistically significant between the groups and at the time intervals studied. There was no clinical repercussion in the hemodynamic parameters.

RESUMO Objetivo: analisar os efeitos do adesivo de nicotina sobre o controle da dor, ocorrência de náuseas e suas repercussões hemodinâmicas em cirurgias de colecistectomia videolaparoscópica. Métodos: estudo analítico, do tipo ensaio clínico, prospectivo, randomizado e triplo-cego realizado entre janeiro e julho de 2017. A amostra foi composta de 17 pacientes em pós-operatório de colecistectomia videolaparoscópica para tratamento de colelitíase. Nove pacientes fizeram uso do adesivo com nicotina e oito de adesivo placebo. As variáveis estudadas foram: dor, náusea, satisfação do paciente, pressão arterial, frequência cardíaca, oximetria e resgate de morfina. Resultados: levando em consideração os parâmetros dor e náuseas, não houve diferença estatisticamente significativa entre os grupos (p>0,05). Ainda, a avaliação da medicação de resgate, tanto opioide como procinéticos, também não evidenciou diferença estatística relevante entre os grupos. Dentre os parâmetros hemodinâmicos, só houve diferença estatística nas análises da saturação de oxigênio e da pressão arterial sistólica (PAS) seis horas após a cirurgia: a média da saturação de oxigênio foi maior no grupo Teste (97,89 x 95,88) e a média da PAS foi maior no grupo Controle (123,89 x 110,0). Conclusão: apesar dos níveis de dor terem sido menores para nicotina no intervalo de 24 horas, a ação da nicotina e a necessidade de opioide de resgate no controle da dor não foram estatisticamente significantes entre os grupos e intervalos de tempo estudados. Não houve repercussão clínica nos parâmetros hemodinâmicos.

Prognostic value of factors associated with hypoxia and lipid metabolism in patients with colorectal cancer

Background: Colorectal cancer (CRC) is a neoplasia with high incidence and mortality rates. It had been suggested that the inflammatory response is an important CRC prognostic factor. The disordered and accelerated proliferation of neoplastic cells decreases the oxygen and nutrient supply, generating a microenvironment characterized by hypoxia, necrosis and inflammation. This study aimed to evaluate the impact of factors associated with hypoxia, such as HIF1A (hypoxia-inducible factor 1-alpha) and VEGF (vascular endothelial growth factor), and with lipid metabolism, including PPARG (peroxisome proliferator-activated receptor-gamma), LXRA (liver X receptor-alpha) and LXRB (liver X receptor-beta), on the overall survival (OS) of CRC patients. Methods: This was a cohort study of 101 patients with high-risk stage II-III (TNM) CRC located above the peritoneal reflection. They were treated between 1990 and 2004 at the AC Camargo Cancer Center. Immunohistochemical analyses of HIF1A, VEGF, PPARG, LXRA and LXRB protein expression were performed using tissue microarrays (TMAs). Results: There was an association between the presence of vascular invasion and the lack of VEGF expression (p = 0. 028) as well as with positive HIF1A expression and lymphatic invasion (p = 0.045). The 5-year and 10-year OS rates were 76.6% and 60.2%, respectively. Patients with PPARG-positive tumors had a higher OS (p = 0.018). There were no correlations between the positive expression of VEGF, HIF1A, LXRA or LXRB and OS. The Cox regression model demonstrated that the risk of death was 2.72-fold higher in patients with PPARG-negative tumors (95% CI = 1.08­6.85). Conclusion: The PPARG expression was an independent prognostic factor for CRC tumors and might be used for risk stratification to stage II and stage III CRC patients (AU)