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      Fatores prognósticos na ressecção de metástases hepáticas de câncer colorretal Translated title: Prognostic factors following liver resection for hepatic metastases from colorectal cancer

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          Abstract

          OBJETIVO: Determinar o impacto de fatores prognósticos na sobrevida de pacientes com metástases hepáticas ressecadas e originadas de câncer colorretal. CASUÍSTICA E MÉTODOS: Foram analisados os prontuários de 28 pacientes submetidos a ressecção hepática de metástases de câncer colorretal de abril de 1992 a setembro de 2001. Foram realizadas 38 ressecções (8 pacientes com mais de uma ressecção no mesmo tempo cirúrgico e 2 pacientes submetidos a re-ressecções). Todos haviam sido submetidos previamente a ressecção do tumor primário. Utilizou-se protocolo de rastreamento de metástases hepáticas que incluiu revisões clínicas trimestrais, ecografia abdominal e dosagem de CEA até se completarem 5 anos de seguimento e após, semestralmente. Os fatores prognósticos estudados foram: estágio do tumor primário, tamanho das metástases > 5cm, intervalo entre ressecção do tumor primário e surgimento da metástase < 1 ano, CEA >100 ng/mL, margens cirúrgicas < 1cm e doença metastática extra-hepática. O estudo foi retrospectivo e a análise estatística foi feita pela curva de Kaplan-Meier, log-rank e regressão de Cox. RESULTADOS: A morbidade foi 39,3% e a mortalidade operatória foi 3,6%. A sobrevida em 5 anos foi de 35%. Os fatores prognósticos independentes adversos foram: intervalo < 1 ano entre ressecção do tumor primário e surgimento da metástase, e doença metastática extra-hepática. CONCLUSÕES: A ressecção hepática de metástases de câncer colorretal é um procedimento seguro com sobrevida em 5 anos acima dos 30%. Foram fatores prognósticos independentes adversos: doença metastática extra-hepática e intervalo < 1 ano entre ressecção do tumor primário e surgimento da metástase.

          Translated abstract

          AIM: To determine the impact of prognostic factors on survival of patients with metastases from colorectal cancer that underwent liver resection. METHODS: The records of 28 patients that underwent liver resection for metastases from colorectal cancer between April 1992 and September 2001 were retrospectively analyzed. Thirty-eight resections were performed (more than one resection in eight patients and two patients underwent re-resections). The primary tumor was resected in all the patients. A screening protocol for liver metastases including clinical examinations every three months, ultrassonography and CEA level until 5 years of follow-up and after every 6 months, was applied. The prognostic factors analyzed regarding the impact on survival were: Dukes C stage of primary tumor, size of metastasis >5 cm, a disease-free interval from primary tumor to metastasis < 1 year, CEA level > 100 ng/mL, resection margins < 1 cm and extrahepatic disease. The Kaplan-Meier curves, log rank and Cox regression were used for the statistical analysis. RESULTS: Perioperative morbidity and mortality were 39.3% and 3.6%, respectively. The 5-year survival rate was 35%. The independent prognostic factors were: disease-free interval from primary tumor to metastasis < 1 year and extrahepatic disease. CONCLUSIONS: The liver resection for metastases from colorectal cancer is a safe procedure with more than 30% 5-year survival. Disease-free interval from primary tumor to metastasis < 1 year and extrahepatic disease were independent prognostic factors.

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          Practical statistics for medical research. Douglas G. Altman, Chapman and Hall, London, 1991. No. of pages: 611. Price: £32.00

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            Experience in hepatic resection for metastatic colorectal cancer: analysis of clinical and pathologic risk factors.

            The selection of patients for resective therapy of hepatic colorectal metastases remains controversial. A number of clinical and pathologic prognostic risk factors have been variably reported to influence survival. Between January 1981 and December 1991, 204 patients underwent curative hepatic resection for metastatic colorectal cancer. Fourteen clinical and pathologic determinants previously reported to influence outcome were examined retrospectively. This led to a proposed TNM staging system for metastatic colorectal cancer (mTNM). No operative deaths occurred (death within 1 month). Overall 1-, 3-, and 5-year survivals were 91%, 43%, and 32%, respectively. Gender, Dukes' classification, site of primary colorectal cancer, histologic differentiation, size of metastatic tumor, and intraoperative blood transfusion requirement were not statistically significant prognostic factors (p > 0.05). Age of 60 years or more, interval of 24 months or less between colorectal and hepatic resection, four or more gross tumors, bilobar involvement, positive resection margin, lymph node involvement, and direct invasion to adjacent organs were significant poor prognostic factors (p < 0.05). In the absence of nodal disease or direct invasion, patients with unilobar solitary tumor of any size, or unilobar multiple tumors of 2 cm or smaller (stages I and II) had the highest survival rates of 93% at 1 year, 68% at 3 years, and 61% at 5 years. Unilobar disease with multiple lesions greater than 2 cm (stage III) resulted in 1-, 3-, and 5-year survivals of 98%, 45%, and 28%, respectively. Patients with bilobar involvement (multiple tumors, any size, or a single large metastasis) (stage IVA) had survival rates of 88% at 1 year, 28% at 3 years, and 20% at 5 years (p < 0.00001). Patients with nodal involvement or extrahepatic disease (stage IVB) experienced the poorest outcome with 1-, 3-, and 5-year survivals of 80%, 12%, and 0%, respectively (p < 0.00001). The proposed mTNM staging system appears to be useful in predicting the outcomes after hepatic resection of metastatic colorectal tumors.
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              Resection of the liver for colorectal carcinoma metastases: a multi-institutional study of indications for resection. Registry of Hepatic Metastases.

              In an investigation of the indications for hepatic resection in the treatment of colorectal carcinoma metastases, the records of 859 patients who had undergone this procedure were reviewed. This patient group, from 24 institutions, was found to have a 5-year actuarial survival of 33% and a 5-year actuarial disease-free survival of 21%. The only factors that might by themselves be considered contraindications to hepatic resection are the presence of positive hepatic nodes, the presence of resectable extrahepatic metastases, or the presence of four or more metastases. Other factors that had a negative effect on long-term survival were margins of resection on the liver metastases less than or equal to 1 cm (S [5-year actuarial survival] = 23%), the presence of positive mesenteric nodes in the primary tumor specimen (S = 23%), and a disease-free interval of less than 1 year (S = 24%). The effect of any one of these factors was not great enough to contraindicate resection. However, combinations of prognostic factors must be considered before resection is recommended. The overall 5-year survival rate for this large series has been very satisfying. Decision making in the future must take into account such factors as number of metastases, extrahepatic involvement, and stage of the primary tumor.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                ag
                Arquivos de Gastroenterologia
                Arq. Gastroenterol.
                Instituto Brasileiro de Estudos e Pesquisas de Gastroenterologia - IBEPEGE (São Paulo )
                1678-4219
                September 2003
                : 40
                : 3
                : 159-165
                Affiliations
                [1 ] Hospital Ernesto Dornelles
                [2 ] Universidade Federal do Rio Grande do Sul Brazil
                [3 ] Universidade Federal do Rio Grande do Sul Brazil
                Article
                S0004-28032003000300005
                10.1590/S0004-28032003000300005
                2b2c92a5-c0b5-4118-b14a-ca3cc5ebcc93

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0004-2803&lng=en
                Categories
                GASTROENTEROLOGY & HEPATOLOGY

                Gastroenterology & Hepatology
                Colorectal neoplasms,Liver neoplasms,Neoplasm metastasis,Prognosis,Neoplasias colorretais,Neoplasias hepáticas,Metástase neoplásica,Prognóstico

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