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RESUMEN Fundamento: el cáncer colorrectal es la neoplasia maligna más frecuente que se puede presentar en el sistema digestivo. Se ha observado un incremento gradual en América Latina, Cuba presenta indicadores de salud similares a las naciones desarrolladas, el cáncer colorrectal constituye la tercera causa de muerte entre las enfermedades malignas. Objetivo: proporcionar una recopilación teórica y actualizada de investigaciones relacionadas con la sobrevida en adultos mayores con cáncer colorrectal. Métodos: se realizó una revisión bibliográfica con el método de análisis bibliográfico sin restricciones de idioma, se consultaron las bases de datos Lilacs, Medline, PubMed y SciELO. Se utilizaron como palabras claves: sobrevida, cáncer colorrectal, adulto mayor. Resultados: el cáncer colorrectal puede cursar asintomático, la sintomatología y los signos también dependerán de la localización del tumor. En su mayoría, se detecta en la etapa sintomática, un 50 % de estos pacientes de diagnóstico tardío se encuentran en un estadio avanzado del tumor. La sobrevida de los adultos mayores con cáncer colorrectal depende también de su forma de presentación y calidad de vida. Conclusiones: la sobrevida en adultos mayores con cáncer colorrectal está influenciada por la edad del paciente, estadio en el momento del diagnóstico, forma de presentación de la enfermedad nosológica, abordaje quirúrgico, estilo y calidad de vida antes y después de ser diagnosticado.
ABSTRACT Background: colorectal cancer is the most common malignant neoplasia that can occur in the digestive system. There has been a gradual increase in Latin America, Cuba presents health indicators similar to developed nations, and colorectal cancer is the third cause of death. Objective: to provide a theoretical and updated collection of research related to survival in older adults with colorectal cancer. Methods: a bibliographic review was carried out with the bibliographic analysis method without language restrictions, the Lilacs, Medline, PubMed and SciELO databases were consulted. They were used as keywords: survival, colorectal cancer, elderly. Results: colorectal cancer can be asymptomatic, the symptoms and signs will also depend on the location of the tumor. Colorectal cancer, for the most part, is detected in the symptomatic stage, 50% of these late diagnosis patients are in an advanced stage of the tumor. The survival of older adults with colorectal cancer also depends on their presentation and quality of life. Conclusions: survival in older adults with colorectal cancer is influenced by the patient's age, stage at the time of diagnosis, presentation of the nosological entity, surgical approach, style and quality of life before and after being diagnosed.
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ABSTRACT BACKGROUND: Rectal bleeding is the most important symptom of intestinal neoplasia; thus, tests of occult blood detection in stools are widely used for pre neoplastic lesions and colorectal cancer (CRC) screening. OBJECTIVE: Evaluate the accuracy of OC-Sensor quantitative test (Eiken Chemical, Tokyo, Japan) at cut-off 10 µg Hb/g feces (50 ng/mL) in a cohort of subjects that had to undergo diagnostic colonoscopy, and if more than one sample collected in consecutive days would improve the diagnostic accuracy of the test. METHODS: Patients (mean age 56.3±9.7 years) that underwent colonoscopy prospectively randomly received one (1-sample FIT, FIT 1) or two (2-sample FIT, FIT 2) collection tubes. They collected the stool sample before starting colonoscopy preparation. Samples were analyzed by the OC-Auto Micro 80 (Eiken Chemical, Tokyo, Japan). The performance of FIT 1 and FIT 2 were compared to the colonoscopy findings. RESULTS: Among 289 patients, CRC was diagnosed in 14 (4.8%), advanced adenoma in 37 (12.8%), early adenoma in 71 (24.6%) and no abnormalities in 141 (48.8%). For FIT 1, the sensitivity for CRC was 83.3% (95%CI 36.5-99.1%), for advanced adenoma was 24% (95%CI 10.1-45.5%), with specificity of 86.9% (95%CI 77.3-92.9%). For FIT 2, the sensitivity for CRC was 75% (95%CI 35.6-95.5%), for advanced adenoma was 50% (95%CI 22.3-77.7%), with specificity of 92.9% (95%CI 82.2-97.7%). The positive likelihood ratios were 1.8 (95%CI 0.7-4.4 for FIT 1) and 7.1 (95%CI 2.4-21.4 for FIT 2) for advanced adenoma, and 6.4 (95%CI 3.3-12.3, for FIT 1) and 10.7 (95%CI 3.8-29.8, for FIT 2) for CRC. The negative likelihood ratio were 0.9 (95%CI 0.7-1, for FIT 1) and 0.5 (95%CI 0.3-0.9, for FIT 2) for advanced adenoma, and 0.2 (0.03-1.1, for FIT 1) and 0.3 (0.08-0.9, for FIT 2) for CRC. The differences between FIT 1 and FIT 2 performances were not significant. However, the comparison of the levels of hemoglobin in feces of patients of FIT 1 and FIT 2 showed that the differences between no polyp group and advanced adenoma and CRC were significant. CONCLUSION: The accuracy of OCR Sensor with 10 µg Hb/g feces cut-off was comparable to other reports and two-sample collection improved the detection rate of advanced adenoma, a pre neoplastic condition to prevent CRC incidence.
RESUMO CONTEXTO: Sangramento retal é o sintoma mais importante de neoplasia intestinal; portanto, testes para detecção de sangue oculto nas fezes são amplamente usados para rastreamento de lesões pré-neoplásicas e de câncer colorretal (CCR). OBJETIVO: Avaliar a acurácia do teste quantitativo OC-Sensor (Eiken Chemical, Tokyo, Japan) com o valor de corte de 10 µg Hb/g fezes (50 ng/mL) numa coorte de indivíduos que se submeteram à colonoscopia diagnóstica, e se mais de uma amostra coletada em dias consecutivos melhoraria a acurácia diagnóstica do teste. MÉTODOS: Pacientes (idade média 56,3±9,7 anos) que se submeteram à colonoscopia prospectivamente, randomicamente, receberam tubos de coleta: um (1-amostra FIT, FIT 1), ou dois (2-amostra FIT, FIT 2). Eles coletaram as amostras de fezes antes de iniciar o preparo da colonoscopia. As amostras foram analisadas pelo OC-Auto Micro 80 (Eiken Chemical, Tokyo, Japan). As performances do FIT 1 e do FIT 2 foram comparadas com os achados da colonoscopia. RESULTADOS: Entre 289 pacientes, CCR foi diagnosticado em 14 (4,8%), adenoma avançado em 37 (12,8%), adenoma precoce em 71 (24,6%) e sem anormalidades em 141 (48,8%). Para FIT 1, a sensibilidade para CCR foi 83,3% (95%IC 36,5-99,1%), para adenoma avançado foi 24% (95%IC 10,1-45,5%), com especificidade de 86,9% (95%IC 77,3-92,9%). Para FIT 2, a sensibilidade para CCR foi 75% (95%IC 35,6-95,5%), para adenoma avançado foi 50% (95%IC 22,3-77,7%), com especificidade de 92,9% (95%IC 82,2-97,7%). A razão de verossimilhança positiva foi 1,8 (95%IC 0,7-4,4 para FIT 1) e 7,1 (95%IC 2,4-21,4 para FIT 2) para adenoma avançado, e 6,4 (95%IC 3,3-12,3, para FIT 1) e 10,7 (95%IC 3,8-29,8, para FIT 2) para CCR. A razão de verossimilhança negativa foi 0,9 (95%IC 0,7-1, para FIT 1) e 0,5 (95%IC 0,3-0,9, para FIT 2) para adenoma avançado, e 0,2 (0,03-1,1, para FIT 1) e 0,3 (0,08-0,9, para FIT 2) para CCR. As diferenças de performance entre FIT 1 e FIT 2 não foram significantes. Entretanto, a comparação dos níveis de hemoglobina nas fezes dos pacientes de FIT 1 e FIT 2 mostraram que as diferenças entre sem pólipo e adenoma avançado e CCR foram significantes. CONCLUSÃO: A acurácia do OCR Sensor com valor de corte de 10 µg Hb/g de fezes foi comparável a outras publicações e a coleta de duas amostras melhorou a taxa de detecção de adenoma avançado, lesão pré-neoplásica, para prevenir CCR.
Subject(s)
Humans , Aged , Colorectal Neoplasms/diagnosis , Adenoma , Colonoscopy , Early Detection of Cancer , Feces , Middle Aged , Occult BloodABSTRACT
RESUMEN Fundamento: el intestino grueso se extiende desde el ciego hasta el orificio del ano. El colon es el segmento del sistema digestivo que con mayor frecuencia se ve afectado por tumores. Objetivo: describir el comportamiento del cáncer colorrectal. Métodos: se realizó un estudio observacional descriptivo de corte transversal. El universo fue 106 pacientes con diagnóstico de cáncer colorrectal. Se aplicó un muestreo no probabilístico al juicio, el mismo se conformó por 87 pacientes. La información se extrajo de las historias clínicas, registro de procederes e informes de estudio histológico. Resultados: la edad que predominó fue entre 60-69 años, el sexo femenino fue el más frecuente. Dominó el cambio en el hábito intestinal como manifestación clínica. Se acentuaron las localizaciones de rectosigmoide como la más afectada por los tumores. Los adenocarcinomas fueron los tipos anatomopatológicos que se destacaron. Conclusiones: predominaron los pacientes en el grupo de edades entre 60-69 años y del sexo femenino. La localización más frecuente de la tumoración de colon fue en el rectosigmoide. El tipo histológico de la lesión más frecuente fue el adenocarcinoma donde se halló en más de la mitad de los casos.
ABSTRACT Background: the large intestine extends from the cecum to the orifice of the anus. The colon is segment of the digestive system that with greater frequency is affected by tumors. Objective: to determine the behavior of colorectal cancer. Methods: a cross-sectional descriptive observational study was carried out. The universe was 106 patients with colon cancer diagnosis. The non-probabilistic sample was formed by the 87 patients who met, inclusion and exclusion criteria. The information was extracted from the medical records, procedure records and histologic studies. Results: the age that predominated was between 60-69 years, the female sex prevailed. The locations in the rectosigmoide were accentuated. The adenocarcinomas were the anatomical-pathological types that stood out. Conclusions: the group of ages between 60-69 years, of the female sex, predominated. The change in the habit intestinal was the clinical manifestation. The most frequent histological type of the lesion was the adenocarcinoma in more than half of the cases.
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Abstract Colorectal cancer (CRC) is a disease without evident clinical symptoms in early stages, leading to late diagnosis and disease management. Current diagnostic and prognostic tools require invasive procedures and circulating molecular biomarkers fail to have optimal sensitivity and specificity. Circulating biomarkers with high clinical performance may be valuable for early diagnosis and prognosis of CRC. The purpose of this review was to investigate the application of circulating cell-free DNA (ccfDNA) in CRC diagnosis and prognosis and the analytical methods used in blood samples in articles published between 2005 and 2016. Based on specific inclusion and exclusion criteria, 26 articles were selected. Most studies used ccfDNA quantification as the molecular biomarker. The analytical method was mainly based on the quantitative polymerase chain reaction (qPCR). Biomarkers based on aberrantly methylated genes (n=6) and ccfDNA integrity/fragmentation (n=2) were also used for the CRC diagnosis. The CRC prognosis used the detection of oncogene mutations, such as KRAS and BRAF, in ccfDNA. Significant differences were found in variables among the studies revealing potential bias. ccfDNA quantification as a diagnostic biomarker for CRC has promising results but it lacks clinical specificity since other diseases present a similar increase in ccfDNA content. However, increasing research in the epigenomic field can lead the way to a clinically specific biomarker for the CRC early diagnosis. As for the analytical method, qPCR and derivatives seem to be a perfectly valid technique. The use of ccfDNA quantification in CRC prognosis seems promising. The attempt to use the ccfDNA quantification in clinical practice may reside in the prognosis using a qPCR technique.
Subject(s)
Prognosis , Colorectal Neoplasms/diagnosis , Cell-Free Nucleic Acids/adverse effects , Biomarkers , Early Diagnosis , Neoplastic Cells, CirculatingABSTRACT
Background - Colorectal cancer is one of the main cause of cancer in the world. Colonoscopy is the best screen method, however the compliance is less than 50%. Quantification of human DNA (hDNA) in the feces may be a possible screen non-invasive method that is a consequence of the high proliferation and exfoliation of cancer cells. Objective - To quantify the human DNA in the stools of patients with colorectal cancer or polyps. Methods - Fifty patients with CRC, 26 polyps and 53 with normal colonoscopy were included. Total and human DNA were analyzed from the frozen stools. Results - An increased concentration of hDNA in the stools was observed in colorectal cancer patients compared to controls and polyps. Tumors localized in the left side of the colon had higher concentrations of hDNA. There were no difference between polyps and controls. A cut off of 0.87 ng/mL of human DNA was determined for colorectal cancer patients by the ROC curve, with a sensitivity of 66% and a specificity of 86.8%. For polyps the cut off was 0.41, the sensitivity was 41% and the specificity 77.4%. Conclusion - A higher concentration of hDNA had been found in colorectal cancer patients The quantification of hDNA from the stools can be a trial method for the diagnosis of colorectal cancer.
Contexto - O câncer colorretal é, mundialmente, uma das principais causas de câncer. A colonoscopia é o melhor método de rastreamento, no entanto a adesão é inferior a 50%. A quantificação de DNA humano (hDNA) nas fezes pode ser um possível método não invasivo de rastreamento, que é consequência da elevada proliferação e esfoliação de células cancerosas. Objetivo - Quantificar o DNA humano nas fezes de pacientes com câncer colorretal ou pólipos Métodos - Cinquenta pacientes com câncer colorretal, 26 pólipos e 53 com colonoscopia normal foram incluídas. DNA total e humano foram analisados a partir de fezes congeladas. Resultados - Maior concentração de hDNA nas fezes foi observada em pacientes com câncer colorretal em comparação com controles e pólipos. Pacientes com tumores localizados no cólon esquerdo apresentaram concentrações mais elevadas de hDNA. Não houve diferença entre pólipos e controles. Um nível de corte de 0.87ng/mL de DNA humano foi determinado para pacientes com câncer colorretal pela curva ROC, com sensibilidade de 66% e especificidade de 86,8%. Para pólipos o nível de corte foi de 0,41, a sensibilidade foi de 41% e a especificidade de 77,4%. Conclusão - Maior concentração de hDNA foi encontrada em pacientes com câncer colorretal. A quantificação de hDNA das fezes pode ser um método de rastreio do câncer colorretal.
Subject(s)
Female , Humans , Male , Colorectal Neoplasms/diagnosis , DNA, Neoplasm/analysis , Feces/chemistry , Biomarkers, Tumor/analysis , Case-Control Studies , Colonoscopy , Neoplasm Staging , Polymerase Chain Reaction , Reproducibility of Results , ROC Curve , Sensitivity and SpecificityABSTRACT
Justificativa e objetivos: o câncer colorretal (CCR) é a terceira neoplasia maligna mais comum e a segunda maior causa de morte relacionada ao câncer. A colonoscopia é a técnica de mais acuidade para o diagnóstico de lesões estruturais do cólon. O objetivo deste estudo foi calcular o índice de concordância diagnóstica (Kappa) da colonoscopia na suspeição de câncer colorretal comparando com o exame histopatológico(padrão-ouro) em pacientes sintomáticos examinados entre 2007 e 2010.Pacientes e métodos: foram estudados 233 casos de forma observacional e prospectiva. Resultados: alterações colonoscópicas suspeitas de câncer colorretal estavam presentes em 24 (6,87%) dos pacientes submetidos à colonoscopia e o diagnóstico foi confirmado pela histopatologia em 21 casos. Os locais mais acometidos pelo CCR foram o cólon (62,5%) e o reto (37,5%), não sendo encontradas lesões em ânus e canal anal. O cólon esquerdo foi o mais acometido (75%), com 58,33% das lesões em região sigmoide; e no cólon direito foram encontrados 25% das lesões. Conclusão: o índice Kappa de concordância diagnóstica nesta amostra na detecção do câncer colorretal foi de 0,88 com IC 0,78 e 0,98, considerado substancial.
Justification and objective: colorectal cancer (CRC) is the third most common malignant neoplasm and the second major cause of cancer-related death. Colonoscopy is the most accurate technique for diagnosing structural lesions in the colon. The aim of this study was to calculate the diagnostic agreement rate (Kappa) of colonoscopy in cases of suspected colorectal cancer and histopathological examination (gold standard) in symptomatic patients examined between 2007-2010. Patients and methods: 233 cases were assessed in this observational prospective study. Results: changes upon colonoscopy suggestive of colorectal cancer were present in 24 (6.87%) patients submitted to colonoscopyand diagnosis was confirmed by histopathology in 21 cases. Most affected by CRC were the colon (62.5%) and rectum (37.5%), and no lesions were found in the anus or anal canal. The left colon was the most affected (75%), with 58.33% of the lesions in the sigmoid region; and 25% of lesions were found in the right colon. Conclusion: The Kappa index of diagnostic agreement for this sample in the detection of colorectal cancer was 0.88 with CI 0.78 and 0.98, considered substantial.
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged, 80 and over , Colorectal Neoplasms/diagnosis , Colorectal Neoplasms/pathology , Biopsy , ColonoscopyABSTRACT
Diversos estudos buscam agregar métodos de diagnóstico e de terapêutica com o intuito de diminuir a incidência e a morbimortalidade do câncer colorretal (CCR). Novas tecnologias propostas para esse fim decorrem da análise do DNA fecal, terapias voltadas para alvos moleculares específicos e determinação de resposta terapêutica e prognóstico com a análise genética. Este estudo procura revisar essas novas conquistas e apresentá-las para que possam ser usadas de forma prática e objetiva.
Several studies seek to enhance diagnosis and treatment of colorectal cancer (CRC) in order to reduce its incidence and mortality. New technologies proposed include the analysis of fecal DNA, therapies aimed at specific molecular targets and determination of therapeutic response and prognosis with genetic analysis. This study aims to review these new achievements and present them so that they can be used in a practical and objective way.