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1.
Arq. gastroenterol ; 58(3): 390-393, July-Sept. 2021. tab, graf
Article in English | LILACS | ID: biblio-1345305

ABSTRACT

ABSTRACT BACKGROUND: Since 2012, a new technique for resection of large polyps has been described, the underwater endoscopic mucosal resection (UEMR). Some advantages that emerge from it is the needless of injection in submucosal layer and a greater chance of complete capture of the polyp. OBJECTIVE: There are few studies of UEMR in Brazil. The aim of this study is to evaluate the safety and efficacy of this technique in one Brazilian center. METHODS: This case series was conducted from February to December of 2020. Colorectal polyps greater than 9 mm without features of deep submucosal invasion were resected using UEMR. RESULTS: Twenty-four large polyps were resected with the UEMR approach from 24 patients. The mean size of the polys was 19 mm, ranging from 12 to 35 mm. All lesions were successful resected and 66% (16/24) were resected en bloc. In histologic analyses, most of them were adenomas (70.8%) and only one had deep submucosal invasion. There were no cases of acute complications, such perforation or acute bleeding. CONCLUSION: The UEMR is a safe and feasible procedure. With the emerging data on the procedure, it seems to be a wonderful tool in preventing colorectal cancer and its applicability and scope should be encourage to surpass reference centers.


RESUMO CONTEXTO: Desde 2012, uma nova técnica para ressecção de pólipos grandes tem sido descrita, a ressecção da mucosa endoscópica sob imersão d'água (REMS). Algumas vantagens que surgem desta técnica são evitar a injeção na camada submucosa e a maior chance de captura completa do pólipo. Objetivo - Há poucos estudos com REMS no Brasil. Nosso objetivo é avaliar a segurança e a eficácia da técnica em um centro brasileiro. MÉTODOS: Esta série de casos foi conduzida de fevereiro a dezembro de 2020. Pólipos colorretais maiores que 9 mm sem sinais endoscópicos de invasão de submucosa foram ressecados utilizando RMES. RESULTADOS: Vinte e quatro pólipos foram ressecados com RMES em 24 pacientes diferentes. O tamanho médio dos pólipos era de 19 mm, variando de 12 a 35 mm. Todas as lesões foram ressecadas e 66% (16/24) foram ressecadas em monobloco. Na análise histológica, a maioria era adenoma (70.8%) e apenas uma havia invasão profunda da submucosa. CONCLUSÃO: O uso de REMS é um procedimento seguro e factível. Com o aumento de dados relativos ao procedimento, esta parece ser uma excelente ferramenta na prevenção do câncer colorretal e sua aplicabilidade deve ser encorajada para fora dos centros de referência.


Subject(s)
Humans , Colorectal Neoplasms/surgery , Colorectal Neoplasms/pathology , Colonic Polyps/surgery , Colonic Polyps/pathology , Endoscopic Mucosal Resection , Brazil , Colonoscopy , Ambulatory Care , Intestinal Mucosa , Intestinal Mucosa/surgery
2.
Arq. gastroenterol ; 58(3): 359-363, July-Sept. 2021. tab, graf
Article in English | LILACS | ID: biblio-1345304

ABSTRACT

ABSTRACT BACKGROUND: The gold standard test for colorectal cancer screening the colonoscopy. Although this is the test of choice, colonoscopy misses a significant number of lesions, mainly in the proximal colon. With the purpose of reducing the number of lesions missed, new techniques have been studied, amongst them, retroflexed view in the right side of the colon and the second direct forward view. OBJECTIVE: Assessing the safety of the retroview in the proximal colon (cecum and ascending colon), its impact on the detection of lesions in the proximal colon and its advantage over the double right forward view using adenoma detection rate and adenoma miss rate. METHODS: Three hundred and ninety-three patients who came to Hospital Mater Dei to undergo colonoscopy from March to July 2017, prospectively. Out of these, 372 were included in the study based on the following exclusion criteria: being under 18 years of age, inadequate bowel preparations (Boston scale <7), history of colectomy, inflammatory bowel disease or polypoid diseases. First, an endoscopist inserted the colonoscope into the cecum and examine the cecum and the ascending colon with a forward view twice. In the third insertion into the cecum, retroflexed view was performed, cecal mucosa was examined until the hepatic flexure in search of polyps missed on forward view. All lesions found were resected and sent for histological analysis. RESULTS: In 334 (89.8%) patients, retroflexed view was performed successfully, 65.8% of failures were attributed to the loops of the device which prevented the maneuver. The direct view identified 175 polyps in the proximal colon in 102 people. Retroflexed view detected 26 polyps missed by the direct view in 24 (6.5%) people, with a missing rate of 12.9% in the test with only the forward view. Out of the 26 polyps found in retroview, 21 (80.76%) were adenomas, one of them with a high-grade dysplasia. Eleven patients had polyps seen only in retroflexed view. Retroview has increased the polyp detection rate from 27.41% to 31.72% and the adenoma detection rate from 21.77% to 25%. The adenoma miss rate by the double direct view was 12.8%. Without the retroview, one polyp in every 13.91 colonoscopies would be missed (number needed to treat - NNT=13.91). There was no adverse event. CONCLUSION: The retroflexed view technique in the proximal colon was shown to be safe, fast and feasible in most cases. It increased the adenoma detection rate and was shown to be advantageous in this study wit benefit beyond the double direct view.


RESUMO CONTEXTO: O exame padrão ouro para rastreamento de câncer colorretal é a colonoscopia. Apesar de ser o exame de escolha, a colonoscopia perde um número não desprezível de lesões, principalmente no cólon proximal. Com a intenção de reduzir a perda de lesões, novas técnicas são estudadas, dentre elas, a retroflexão em cólon direito e a segunda visão frontal direta. OBJETIVO: Avaliar a segurança da retrovisão no cólon proximal (ceco e cólon ascendente), o seu impacto na detecção de lesões em cólon proximal e sua superioridade sobre a dupla visão frontal direta usando taxa de detecção de adenoma e taxa de adenoma perdido. MÉTODOS: Foram avaliados 393 pacientes de forma prospectiva que procuraram o Hospital Mater Dei para realizar colonoscopia entre março e julho de 2017. Desses, 372 foram incluídos baseados nos critérios de exclusão: menores de 18 anos, preparos intestinais inadequados (escala de Boston <7), com antecedente de colectomia, doença inflamatória intestinal ou síndromes polipoides. Primeiramente um endoscopista realizou a inserção do colonoscópio até o ceco e examinou o ceco e o cólon ascendente em visão frontal por duas vezes. Na terceira reinserção até o ceco era realizada a retroflexão e inspeção da mucosa do ceco até a flexura hepática em busca de pólipos perdidos à visão frontal. Todas lesões encontradas foram ressecadas e enviadas para análise histológica. RESULTADOS: Em 334 (89,8%) pacientes a retroflexão foi realizada com sucesso, 65,8% dos insucessos foram atribuídos a alças no aparelho que impediram a manobra. A visão direta identificou 175 pólipos no cólon proximal em 102 pessoas. A retroflexão detectou 26 pólipos perdidos pela visão direta em 24 (6,5%) pessoas, com uma taxa de perda de 12,9% no exame apenas em visão frontal. Dos 26 pólipos encontrados em retrovisão, 21 (80,76%) eram adenomas, um deles com displasia de alto grau. Onze pacientes tinham pólipos vistos apenas em retroflexão. A realização da retrovisão aumentou a taxa de detecção de pólipo de 27,41% para 31,72% e a taxa de detecção e adenomas de 21,77% para 25%. A taxa de adenoma perdido pela dupla visão direta foi de 12,8%. Se a retrovisão não fosse realizada, um pólipo a cada 13,91 colonoscopias seria perdido (NNT=13,91). Não houve nenhum evento adverso. CONCLUSÃO: A técnica de retroflexão em cólon proximal mostrou-se segura, rápida e factível na maioria dos casos. Ela aumentou a taxa de detecção de adenomas e mostrou-se soberana neste estudo com benfeitorias além da dupla visão direta.


Subject(s)
Humans , Adolescent , Colonic Polyps/diagnostic imaging , Colonic Neoplasms/diagnostic imaging , Colonoscopy , Tertiary Care Centers
3.
Säo Paulo med. j ; 139(3): 218-225, May-June 2021. tab, graf
Article in English | LILACS | ID: biblio-1252250

ABSTRACT

ABSTRACT BACKGROUND: In July 2012, the Japan Gastroenterological Endoscopy Society updated their guidelines for gastroenterological endoscopy in patients receiving antithrombotic therapy. Colonoscopic polypectomy procedures are associated with a high risk of bleeding. OBJECTIVES: The present study evaluated the safety of colonoscopic polypectomy procedures in terms of bleeding, among patients receiving antithrombotic therapy. DESIGN AND SETTING: Prospective observational study conducted in a tertiary-level public cardiovascular hospital in Istanbul, Turkey. METHODS: Colonoscopic polypectomies carried out in a single endoscopy unit between July 2018 and July 2019 were evaluated prospectively. The patients' data, including age, gender, comorbidities, whether antithrombotic drug use was ceased or whether patients were switched to bridging therapy, polyp size, polyp type, polyp location, histopathology, resection methods (hot snare, cold snare or forceps) and complications relating to the procedures were recorded. RESULTS: The study was completed with 94 patients who underwent a total of 167 polypectomy procedures. As per the advice of the physicians who prescribed antithrombotic medications, 108 polypectomy procedures were performed on 60 patients without discontinuing medication and 59 polypectomy procedures were performed on 34 patients after discontinuing medication. The age, gender distribution and rate of bleeding did not differ significantly between the patients whose medication was discontinued and those whose medication was continued (P > 0.05). CONCLUSION: This study found that the colonoscopic polypectomy procedure without discontinuation of antithrombotic medication did not increase the risk of bleeding. This procedure can be safely performed by experienced endoscopists in patients with an international normalized ratio (INR) below 2.5.


Subject(s)
Humans , Colonic Polyps/surgery , Fibrinolytic Agents/adverse effects , Turkey , Retrospective Studies , Colonoscopy , Postoperative Hemorrhage/chemically induced , Postoperative Hemorrhage/epidemiology
5.
Arq. gastroenterol ; 57(4): 466-470, Oct.-Dec. 2020. tab, graf
Article in English | LILACS | ID: biblio-1142346

ABSTRACT

ABSTRACT BACKGROUND: The effectiveness of colonoscopy for colorectal cancer (CRC) screening depends on quality indicators, which adenoma detection rate (ADR) being the most important. Proximal serrated polyp detection rate (pSPDR) has been studied as a potential quality indicator for colonoscopy. OBJECTIVE: The aim is to analyze and compare the difference in ADR and pSPDR between patients undergoing screening colonoscopy and an unselected population with other indications for colonoscopy, including surveillance and diagnosis. METHODS: This is a historical cohort of patients who underwent colonoscopy in the digestive endoscopy service of a tertiary hospital. Out of 1554 colonoscopies performed, 573 patients were excluded. The remaining 981 patients were divided into two groups: patients undergoing screening colonoscopy (n=428; 43.6%); patients with other indications including surveillance and diagnosis (n=553; 56.4%). RESULTS: Adenoma detection rate of the group with other indications (50.6%) was higher than that of the screening group (44.6%; P=0.03). In regarding pSPDR, there was no difference between pSPDR in both groups (screening 13.6%; other indications 13.7%; P=0.931). There was no significant difference in the mean age (P=0.259) or in the proportion of men and women (P=0.211) between both groups. CONCLUSION: Proximal serrated polyp detection rate showed an insignificant difference between groups with different indications and could be used as a complementary indicator to adenoma detection rate. This could benefit colonoscopists with low colonoscopy volume or low volume of screening colonoscopies.


RESUMO CONTEXTO: A efetividade da colonoscopia no rastreamento do câncer colorretal (CCR) depende de indicadores de qualidade, sendo a taxa de detecção de adenoma (TDA) a mais importante. A taxa de detecção de pólipos serrilhados proximais (TDPSp) tem sido estudada como um potencial indicador de qualidade para a colonoscopia. OBJETIVO: O objetivo é analisar e comparar a diferença de TDA e TDPSp entre pacientes submetidos à colonoscopia de rastreamento e uma população não selecionada com outras indicações para colonoscopia, incluindo vigilância e diagnóstico. MÉTODOS: Esta é uma coorte histórica de pacientes submetidos à colonoscopia no serviço de endoscopia digestiva de um hospital terciário. Das 1554 colonoscopias realizadas, 573 pacientes foram excluídos. Os 981 pacientes restantes foram divididos em dois grupos: pacientes submetidos à colonoscopia de rastreamento (n=428; 43,6%); pacientes com outras indicações, incluindo vigilância e diagnóstico (n=553; 56,4%). RESULTADOS: A taxa de detecção de adenoma do grupo com outras indicações (50,6%) foi superior à do grupo de rastreamento (44,6%; P=0,03). Em relação ao TDPSp, não houve diferença entre os dois grupos (triagem 13,6%; outras indicações 13,7%; P=0,931). Não houve diferença significativa na idade média (P=0,259) ou na proporção de homens e mulheres (P=0,211) entre os grupos. CONCLUSÃO: A taxa de detecção proximal de pólipos serrilhados mostrou uma diferença insignificante entre os grupos com diferentes indicações para colonoscopia e poderia ser utilizada como um indicador complementar a TDA. Isso beneficiaria colonoscopistas com baixo volume de colonoscopias ou baixo volume de colonoscopias de rastreamento.


Subject(s)
Humans , Male , Female , Colorectal Neoplasms/diagnosis , Adenoma/diagnosis , Colonic Polyps/diagnosis , Retrospective Studies , Colonoscopy , Quality Indicators, Health Care , Early Detection of Cancer
6.
Rev. medica electron ; 42(4): 2008-2019, tab
Article in Spanish | LILACS, CUMED | ID: biblio-1139291

ABSTRACT

Resumen Introducción: los pólipos del colon son los tumores más comunes del tracto gastrointestinal. Se presentan relativamente frecuentes en niños. El método eficaz para su diagnóstico es la colonoscopia que permite su tratamiento mediante la polipectomía. Objetivo: determinar las características clínicas, endoscópicas e histológicas de los pólipos colorrectales, diagnosticados en niños atendidos en el Hospital Pediátrico Provincial "Eliseo Noel Caamaño", de la ciudad de Matanzas. Materiales y métodos: se realizó un estudio descriptivo, retrospectivo en niños diagnosticados con pólipos colorrectales y atendidos en el hospital. En el período comprendido del 2010 al 2018. Se estudiaron 141 pacientes menores de 18 años, con diagnóstico de pólipos por colonoscopia confirmado en el estudio histológico. Se excluyeron los pacientes con diagnósticos diferentes a pólipos y aquellos que no se pudieron estudiar histológicamente. Resultados: se observó mayor frecuencia de pacientes con pólipos en las edades entre 1 y 10 años (37,6 %), del sexo masculino (57,4 %). Los síntomas más frecuentes fueron el sangramiento digestivo bajo, (96,3 %) y prolapso de masa T por el recto, (27 %). Los pólipos estudiados se localizaron con mayor frecuencia en rectosigmoide (73, 4 %), predominando los pólipos únicos (78 %), pediculados (56,2 %), de 1-2 cm de tamaño (53,2 %). Histológicamente predominaron los pólipos juveniles, (62,1 %) seguidos de los inflamatorios (33 %). Conclusiones: los pólipos fueron más frecuentes en las edades de 1 y 10 años y en el sexo masculino. Se demostró la importancia de la colonoscopia en el diagnóstico precoz de estas lesiones (AU).


ABSTRACT Introduction: colon polyps are the most common tumors of the gastrointestinal tract. They are found relatively frequently in children. The efficacious method for their treatment is the colonoscopy, allowing their treatment through polypectomy. Objective: to determine the histological, endoscopic and clinical characteristics of colorectal polyps diagnosed in children who attended the Pediatric Provincial Hospital "Eliseo Noel Caamaño", of Matanzas. Materials and methods: a retrospective, descriptive study was carried out in children diagnosed with colorectal polyps in the hospital in the period from 2010 to 2018. 141 patients under 18 years-old were studied, all with diagnosis of polyps by colonoscopy confirmed in the histological study. The patients with different diagnosis but polyps were excluded, and also those who could not be histologically studied. Results: the highest frequency of patients with polyps was found in ages between 1 and 10 years (37,6 %), and the male sex (57.4 %). The most frequent symptoms were low digestive bleeding (96.3 %) and Mass T prolapse through the rectum (27 %). The studied polyps were more frequently located in the rectosigmoid (73.4 %). The single polyps predominated (78 %)m and the pedunculated ones (56.2 %) of 1-2 cm size (53.2 %). Histologically predominated young polyps (62.1 %), followed by the inflammatory ones (33 %). Conclusions: polyps were more frequent at the ages from 1 to 10 years and in the male sex. The authors showed the importance of colonoscopy in the precocious diagnosis of these lesions (AU).


Subject(s)
Humans , Male , Female , Child , Child , Colonic Polyps/epidemiology , Patients , Signs and Symptoms , Therapeutics/methods , Colonic Polyps/diagnosis , Colonic Polyps/pathology , Colonic Polyps/therapy , Colonoscopy/methods
7.
J. coloproctol. (Rio J., Impr.) ; 40(2): 149-155, Apr.-Jun. 2020. tab
Article in English | LILACS | ID: biblio-1134968

ABSTRACT

ABSTRACT Background: An inverse association between circulating vitamin D and adenoma risk hasbeen reported, but less is known about proximal inflammatory-hyperplastic polyps.Purpose: To investigate circulating 25(OH)D3and risk factors of proximal inflammatory-hyperplastic and adenoma colorectal polyps.Methods: From January 2017 to June 2019, consecutive asymptomatic average-risk partic-ipants undergoing initial screening colonoscopy. Questionnaires provided information oncolorectal polyp risk factors, and plasma samples were assayed for 25-Hydroxyvitamin-D ­25(OH)D3. The colorectal polyps were assessed, and medical history and demographic datawere obtained from each patient.Results: Of the 220 asymptomatic subjects, the prevalence of proximal inflammatory-hyperplastic polyps and adenoma polyps were 16.8%; 18.1% and 22.2%, respectively.Multivariate analysis revealed that low vitamin D (25(OH)D3< 18 ng/mL, OR = 3.94; 95%CI: 1.81­9.51) and current/former smoking (OR = 6.85; 95% CI: 2.98­15.70), high bodymass index (BMI > 24, OR = 5.32, 95% CI: 2.62­4.71) were independent predictors forproximal inflammatory-hyperplastic colorectal polyps (non-adenoma). Low vitamin D(25(OH)D3< 18 ng/mL, OR = 7.75; 95% CI: 3.19­18.80) and current/former smoking (OR = 3.75;95% CI: 1.30­10.81), age over 60 years old (OR = 2.38, 95% CI: 1.02­5.57), were independentpredictors for adenoma colorectal polyps.Conclusion: Low vitamin D and smoking are common risk factors for both adenomatous andproximal inflammatory hyperplastic polyps. Old age and BMI are additional risk factors forthe development of adenomatous and non-adenomatous colorectal polyps.


RESUMO Background: An inverse association between circulating vitamin D and adenoma risk hasbeen reported, but less is known about proximal inflammatory-hyperplastic polyps.Purpose: To investigate circulating 25(OH)D3and risk factors of proximal inflammatory-hyperplastic and adenoma colorectal polyps.Methods: From January 2017 to June 2019, consecutive asymptomatic average-risk partic-ipants undergoing initial screening colonoscopy. Questionnaires provided information oncolorectal polyp risk factors, and plasma samples were assayed for 25-Hydroxyvitamin-D ­25(OH)D3. The colorectal polyps were assessed, and medical history and demographic datawere obtained from each patient.Results: Of the 220 asymptomatic subjects, the prevalence of proximal inflammatory-hyperplastic polyps and adenoma polyps were 16.8%; 18.1% and 22.2%, respectively.Multivariate analysis revealed that low vitamin D (25(OH)D3< 18 ng/mL, OR = 3.94; 95%CI: 1.81­9.51) and current/former smoking (OR = 6.85; 95% CI: 2.98­15.70), high bodymass index (BMI > 24, OR = 5.32, 95% CI: 2.62­4.71) were independent predictors forproximal inflammatory-hyperplastic colorectal polyps (non-adenoma). Low vitamin D(25(OH)D3< 18 ng/mL, OR = 7.75; 95% CI: 3.19­18.80) and current/former smoking (OR = 3.75;95% CI: 1.30­10.81), age over 60 years old (OR = 2.38, 95% CI: 1.02­5.57), were independentpredictors for adenoma colorectal polyps.Conclusion: Low vitamin D and smoking are common risk factors for both adenomatous andproximal inflammatory hyperplastic polyps. Old age and BMI are additional risk factors forthe development of adenomatous and non-adenomatous colorectal polyps.


Subject(s)
Humans , Male , Female , Calcitriol , Adenoma/prevention & control , Colonic Polyps/prevention & control , Tobacco Use Disorder , Vitamin D , Colorectal Neoplasms/pathology , Risk Factors , Colonoscopy , Adenomatous Polyps/prevention & control
8.
ABCD arq. bras. cir. dig ; 33(1): e1500, 2020. tab
Article in English | LILACS | ID: biblio-1130516

ABSTRACT

ABSTRACT Background: One of the most important concerns on health is the increased rates of obesity in population and the speed in which this number is increasing. This number translates a serious public health problem, since it also increases the risk of several other diseases associated with obesity resulting in significant morbidity and mortality. Among them, it seems to be connected to several neoplasms, such as colorectal carcinoma. Aim: To evaluate the impact of obesity as a risk factor for colorectal carcinoma through the detection of adenoma, and to discuss the mechanisms that could establish a link between obesity and neoplasm. Methods: Patients who underwent colonoscopy were included. Personal and anthropometric data, clinical history, and results of the tests were analyzed in order to verify the correlation of BMI and the presence of adenomatous polyps. Results: A total of 142 patients were studied, which a mean age of 62 years. Of the patients, 74 (52.1%) were men and 68 (47.9%) were. Obesity was identified in 16.2% of the patients. Polyps were found in 61 (42.9%), mostly smaller than 1 cm. Obese individuals were 1.56 times more likely to present colorectal adenoma than patients with normal weight. Conclusion: This study, although showing the greater presence of colorectal adenomas in obese individuals, did not show a significant difference in the occurrence of pre-malignant lesions.


RESUMO Racional: Uma das grandes preocupações no âmbito da saúde é o crescente índice de obesidade na população e a velocidade com que esse número vem aumentando. Ele constitui grave problema de saúde pública, uma vez que aumenta também o risco de inúmeras doenças associadas à obesidade e que resultam em morbimortalidade significativa, como o câncer colorretal. Objetivo: Avaliar o impacto da obesidade como fator de risco para câncer colorretal, através da detecção de adenomas colorretais, e discutir os mecanismos que podem estabelecer uma ligação entre esta neoplasia e a obesidade. Métodos: Foram incluídos pacientes submetidos à colonoscopia. Dados pessoais e antropométricos, antecedentes clínicos e laudos dos exames foram analisados, a fim de verificar a correlação do IMC e a presença de pólipos adenomatosos. Resultados: Foram estudados 142 pacientes, 74 (52,1%) homens e 68 (47,9%) mulheres, com média de 62 anos. A obesidade foi identificada em 16,2% dos pacientes. Pólipos foram encontrados em 61 (42,9%), sendo em sua maioria menores do que 1 cm. Obesos tiveram probabilidade 1,56 vez maior de apresentar adenoma colorretal que pacientes com peso normal. Conclusão: Este estudo, apesar de mostrar a maior presença de adenomas colorretais em indivíduos obesos, não mostrou diferença estatisticamente significativa na ocorrência de lesões pré-malignas.


Subject(s)
Humans , Male , Female , Middle Aged , Colorectal Neoplasms/epidemiology , Adenoma/epidemiology , Colonic Polyps , Risk Factors , Colonoscopy , Adenomatous Polyps , Obesity
9.
Rev. colomb. gastroenterol ; 35(1): 25-32, 2020. tab, graf
Article in Spanish | LILACS | ID: biblio-1115598

ABSTRACT

Resumen Introducción: el cáncer de colon y recto (CCR) se origina a partir de pólipos adenomatosos y serrados. Por tanto, se recomienda que todos los pólipos colónicos sean resecados y enviados a patología. Sin embargo, en los pólipos diminutos (<5 mm) del recto y del sigmoides existe controversia sobre esta conducta, razón por la cual se ha planteado la estrategia de resecar y descartar o dejar in situ, a partir de la utilización de endoscopios avanzados (con una imagen de banda angosta [Narrow Band Imaging, NBI] u otras), y se logre concordancia con la histopatología, superior al 90 %. En nuestro medio, no hay estudios prospectivos con luz blanca sobre la prevalencia y las características histológicas de estos pólipos en el recto y el sigmoides. Por esta razón, se desarrolló este trabajo. Materiales y métodos: estudio de prevalencia analítica, prospectivo. Se incluyeron las colonoscopias de tamización realizadas en la Unidad de Gastroenterología de la Clínica Fundadores de Bogotá, entre enero y julio de 2018. Resultados: se incluyeron 719 pacientes. La prevalencia de pólipos diminutos en el recto y el sigmoides fue del 27 % (intervalo de confianza [IC], 95 %: 23,7-30,2 %). El 50 % eran pólipos adenomatosos, mientras que en 8 casos se presentó una displasia de alto grado (DAG). Entre los pólipos diminutos, 3 fueron tumores neuroendocrinos. No hubo cáncer en ninguna de las lesiones. Conclusiones: la mitad de los pólipos diminutos encontrados fueron adenomatosos y 8 (0,83 %) tuvieron DAG. Recomendamos resecar todos los pólipos diminutos hasta que los estudios locales realizados con NBI u otra tecnología demostrasen la capacidad para discriminar en más del 90 % los pólipos hiperplásicos (dejarlos in situ) o adenomatosos (resecarlos).


Abstract Introduction: Because colorectal cancer (CRC) originates from adenomatous and serrated polyps, it is recommended that all colonic polyps be resected and sent to pathology. However, there is controversy over this recommendation in the case of rectal and sigmoid polyps measuring less than 5 mm. Strategies using advanced NBI endoscopes to either "resect and discard" or leave "in situ" have been proposed. Concordance with histopathology of over 90% has been achieved. No prospective studies of the prevalence and histological characteristics of these rectal and sigmoid polyps had been done with white light in this country, so we undertook this study. Materials and methods: This is an analytical and prospective prevalence study. Screening colonoscopies performed in the gastroenterology unit of Clínica Fundadores in Bogotá between January and July 2018 were included. Results: Seven hundred nineteen patients were included. The prevalence of tiny polyps in the rectum and sigmoid colon was 27% (95% CI: 23.7 to 30.2%). Fifty percent were adenomatous, but eight cases had high grade dysplasia. Among the tiny polyps, three were neuroendocrine tumors. There was no cancer in any of the lesions. Conclusions: Half of the tiny polyps found were adenomatous, and eight (0.83%) had high grade dysplasia. We recommend resecting all tiny polyps until local studies conducted with NBI or other technology demonstrate the ability to discriminate between the more than 90% hyperplastic polyps (leaving them in situ) and adenomatous polyps (resect them).


Subject(s)
Humans , Male , Female , Middle Aged , Aged , Polyps , Colon, Sigmoid , Colonic Polyps , Prevalence , Colonoscopy , Adenomatous Polyps
10.
Arq. gastroenterol ; 56(4): 399-404, Oct.-Dec. 2019. tab, graf
Article in English | LILACS | ID: biblio-1055163

ABSTRACT

ABSTRACT BACKGROUND: Colorectal cancer (CRC) is one of the leading causes of cancer worldwide. Early diagnostic methods using serum biomarkers are required. The study of omics, most recently lipidomics, has the purpose of analyzing lipids for a better understanding of human lipidoma. The evolution of mass spectrometry methods, such as MALDI-MS technology, has enabled the detection and identification of a wide variety of lipids with great potential to open new avenues for predictive and preventive medicine. OBJECTIVE: To determine the lipid profile of patients with colorectal cancer and polyps. METHODS: Patients with stage I-III CRC, adenomatous polyps and individuals with normal colonoscopy were selected. All patients underwent peripheral blood collection for lipid extraction. The samples were analyzed by MALDI-MS technique for lipid identification. STATISTICAL ANALYSIS: Univariate and multivariate (principal component analysis [PCA] and discriminant analysis by partial least squares [PLS-DA]) analyses workflows were applied to the dataset, using MetaboAnalyst 3.0 software. The ions were identified according to the class of lipids using the online database Lipid Maps (http://www.lipidmaps.org). RESULTS: We included 88 individuals, 40 with CRC, 12 with polyps and 32 controls. Boxplot analysis showed eight VIP ions in the three groups. Differences were observed between the cancer and control groups, as well as between cancer and polyp, but not between polyps and control. The polyketide (810.1) was the lipid represented in cancer and overrepresented in polyp and control. Among the patients with CRC we observed differences between lipids with lymph node invasion (N1-2) compared to those without lymph node invasion (N). CONCLUSION: Possible lipid biomarkers were identified among cancer patients compared to control and polyp groups. The polyketide lipid (810.1) was the best biomarker to differentiate the cancer group from control and polyp. We found no difference between the biomarkers in the polyp group in relation to the control.


RESUMO CONTEXTO: O câncer colorretal (CCR) é, mundialmente, uma das principais causas de câncer. Métodos de diagnóstico precoce através de biomarcadores séricos são necessários. O estudo das ômicas, mais recentemente a lipidômica, tem a finalidade de analisar os lipídeos para melhor compreensão do lipidoma humano. A evolução dos métodos de espectrometria de massa, como a tecnologia por MALDI-MS, possibilitou a detecção e a identificação de uma ampla variedade de lipídeos com grande potencial para abrir novos caminhos para a medicina preditiva e preventiva. OBJETIVO: Determinar o perfil lipidômico de pacientes com câncer colorretal e pólipos. MÉTODOS: Foram selecionados pacientes com CCR estádio I-III, com pólipos adenomatosos e indivíduos com colonoscopia normal. Todos os pacientes foram submetidos a coleta do sangue periférico para extração do lipídeo. As amostras foram analisadas por técnica de MALDI-MS para a identificação dos lipídeos. ANÁLISE ESTATÍSTICA: Para análise univariada e multivariada foram utilizados a análise de componentes principais (PCA) e a análise discriminante pelos quadrados mínimos (PLS-DA). Os íons foram identificados de acordo com a classe de lipídeos usando-se o Lipid Maps (http://www.lipidmaps.org). RESULTADOS: Foram incluídos 88 indivíduos, 40 com CCR, 12 com pólipos e 32 controles. A análise de boxbolt evidenciou oito íons VIP nos três grupos. Observou-se diferenças entre os grupos câncer e controle, assim como entre câncer e pólipo, mas não entre pólipos e controle. O policetídeo (810,1) foi o lipídeo hipo-representado no câncer e hiperrepresentado no pólipo e controle. Entre os pacientes com CCR observamos diferenças entre os lipídeos com invasão linfonodal (N1-2) comparados aos sem invasão linfonodal (N0). CONCLUSÃO: Foram identificados possíveis biomarcadores lipídicos entre os pacientes com câncer comparados aos grupos controle e pólipo. O lipídeo policetídeo (810,1) foi o melhor biomarcador para diferenciar o grupo câncer do controle e pólipo. Não encontramos diferença entre os biomarcadores no grupo pólipo em relação ao controle.


Subject(s)
Humans , Male , Female , Adult , Aged , Aged, 80 and over , Colorectal Neoplasms/diagnosis , Colonic Polyps/diagnosis , Lipids/blood , Colorectal Neoplasms/blood , Biomarkers, Tumor/blood , Case-Control Studies , Colonic Polyps/blood , Colonoscopy , Early Detection of Cancer , Middle Aged , Neoplasm Staging
11.
Arq. gastroenterol ; 56(3): 276-279, July-Sept. 2019. tab, graf
Article in English | LILACS | ID: biblio-1038713

ABSTRACT

ABSTRACT BACKGROUND: Endoscopic mucosal resection is one of the most frequent therapeutic alternatives for large colorectal lateral spreading tumors. There are few data on the prevalence of synchronous lesions on these patients. OBJECTIVE: To describe the prevalence of synchronous colorectal lesions in patients referred for endoscopic mucosal resection of lateral spreading tumors >20 mm. METHODS: We reviewed the endoscopic database of our Department and identified adult patients who were referred for the resection of a colorectal lateral spreading tumor >20 mm and had a diagnostic colonoscopy performed up to six months before. The proportion of patients with at least one synchronous lesion was estimated. The following features were compared between patients with and without synchronous lesions: age, gender, bowel preparation quality and cecal intubation on index colonoscopy and therapeutic colonoscopy, serrated adenoma as index lesion. RESULTS: From December 2016 to November 2017, we identified 70 patients who fulfilled inclusion criteria. Median size of lesions was 25 mm (20-45). Eighty percent were located in the right colon and 35.71% were serrated adenomas. Synchronous lesion rate was 38.57%. Bowel preparation quality was similar in both groups when comparing both index and therapeutic colonoscopies. Patients with synchronous lesions had a higher proportion of serrated adenoma as index lesion than patients without synchronous lesions [51.85% vs 25.58%, OR 3.13 (1.13-8.68), P=0.03]. CONCLUSION: We found a high prevalence of synchronous lesions among patients with a large colorectal lateral spreading tumor. This risk seems to be increased if index lesions are serrated adenomas.


DESCRITORES CONTEXTO: A ressecção endoscópica de mucosa é uma das alternativas terapêuticas frequentes para grandes tumores colorretais de propagação lateral. Há poucos dados sobre a prevalência de lesões síncronas nesses pacientes. OBJETIVO: Descrever a prevalência de lesões colorretais síncronas em pacientes encaminhados para ressecção endoscópica da mucosa de tumores de disseminação lateral >20 mm. MÉTODOS: Realizou-se a revisão de banco de dados endoscópicos de nosso departamento e foram identificados pacientes adultos encaminhados para a ressecção de um tumor colorretal com propagação lateral >20 mm e que tiveram colonoscopia diagnóstica realizada até seis meses antes. Estimou-se a proporção de pacientes com pelo menos uma lesão síncrona. As seguintes características foram comparadas entre pacientes com e sem lesões síncronas: idade, sexo, qualidade da preparação intestinal e intubação cecal pelo índice de colonoscopia e adenoma serrilhado como lesão índice. RESULTADOS: De dezembro de 2016 a novembro de 2017, identificamos 70 pacientes que preencheram os critérios de inclusão. O tamanho mediano das lesões foi de 25 mm (20-45). Foram 80% situados no cólon direito e 35,71% eram adenomas serrilhados. A taxa de lesão síncrona foi de 38,57%. A qualidade da preparação intestinal foi semelhante em ambos os grupos comparando-se os índices e colonoscopia terapêutica. Pacientes com lesões síncronas apresentaram maior proporção de adenoma serrilhado como lesão índice do que pacientes sem lesões síncronas [51,85% vs 25,58%, or 3,13 (1,13-8,68), P=0,03]. CONCLUSÃO: Encontramos alta prevalência de lesões síncronas entre pacientes com grande tumor de propagação lateral colorretal. Este risco parece ser aumentado se as lesões índice forem adenomas serrilhados.


Subject(s)
Humans , Male , Female , Adult , Aged , Colorectal Neoplasms/surgery , Adenoma/surgery , Colonoscopy/methods , Endoscopic Mucosal Resection/methods , Colorectal Neoplasms/pathology , Adenoma/pathology , Colonic Polyps/surgery , Middle Aged
12.
Arq. gastroenterol ; 56(2): 141-145, Apr.-June 2019. tab, graf
Article in English | LILACS | ID: biblio-1019456

ABSTRACT

ABSTRACT BACKGROUND: Colorectal cancer is one of the most commonly diagnosed cancers around the world. One of the factors involved in the development of colorectal cancer is the changes in the normal flora of the intestine. OBJECTIVE: In this study, the mean copy number of Enterococcus faecalis in people with polyps and people with colorectal cancer has been evaluated in comparison with healthy controls. METHODS: In this study, 25 patients with colorectal cancer and 28 patients with intestinal polyps were selected and stool specimens were taken. In addition, 24 healthy individuals were selected as control group. Extraction of bacterial DNA from the stool sample were performed. The molecular methods of PCR for confirmation of standard strain and absolute Real Time PCR (qRT-PCR) method were used to evaluate the number of Enterococcus faecalis in the studied groups. RESULTS: The results of this study indicate that the mean copy number of Enterococcus faecalis in patients with colorectal cancer was 11.2x109 per gram of stool, and in patients with polyps was 9.4x108 per gram of stool. In healthy people, this number was 9x108 per gram of stool. There was a significant difference between the implicit copy numbers in the three groups. (P<0.05). CONCLUSION: Enterococcus faecalis in faecal flora of people with colorectal cancer was significantly higher than those with polyps and healthy people. This could potentially signify the ability of this bacterium to induce colorectal cancer. More studies are needed to prove this theory.


RESUMO CONTEXTO: O câncer colorretal é um dos cânceres mais comumente diagnosticados em todo o mundo. Um dos fatores envolvidos no desenvolvimento do câncer colorretal é a mudança na flora normal do intestino. OBJETIVO: O número médio de cópias de Enterococcus faecalis em pessoas com pólipos e pessoas com câncer colorretal foram avaliados em comparação com controles saudáveis. MÉTODOS: Neste estudo, 25 pacientes com câncer colorretal e 28 pacientes com pólipos intestinais foram selecionados e amostras de fezes foram adquiridas. Além disso, 24 indivíduos saudáveis foram selecionados como grupo controle. A extração do DNA bacteriano da amostra coletada foi executada. Os métodos moleculares de PCR para confirmação da cepa padrão e o método absoluto de PCR em tempo real (qRT-PCR) foram utilizados para avaliar o número de Enterococcus faecalis nos grupos estudados. RESULTADOS: Os resultados deste estudo indicam que o número médio de cópias de Enterococcus faecalis em pacientes com câncer colorretal foi de 11,2x109 por grama de fezes, e em pacientes com pólipos foi de 9,4x108 por grama de fezes. Em pessoas saudáveis, este número foi de 9x108 por grama de fezes. Houve diferença significativa entre os números de cópia implícita nos três grupos. (P<0,05). CONCLUSÃO: Enterococcus faecalis na flora fecal de pessoas com câncer colorretal foi significativamente maior do que aqueles com pólipos e pessoas saudáveis. Isto poderia potencialmente significar a capacidade desta bactéria para induzir o câncer colorretal. Mais estudos são necessários para provar esta teoria.


Subject(s)
Humans , Male , Female , Aged , Colorectal Neoplasms/microbiology , Colonic Polyps/microbiology , Enterococcus faecalis/isolation & purification , Feces/microbiology , DNA, Bacterial/analysis , Case-Control Studies , Enterococcus faecalis/genetics , Real-Time Polymerase Chain Reaction , Middle Aged
13.
Arq. gastroenterol ; 56(2): 191-196, Apr.-June 2019. tab, graf
Article in English | LILACS | ID: biblio-1019453

ABSTRACT

ABSTRACT BACKGROUND: Colorectal cancer is one of the most prevalent pathologies. Its prognosis is linked to the early detection and treatment. Currently diagnosis is performed by histological analysis from polyp biopsies, followed by morphological classification. Kudo's pit pattern classification is frequently used for the differentiation of neoplastic colorectal lesions using hematoxylin-eosin stained samples. Few articles have reported this classification with image software processing, using exogenous markers over the samples. The processing of autofluorescence images is an alternative that could allow the characterization of the pits from the crypts of Lieberkühn, bypassing staining techniques. OBJECTIVE: Processing and analysis of widefield autofluorescence microscopy images obtained by fresh colon tissue samples from a murine model of colorectal cancer in order to quantify and characterize the pits morphology by measuring morphology parameters and shape descriptors. METHODS: Adult male BALB/cCmedc strain mice (n=27), ranging from 20 to 30 g, were randomly assigned to four and five groups of treated and control animals. Colon samples were collected at day zero and at fourth, eighth, sixteenth and twentieth weeks after treatmentwith azoxymethane. Two-dimensional (2D) segmentation, quantification and morphological characterization of pits by image processing applied using macro programming from FIJI. RESULTS: Type I is the pit morphology prevailing between 53 and 81% in control group weeks. III-L and III-S types were detected in reduced percentages. Between the 33 and 56% of type I was stated as the prevailing morphology for the 4th, 8th and 20th weeks of treated groups, followed by III-L type. For the 16th week, the 39% of the pits was characterized as III-L type, followed by type I. Further, pattern types as IV, III-S and II were also found mainly in that order for almost all of the treated weeks. CONCLUSION: These preliminaries outcomes could be considered an advance in two-dimensional pit characterization as the whole image processing, comparing to the conventional procedure, takes a few seconds to quantify and characterize non-pathological colon pits as well as to estimate early pathological stages of colorectal cancer.


RESUMO CONTEXTO: O câncer colorretal é uma das patologias mais prevalentes. Seu prognóstico é ligado à detenção e ao tratamento precoces. Atualmente o diagnóstico é realizado por análise histológica de biópsias de pólipo, seguida de classificação morfológica. A classificação de padrões de Kudo é frequentemente utilizada para a diferenciação de lesões colorretais neoplásicas usando amostras coradas por hematoxilina-eosina. Poucos artigos relatam esta classificação com utilização de processamento por software de imagem, utilizando marcadores exógenos sobre as amostras. O processamento de imagens de autofluorescência é uma alternativa que pode permitir a caracterização do padrão das criptas de Lieberkühn, contornando técnicas de coloração. OBJETIVO: Analisar, quantificar e caracterizar a morfologia do padrão das criptas medindo os parâmetros morfológicos e descritores de forma, através do processamento e análise de imagens de microscopia de autofluorescência de campo de Widefield obtidas em amostras de tecido de cólon fresco a partir de um modelo murino de câncer colorretal. MÉTODOS: Camundongos machos adultos BALB/cCmedc (n=27), variando de 20 a 30 g, foram distribuídos aleatoriamente em quatro e cinco grupos de animais tratados e de controle. As amostras de cólon foram coletadas no dia zero e na 4ª, 8ª, 16ª e 20ª semanas após o tratamento com azoxometano. Segmentação bidimensional (2D), quantificação e caracterização morfológica do padrão das criptas por processamento de imagem aplicados utilizando programação macro de FIJI. RESULTADOS: O tipo I é a morfologia da cripta prevalente entre 53% e 81% semanas do grupo controle. Os tipos III-L e III-S foram detectados em porcentagens reduzidas. A morfologia do tipo I entre os 33% e 56% foi constatada como a predominante para as 4ª, 8ª e 20ª semanas de grupos tratados, seguidos pelo tipo III-L. Para a 16ª semana, os 39% dos padrões das criptas foram caracterizados como tipo III-L, seguidos pelo tipo I. Além disso, os tipos de padrão como IV, III-S e II também foram encontrados principalmente nessa ordem para quase todas as semanas tratadas. CONCLUSÃO: Estes resultados preliminares podem ser considerados um avanço na caracterização bidimensional da cripta como um processamento integral da imagem, comparando-se ao procedimento convencional; demora-se alguns segundos a mais para quantificar e caracterizar pontos não-patológicos, bem como para estimar estágios patológicos precoces do câncer colorretal.


Subject(s)
Animals , Male , Colorectal Neoplasms/diagnostic imaging , Colonic Polyps/diagnostic imaging , Microscopy, Fluorescence , Colorectal Neoplasms/pathology , Colonic Polyps/pathology , Disease Models, Animal , Mice, Inbred BALB C
14.
J. coloproctol. (Rio J., Impr.) ; 39(2): 121-126, Apr.-June 2019. tab, ilus
Article in English | LILACS | ID: biblio-1012590

ABSTRACT

ABSTRACT Globally, colorectal cancer is the third leading cause of cancer death among men and the second among women, corresponding to about 10% of all cancers. The Brazilian Ministry of Health and National Cancer Institute recommend the screening of colorectal cancer for people over 50 years-old with Fecal Occult Blood Test. Endoscopy is limited to patients with positive screening results. The aim of this study is to evaluate the incidence of malignant or premalignant lesions diagnosed by endoscopy in patients with positive or negative Fecal Occult Blood Test and assess the efficacy of Fecal Occult Blood Test to predict the finding of a malignant colorectal lesion. We carried out a cross-sectional study among patients with a Fecal Occult Blood Test result that were submitted to colonoscopy, in the same hospital, from March 2016 to July 2017. Sensitivity, specificity, positive and negative predictive value of Fecal Occult Blood Test compared to colonoscopy neoplastic findings was calculated. The total of 92 patients were enrolled, 52 (56.5%) were female, Fecal Occult Blood Test was positive in 42.4% of them and in 41 (44.6%) the colonoscopy showed abnormal findings. Polyps were the most frequent alteration, found in 20 patients (21.7%). Among the patients with polyps, 15 (16.3%) had neoplastic and 5 (5.4%) presented non-neoplastic polyps. The Fecal Occult Blood Test sensitivity for detection of neoplastic polyps was 66.7%, specificity 62.3%, positive predictive value 11% and negative predictive value was 94.2%. Considering the need for a screening method, Fecal Occult Blood Test showed to be an effective and reliable screening test that can be applied in public health programs to detect and prevent colorectal cancer.


RESUMO Globalmente, o carcinoma colorretal é a terceira principal causa de morte por neoplasia entre homens e a segunda entre mulheres, correspondendo a 10% de todas as neoplasias. O Ministério da Saúde Brasileiro e o Instituto Nacional do Câncer recomendam a triagem do câncer colorretal para indivíduos acima de 50 anos, utilizando a Pesquisa de Sangue Oculto nas fezes. A endoscopia é reservada para aqueles com Pesquisa de Sangue Oculto nas fezes positiva. O objetivo deste estudo é avaliar a incidência de lesões malignas/pré-malignas diagnósticas na colonoscopia e correlacionar com os resultados prévios da Pesquisa de Sangue Oculto e verificar a eficácia da Pesquisa de Sangue Oculto para predizer uma lesão colorretal maligna. Realizamos um estudo transversal em pacientes que apresentavam resultados positivos ou negativos de Pesquisa de Sangue Oculto nas fezes e foram submetidos à colonoscopia, na mesma instituição, entre março de 2016 e julho de 2017. Dos 92 participantes; 52 (56,5%) eram do sexo feminino, a Pesquisa de Sangue Oculto nas fezes foi positiva em 42,4%; e em 41 (44,6%) a colonoscopia mostrou alterações. Em 20 pacientes (21,7%) havia pólipos; 15 (16,3%) eram neoplásicos e 5 (5,4%) não neoplásicos. A sensibilidade da Pesquisa de Sangue Oculto nas fezes para detecção de pólipos neoplásicos foi 66,7%; a especificidade 62,3%; o valor preditivo positivo 11% e o valor preditivo negativo 94,2%. Considerando a necessidade de um método de triagem, a Pesquisa de Sangue Oculto nas fezes mostrou ser um exame de triagem eficaz e confiável para ser aplicado em programas de saúde pública com o objetivo de detectar e prevenir o carcinoma colorretal.


Subject(s)
Humans , Male , Female , Colorectal Neoplasms/pathology , Colonic Diseases , Occult Blood , Adenocarcinoma , Adenoma , Colonic Polyps , Triage , Colonoscopy
15.
Rev. colomb. gastroenterol ; 34(1): 31-37, ene.-mar. 2019. tab, graf
Article in Spanish | LILACS | ID: biblio-1003835

ABSTRACT

Resumen El cáncer colorrectal es una de las causas de mortalidad más importantes en los países occidentales. Desde cuando se estableció la progresión de adenoma a carcinoma, se ha considerado que los pólipos del colon son un factor de riesgo importante para desarrollar el cáncer colorrectal, por esta razón es importante el conocimiento, detección y resección, e investigación del tema. En Colombia no se han realizado estudios prospectivos que evalúen las características de los pólipos colorrectales, razón por la cual se considera de gran importancia la realización de este estudio con el objetivo de determinar las características endoscópicas e histopatológicas de los pólipos colónicos encontrados y resecados mediante colonoscopia. Se realizó un estudio observacional descriptivo, mediante el análisis de los pólipos resecados en pacientes del servicio de gastroenterología y endoscopia digestiva de la Clínica Universitaria Colombia. Se calculó un tamaño de muestra de forma probabilística (n = 306 pólipos resecados). En cuanto a la histología, y contrario a lo informado en la literatura, la mayoría de los pólipos detectados en nuestro estudio (170) fue de tipo adenomatoso (55,6 %). El mayor porcentaje de ellos (86 %) correspondió al tipo tubular, hallazgo acorde con lo mencionado en la literatura, la mayoría de ellos con displasia de bajo grado. Solo en 2 de nuestros pacientes se realizó el hallazgo de pólipos cuya histología diagnosticó la presencia de adenocarcinoma.


Abstract Colorectal cancer is one of the most important causes of death in Western countries. Since the progression from adenoma to carcinoma was established, it has been considered that colon polyps are an important risk factor for development of colorectal cancer, hence the importance of knowledge and research about them as well as their detection and resection. In our country there had been no prospective evaluations of the characteristics of colorectal polyps, so we considered this study to determine the endoscopic and histopathological characteristics of colonic polyps found and resected through colonoscopy to be of great importance. This descriptive and observational study includes analysis of polyps resected from patients inthe Gastroenterology and Digestive Endoscopy service of the Clínica Universitaria Colombia. Sample size was calculated probabilistically (n = 306 resected polyps). Contrary to reports in the literature, most of the polyps detected in our study (170) were adenomatous (55.6%). The highest percentage (86%) were tubular which is consistent with the literature. Most of them had low grade dysplasia. Only two of our patients had polyps found whose histology indicated adenocarcinoma.


Subject(s)
Humans , Colorectal Neoplasms , Colonic Polyps , Histology , Patients , Prospective Studies , Colonoscopy , Knowledge
16.
Article in English | WPRIM | ID: wpr-719284

ABSTRACT

BACKGROUND/AIMS: There are few comparative studies on the historical changes in the clinicopathologic characteristics of colorectal polyps in Korea. This retrospective study compared the clinicopathologic characteristics of colorectal polyps treated at our institution in 2002 and 2012. METHODS: The medical records of 1,816 patients who underwent colonoscopy and were found to have colorectal polyps in 2002 (n = 597) or 2012 (n = 1,219) were reviewed retrospectively. Patient characteristics and polyp sizes, gross morphologies, locations, and pathologic results were analyzed and compared. RESULTS: Mean age was older in the 2002 group than in the 2012 group (67.3 ± 11.1 years vs. 55.4 ± 10.8 years, p < 0.001). The 1,816 study subjects had a total of 3,723 colorectal polyps, with a mean of 2.05 polyps per patient. Mean polyp size was larger in the 2002 group than in the 2012 group (0.6 ± 0.4 cm vs. 0.4 ± 0.3 cm, p < 0.001). The most common histology was tubular adenoma and they were more common in the right colon in both study groups. Although the distribution of total adenoma was not significantly different between groups, the location of advanced adenoma differed significantly and was more common in the right colon in the 2012 group (30.4% vs. 63.2%, p = 0.01). CONCLUSIONS: No significant change in total polyps and adenoma distribution was found between 2002 and 2012. However, advanced adenoma was more common in the right colon in 2012, which cautiously suggests a locational shift from the left to right colon. These findings indicate that right colon polyps require more attention.


Subject(s)
Adenoma , Colon , Colonic Polyps , Colonoscopy , Humans , Korea , Medical Records , Polyps , Retrospective Studies
17.
Article in English | WPRIM | ID: wpr-762715

ABSTRACT

PURPOSE: This study aimed to validate an automated calculating system developed for determining the adenoma detection rate (ADR). METHODS: To calculate the automated ADR, the data linking processes were as follows: (1) matching the selected colonoscopy results with the pathological results, (2) matching the polyp number from colonoscopy with that from pathology and confirming the histopathological results of each colonic polyp, and (3) confirming the histopathological results, especially the adenoma status of each colonic polyp. To verify the accuracy of the automated ADR calculating system, we manually calculated the ADR for 3 months through medical record review. Accuracy was calculated by measuring the error rate for each value. The cause of error was analyzed by additional order and chart review. RESULTS: After excluding 318 cases, 2,543 patients (1,351 men and 1,192 women; median age, 57.9 years) who underwent colonoscopy were included in this study. When the automated calculating system was used, polyps were found in 1,336 cases (52.6%) and adenomas were found in 1,003 cases (39.4%). When the manual calculating system was used, polyps were found in 1,327 cases (52.2%) and adenomas were found in 1,003 cases (39.4%). The accuracies of the polyp detection rate and ADR according to the automated calculating system were 99.3% and 100%, respectively. CONCLUSION: We developed a system to automatically calculate the ADR by extracting hospital electronic medical record results and verified that it provided satisfactory results. It may help to improve colonoscopy quality.


Subject(s)
Adenoma , Colon , Colonic Polyps , Colonoscopy , Colorectal Neoplasms , Electronic Health Records , Female , Humans , Male , Medical Records , Pathology , Polyps , Quality Improvement
18.
Laboratory Medicine Online ; : 146-152, 2019.
Article in English | WPRIM | ID: wpr-760502

ABSTRACT

BACKGROUND: Although routine screening of carcinoembryonic antigen (CEA) is not recommended for the early diagnosis of colorectal cancers, CEA levels are frequently measured in practice and during opportunistic health screening programs. We evaluated the frequency of false-positive results according to CEA level at a health screening center. METHODS: The medical records of 25,786 participants who underwent a general health check-up and CEA testing at the Seoul National University Hospital Healthcare System Gangnam Center from March 2015 to February 2016 were reviewed. CEA levels were measured using the Architect i2000sr (Abbott Laboratories, USA). The cut-off level for elevated CEA was 5.0 ng/mL. RESULTS: Among 25,786 participants who underwent CEA screening, 597 (2.3%) had CEA levels >5.0 ng/mL. Among 597 participants with elevated CEA levels, 12 (2.0%) had actual malignancies with CEA levels of 8.3–155.3 ng/mL. Diabetes, smoking, chronic obstructive pulmonary disease, and colonic polyps were considered as causes of false elevation. The false-positive rates of CEA according to level were as follows: 5.1–10.0 ng/mL, 99.5%; 10.1–15.0 ng/mL, 87.2%; 15.1–20.0 ng/mL, 100.0%; >20.0 ng/mL, 33.3%. A subsequent decrease in the CEA level after a 1-month follow-up was observed in 47.6% of all cases with elevated CEA levels. CONCLUSIONS: False elevation in CEA levels in the range of 5.0–20.0 ng/mL is common in patients who underwent testing at a health screening center. False-positive results above 20.0 ng/mL are less common. These data could provide a guide for the interpretation of elevated CEA level at a health screening center.


Subject(s)
Biomarkers , Carcinoembryonic Antigen , Colonic Polyps , Colorectal Neoplasms , Delivery of Health Care , Early Diagnosis , Follow-Up Studies , Humans , Mass Screening , Medical Records , Pulmonary Disease, Chronic Obstructive , Seoul , Smoke , Smoking
19.
Article in Korean | WPRIM | ID: wpr-787467

ABSTRACT

BACKGROUND: Colon cancer is one of the main causes of mortality. Early adenomatous colon polyp is a precursor of colon cancer through the ‘adenomacarcinoma sequence.’ Epidemiological studies suggest that the neutrophil to lymphocyte ratio can be one of useful inflammatory markers in clinical settings. This study aimed to evaluate the association between neutrophil to lymphocyte ratio and development of early adenomatous colon polyps.METHODS: This cross-sectional study retrospectively examined 960 middle-aged and elderly individuals aged ≥45 years who underwent colonoscopy in a health examination program. Multivariate logistic regression was used to analyze the association between neutrophil to lymphocyte ratio and development of early adenomatous colon polyps.RESULTS: Among the 960 subjects, the prevalence of early adenomatous polyps was 20.7% (n=199). The mean age, body mass index, number of current smokers, white blood cell count, triglyceride level, and number of subjects receiving hypolipidemic drugs were higher in the group with early adenomatous polyps than in the multivariate analysis, the odds ratio (95% confidence interval) for the development of early adenomatous polyps was 1.23 (1.01–1.50) with neutrophil to lymphocyte ratio increment after adjusting the confounding variables (P=0.037).CONCLUSION: We found that the neutrophil to lymphocyte ratio was associated with the development of early adenomatous colon polyps among middle-aged and elderly individuals. Accordingly, this result suggests that regular monitoring of early adenomatous colon polyps may be useful among individuals with a higher neutrophil to lymphocyte ratio.


Subject(s)
Adenomatous Polyps , Aged , Body Mass Index , Colon , Colonic Neoplasms , Colonic Polyps , Colonoscopy , Cross-Sectional Studies , Epidemiologic Studies , Humans , Hypolipidemic Agents , Korea , Leukocyte Count , Logistic Models , Lymphocytes , Middle Aged , Mortality , Multivariate Analysis , Neutrophils , Odds Ratio , Polyps , Prevalence , Retrospective Studies , Triglycerides
20.
Article in English | WPRIM | ID: wpr-787225

ABSTRACT

BACKGROUND/AIMS: Bleeding is one of the major complications of a colorectal polypectomy. The aim of this study was to identify the risk of delayed bleeding, particularly after a colorectal endoscopic mucosal resection (EMR) without prophylactic clipping.METHODS: Between April 2014 and August 2014, patients who underwent colorectal EMR (≥6 mm and < 2 cm) without prophylactic clipping were included. This study evaluated the incidence of delayed bleeding and the associated factors after colorectal EMR without prophylactic clipping.RESULTS: A total of 717 colorectal polyps (≥6 mm and < 2 cm) of 243 patients resected by colorectal EMR in the study period were evaluated. The mean age of the patients was 63 years; 165 patients were men and 78 patients were women. The mean polyp size removed by colorectal EMR was 9.0 mm (range 6.0–19.0), and the number of polyps larger than 1 cm was 212 (29.6%). Delayed bleeding after colorectal EMR occurred in 12 polyps (1.7%) in eight patients (3.3%), and there were no significant risk factors affecting delayed bleeding.CONCLUSIONS: This study identified that the incidence of delayed bleeding on colorectal polyps (≥6 mm and < 2 cm) after EMR without prophylactic clipping was 3.3%, but no significant risk factors affecting delayed bleeding were found.


Subject(s)
Colonic Polyps , Female , Hemorrhage , Humans , Incidence , Male , Observational Study , Polyps , Risk Factors
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