RESUMO
Helicobacter species may cause chronic inflammation of the biliary tract, but its relationship with cancer is controversial. We performed a systematic review and meta-analysis to evaluate the association between Helicobacter species and hepatobiliary tract malignancies. Twenty-six studies (4083 patients) were included in qualitative synthesis, and 18 studies (n = 1895 qualified for meta-analysis. All studies were at high-intermediate risk of bias. Most studies combined several direct microbiological methods, mostly PCR (23 studies), culture (8 studies), and/or CLOtest (5 studies). Different specimens alone or in combination were investigated, most frequently bile (16 studies), serum (7 studies), liver/biliary tissue (8 studies), and gastric tissue (3 studies). Patients with Helicobacter species infection had an increased risk of hepatobiliary tract malignancies (OR = 3.61 [95% CI 2.18-6.00]; p < 0.0001), with high heterogeneity in the analysis (I2 = 61%; p = 0.0003). This effect was consistent when Helicobacter was assessed in bile (OR = 3.57 [95% CI 1.73-7.39]; p = 0.0006), gastric tissue (OR = 42.63 [95% CI 5.25-346.24]; p = 0.0004), liver/biliary tissue (OR = 4.92 [95% CI 1.90-12.76]; p = 0.001) and serum (OR = 1.38 [95% CI 1.00-1.90]; p = 0.05). Heterogeneity was reduced in these sub-analyses (I2 = 0-27%; p = ns), except for liver/biliary tissue (I2 = 57%; p = 0.02). In conclusion, based on low-certainty data, Helicobacter species chronic infection is associated with a tripled risk of hepatobiliary tract malignancy. Prospective studies are required to delineate public health interventions.
RESUMO
INTRODUCTION AND AIMS: A high quality colonoscopy is key in preventing colorectal cancer, but the risk of colorectal cancer (CRC) exists. The aims of the study were to investigate the incidence, characteristics and predictive factors of post-colonoscopy colorectal cancer (PCCRC). MATERIAL AND METHOD: A retrospective and prospective observational study was designed. A population undergoing colonoscopy between 1-01-1997 and 31-12-2014 was included. We analysed demographic variables, characteristics of the diagnostic colonoscopy of CRC, of the previous ones and the lesions found in them. To compare the PCCRC group versus the CRC group without previous colonoscopy, the Student's t-test and multiple logistic regression were used to determine predictive factors of PCCRC (SPSS® 15). The statistical significance was P<.05. RESULTS: A total of 56,984 colonoscopies, 1,977 CRC and 132 patients (mean 70.8 years old, 56.8% male) with at least one colonoscopy in 10 years before were registered (PCCRC). Seventy and a half percent of the previous colonoscopies were completed and 63.7% had an adequate bowel preparation. Predictive factors of PCCRC were personal history of polyps (OR 35.01; 95% CI 11.1-110.8; P<.001), previous CRC (OR 176.64; 95% CI 51.5-606.1); P<.001), family history of CRC (OR 3.14; 95% CI 1.5-6.4); P=.002) and proximal CRC (OR 3.15; 95% CI 2.1-4.9; P<.001). CONCLUSIONS: PCCRC rate in 10 years was 6.7%. An adequate follow-up and a high-quality colonoscopy could prevent PCCRC, especially in patients with risk factors.
Assuntos
Adenocarcinoma/diagnóstico por imagem , Adenocarcinoma/epidemiologia , Colonoscopia , Neoplasias Colorretais/diagnóstico por imagem , Neoplasias Colorretais/epidemiologia , Adenocarcinoma/prevenção & controle , Adulto , Assistência ao Convalescente , Idoso , Idoso de 80 Anos ou mais , Neoplasias Colorretais/prevenção & controle , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Fatores de Risco , Espanha/epidemiologiaRESUMO
BACKGROUND: The ideal length of treatment with thiopurines in patients with ulcerative colitis (UC) in sustained remission remains unknown. It is widely accepted that the drug withdrawal is associated with a worse outcome. The aim of this study was to analyze the outcome after this withdrawal and to identify predictors of relapse. METHODS: A multicenter and retrospective study was designed. A total of 102 patients with UC who discontinued thiopurines in a situation of sustained remission were included. All the patients were followed up until last revision or until relapse (understood as the occurrence of signs and symptoms of UC that required a rescue treatment). RESULTS: After thiopurines withdrawal, overall relapse was recorded in 32.35% of the patients: 18.88% in the first year, 36.48% in the third, and 43.04% in the fifth year after withdrawal. On multivariate analysis, predictors of relapse were the time from diagnosis of UC until the starting of thiopurines (hazard ratio [HR], 1.01; 95% confidence interval [CI], 1.01-1.02; P = 0.039), the number of relapses before the withdrawal (HR, 1.3; 95% CI, 1.01-1.66; P = 0.029), pancolitis (HR, 5.01; 95% CI, 1.95-26.43; P = 0.028), the duration of treatment with thiopurines (HR, 0.15; 95% CI, 0.03-0.66; P = 0.013) and the situation of biological remission at withdrawal (HR, 0.004; 95% CI, 0.0001-0.14; P = 0.002). CONCLUSIONS: The withdrawal of thiopurines in patients with UC, although in sustained remission, is related to a high relapse rate. Clinical variables such as the extent of the disease, the duration of treatment or time from diagnosis to the start of thiopurines should be considered before stopping these drugs.