Objective: To analyze the factors affecting lymph node metastasis and the prognosis of rectal neuroendocrine tumors after surgical treatment. Methods: A retrospective analysis was conducted using the clinical data from 156 cases of rectal neuroendocrine tumors during the period of January 1999 to December 2013. The Kaplan-Meier method was used to calculate the survival time, Cox regression analysis was performed for statistical analysis of clinicopathological factors that may be associated with lymph node metastasis and prognosis, and correlation analysis was carried out using binary logistic regression. Results: The overall 5-year survival rate of the entire group was 95.7%. Multivariate analysis showed that the depth of invasion was an independent prognostic factor (P < 0.001). The incidence of lymph node metastasis was 7.7% (12/156), and logistic regression analysis showed that lymph node metastasis was related to the depth of invasion (P = 0.003) and tumor diameter (P = 0.006). Conclusion: The surgical approach of rectal neuroendocrine tumors should be selected based on a comprehensive consideration of factors such as tumor size, depth of invasion and lymph node metastasis. 相似文献
Objective: To do a systematic review using meta-analysis to assess the diagnostic accuracy of fecal lactoferrin (FL) in patients with inflammatory bowel disease (IBD). Methods: We performed a literature review and systematically searched the Medline and EMBASE databases for eligible studies. The quality of the included studies was assessed using the QUADAS tool. The sensitivity, specificity, and other diagnostic indexes of FL were pooled using a random-effects model. Results: Seven studies, involving 1816 patients, met the inclusion criteria. In all studies, the pooled FL sensitivity and pooled specificity were 0.82 (95% confidence interval [CI]: 0.72, 0.89) and 0.95 (95% CI: 0.88, 0.98), respectively. The positive and negative likelihood ratios were 16.63 and 0.18, respectively. The area under the summary receiver-operating characteristic curve (SROC) was 0.95 (95% CI: 0.93, 0.97), and the diagnostic odds ratio was 90.04 (95% CI: 37.01, 219.02). The pooled FL sensitivity and specificity for Crohn’s disease (CD) diagnosis (sensitivity =75%, specificity =100%) was not as good as it was for ulcerative colitis (UC) diagnosis (sensitivity =82%, specificity =100%). Conclusion: FL, as a noninvasive and screening marker, has a high specificity and a modest specificity during the diagnosis of suspected IBD. 相似文献
The evolution of wavelike surface undulations in a thin polymer film under thermal stress in the presence of immobilized film spanning nanoparticles (NPs) is investigated. The elastic stresses in the plane of the polymer thin films is induced by fixed lateral constraints within the film (immobilized NPs) that resist in‐plane film thermal expansion as the temperature increases. Wavelike surface undulations arising from stress relaxation are observed as the thin‐film systems are heated above the glass‐transition temperature (Tg). The thermal stress affects both the characteristic wavelengths and the amplitudes of the wavelike surface undulations. Although the origin is different, the dynamic evolution of these wavelike undulations is strikingly similar in characteristics to spinodal decomposition. As compared with typical spinodal‐decomposition kinetics in liquid systems in which the early and intermediate stages are difficult to probe due to the narrow range of time scales, the overall evolutionary process of the wavelike surface undulations in NP‐filled polymer thin films is captured. The growth of the wavelike undulations shows characteristic time dependencies at the intermediate and late stages of instability.
