Comparative Study of Modified Posterior Operation to Treat Kümmell's Disease

The present study aimed at examining the curative effect of modified posterior operation on treatment of Kümmell''s disease.About 30 patients of Kümmell''s disease with complete image and clinical data treated during June 2004 to July 2013 were conducted with anterior and posterior approaches, respectively. Kyphotic Cobb angle, fractured vertebra wedge angle, and the anterior and posterior heights of fractured vertebra were all measured through x-ray before and after operation, and the pain visual analog scale (VAS) was determined for evaluating the effect of operations. The injury and restoration of neurological function were assessed using Frankel classification.Patients in group A were treated with anterior operation, whereas group B was posterior operation. Postoperatively, VAS score, kyphotic Cobb angle, anterior vertebra height, and pathologic vertebra wedge angle were all significantly improved in patients with Kümmell''s disease receiving modified posterior operation (group B). Similar results were also observed in patients with anterior operation. The improvement of VAS and correction rate of kyphotic Cobb angle indicated equivalent effects of posterior and anterior operations. Meanwhile, alleviated neurological function damage was observed in 2 groups. Relevant factor analysis illustrated that there was no significant correlation of the severity and improvement rate of pain symptoms with age, medical history, anterior and posterior vertebra heights, kyphotic Cobb angle, and pathological vertebra wedge angle.Compared with traditional anterior approach, modified posterior operation, adopting transpedicular vertebral body grafting combined with vertebral pedicle screw fixation, could produce equivalent effects on kyphosis correction, pain relief, and improvement of neurological function in patients with Kümmell''s disease.     

Radiomics model based on preoperative gadoxetic acid-enhanced MRI for predicting liver failure

BACKGROUND Postoperative liver failure is the most severe complication in cirrhotic patients with hepatocellular carcinoma(HCC) after major hepatectomy. Current available clinical indexes predicting postoperative residual liver function are not sufficiently accurate.AIM To determine a radiomics model based on preoperative gadoxetic acid-enhanced magnetic resonance imaging for predicting liver failure in cirrhotic patients with HCC after major hepatectomy.METHODS For this retrospective study, a radiomics-based model was developed based on preoperative hepatobiliary phase gadoxetic acid-enhanced magnetic resonance images in 101 patients with HCC between June 2012 and June 2018. Sixty-one radiomic features were extracted from hepatobiliary phase images and selected by the least absolute shrinkage and selection operator method to construct a radiomics signature. A clinical prediction model, and radiomics-based model incorporating significant clinical indexes and radiomics signature were built using multivariable logistic regression analysis. The integrated radiomics-based model was presented as a radiomics nomogram. The performances of clinical prediction model, radiomics signature, and radiomics-based model for predicting post-operative liver failure were determined using receiver operating characteristics curve, calibration curve, and decision curve analyses.RESULTS Five radiomics features from hepatobiliary phase images were selected to construct the radiomics signature. The clinical prediction model, radiomics signature, and radiomics-based model incorporating indocyanine green clearance rate at 15 min and radiomics signature showed favorable performance for predicting postoperative liver failure(area under the curve: 0.809-0.894). The radiomics-based model achieved the highest performance for predicting liver failure(area under the curve: 0.894; 95%CI: 0.823-0.964). The integrated discrimination improvement analysis showed a significant improvement in the accuracy of liver failure prediction when radiomics signature was added to the clinical prediction model(integrated discrimination improvement = 0.117, P =0.002). The calibration curve and an insignificant Hosmer-Lemeshow test statistic(P = 0.841) demonstrated good calibration of the radiomics-based model. The decision curve analysis showed that patients would benefit more from a radiomics-based prediction model than from a clinical prediction model and radiomics signature alone.CONCLUSION A radiomics-based model of preoperative gadoxetic acid–enhanced MRI can be used to predict liver failure in cirrhotic patients with HCC after major hepatectomy.     

甲状腺疾病患者血清 Tg-CIC 中 Tg-Ab 水平检测及相关临床研究

目的　对血清甲状腺球蛋白免疫复合物 (thyroglobulin circulating immune complex, Tg-CIC) 中抗甲状腺球蛋白抗体 (anti-thyroglobulin antibody, Tg-Ab) 含量检测，探讨 Tg-CIC 在甲状腺疾病中的临床以及流行病学意义。方法　收集甲状腺疾病患者血清标本 187 例，每例血清标本分为两组 ( 实验组和空白对照组 )，采用免疫复合物解离专利技术对甲状腺疾病患者血清标本 Tg-CIC 进行分离、解离，通过检测 Tg-CIC 解离后的 Tg-Ab 含量来间接反映甲状腺疾病患者血清中Tg-CIC 水平，按照不同的甲状腺疾病进行分组并对实验结果分析讨论。结果　不同甲状腺患者血清中 Tg-CIC 总阳性率达 92.51%，不同甲状腺疾病血清中 Tg-CIC 的阳性率差异无统计学意义 (χ?=2.917, P>0.05)。不同甲状腺疾病患者间血清游离 Tg-Ab 含量差异无统计学意义 (H=3.882, P>0.05)，不同甲状腺疾病患者间血清 CIC 中 Tg-Ab 含量差异无统计学意义(H=5.5842, P>0.05)。不同甲状腺疾病患者中，甲状腺功能亢进、甲状腺炎以及甲状腺结节患者血清游离 Tg-Ab 的含量与血清 CIC 中的 Tg-Ab 含量呈正相关 (P<0.05)，甲状腺功能减退、甲状腺肿瘤患者血清游离 Tg-Ab 的含量与血清 CIC 中的Tg-Ab 含量不相关 (P>0.05)。结论　在甲状腺疾病患者血清中，大部分可检出 Tg-CIC，与疾病类型无关。而甲状腺疾病患者中，甲状腺功能亢进、甲状腺炎以及甲状腺结节患者血清游离 Tg-Ab 含量与血清 CIC 中 Tg-Ab 含量存在相关性，为我们进一步了解 Tg-CIC 与甲状腺疾病的发生、发展的相关性研究奠定了基础，提供了新的研究视角。     

同轴微切口与传统小切口超声乳化术的临床疗效及术后并发症对比分析

目的　比较1.8 mm同轴微切口超声乳化术与传统同轴3.0 mm小切口超声乳化术的临床疗效及术后并发症。方法　收集2015年5月至10月北京同仁医院北京同仁眼科中心收治的老年性白内障患者48例（48眼），将患者分为微切口组和小切口组。微切口组主切口长1.8 mm，前房内注入透明质酸钠，行直径约为5.0 mm的中央连续环形撕囊，水分离后用劈核钩劈核，扭动模式超声乳化吸出术，自动灌注系统吸出残留皮质。小切口组角膜主切口大小为3.0 mm，术中植入常规折叠式人工晶状体。术后行裂隙灯、眼底镜以及角膜地形图检查，电脑验光检查患者最佳矫正视力。结果　术后1周、1个月、3个月两组患者最佳矫正视力比较，差异均无统计学意义（均为P>0.05）。术后1个月和3个月两组间手术源性散光比较，微切口组均明显低于小切口组，差异均有统计学意义（均为P<0.01）。在微切口组组内术后1个月和3个月手术源性散光无明显差异（P>0.05），微切口组手术源性散光在术后1个月保持稳定。在小切口组组内术后3个月手术源性散光明显低于术后1个月 （P<0.01）。微切口组术前角膜厚度为（567±27）μm，小切口组为（564±25）μm，两组差异无统计学意义（P>0.05）；术后1个月与3个月两组间角膜厚度变化差异亦均无统计学意义（均为P>0.05）。在随访期间两组患者均未发生后发性白内障。结论　1.8 mm同轴微切口白内障超声乳化吸出术安全可靠，术后散光恢复快，可有效减少术后角膜手术源性散光。     

弥散张量成像在癫痫中的研究进展

癫痫作为多种病因引起的神经系统慢性、发作性疾病,严重影响着患者的生活质量,因此对其及时诊断和早期治疗极为重要。目前已有多种神经影像技术用于癫痫的定位、定侧和病理生理研究。弥散张量成像是利用水分子在组织中弥散的各向异性成像的磁共振技术,是目前唯一能在活体中无创性地显示脑白质纤维束的方法,它能敏感地显示脑部细微结构,并能揭示各个结构间的功能联系,有助于癫痫的研究。本文主要从癫痫的病因诊断、癫痫手术的辅助指导、癫痫的结构网络及其与癫病功能障碍的相关性研究等方面对DTI应用于癫痫的最新研究进展进行综述。     

Patient preferences and predicted relative uptake for targeted therapies in metastatic colorectal cancer: a discrete choice experiment

Abstract

Objective

Ras wild-type metastatic colorectal cancers (mCRC) may be treated with anti-vascular endothelial growth factor (VEGF) or anti-epidermal growth factor receptor (EGFR) agents. We aim to estimate patients’ preferences for mCRC treatment and relative importance of cost, efficacy improvement, avoidance of side effects and therapy convenience, and relative uptake between profiles that resemble Bevacizumab (anti-VEGF) and Cetuximab (anti-EGFR), two commonly prescribed mCRC targeted therapies.