Objective To review study of various imaging examination methods for evaluating of gastric cancer. Method The recent and relevant literatures about the imaging examination methods for evaluating of gastric cancer were scrutinized and analyzed retrospectively. Results The imaging examination methods such as the barium meal, endoscopic ultrasonography, computed tomography (CT), magnetic resonance imaging, positron emission tomography-CT, were used to evaluate the gastric cancer, but with certain limitations. The new methods such as the dual-energy CT, radiomics, and so on, had become the focus of the clinical research. The imaging methods are of great significances in the evaluation of the gastric cancer before the surgery, peritoneal metastasis, chemoradiotherapy and neoadjuvant chemotherapy later. Conclusions Various imaging examination methods, used in evaluating of gastric cancer, play some important roles in clinical application. New methods such as dual-energy CT, radiomics, and so on, are with bright potentiality for clinical application.
ObjectiveTo summarize the research progress of ultrasmall superparamagnetic iron oxide (USPIO) enhanced magnetic resonance imaging (MRI) in normal-sized lymph node metastasis of colorectal cancer.MethodThe relevant literatures published recently at domestic and abroad about USPIO enhanced MRI in normal-sized lymph node metastasis of colorectal cancer were collected and reviewed.ResultsUSPIO, a kind of lymph node targeted magnetic resonance contrast agent, could be used to evaluate lymph node metastasis of malignant tumors. USPIO enhanced MRI could detect normal-sized lymph node metastasis in colorectal cancer effectively compared with normal MRI. It provided a higher diagnostic performance than normal enhanced MRI. In addition, USPIO enhanced MRI could also distinguish inflammatory and metastatic lymph nodes better that were difficult to be distinguished by normal enhanced MRI.ConclusionUSPIO enhanced MRI shows a certain potential for clinical application in detecting normal-sized lymph node metastasis of colorectal cancer, but it has not been widely used in China.
Objective We sought a good understanding of the current role of computed tomography (CT) in the diagnosis of small bowel obstruction (SBO).Methods We looked for the best evidence on computed tomography for diagnosing small bowel obstruction by searching MEDLINE/PubMed (1978-April, 2006), SUMsearch (1978-April, 2006), CNKI (1978-April, 2006) and critically appraised the evidence. Results There was powerful evidence supporting the efficacy of computed tomography in the diagnosis of small bowel obstruction. Given the current evidence together with our clinical experience and considering the patient and his family members, values and preferences, computed tomography was done. We confirmed the diagnosis of strangulating small bowel obstruction, which needed immediate operation. Conclusions Computed tomography is a very useful tool for the diagnosis of small bowel obstruction with high sensibility and specificity.
【摘要】 目的 采用循证医学的方法评价硫唑嘌呤（aiathioprine，AZA）治疗溃疡性结肠炎（ulcerative colitis，UC）的有效性和安全性。 方法 计算机检索PubMed、Cochrane library、Embase、CNKI、维普和CBM数据库收集国内外关于AZA诊疗UC的随机对照试验（ramdomized controllel trial，RCT）。按Cochrane系统评价的方法评价纳入研究质量，并进行Meta分析。 结果 共纳入5个RCT，共262例UC患者。Meta分析结果显示，AZA治疗UC在缓解率方面与安慰剂比较，差异无统计学意义[P=1.19，95%CI（0.94，1.49），P=0.14]；在复发率方面，两者比较差异有统计学意义[P=0.72，95%CI（0.54，0.95），P=0.02]；全部不良反应方面和严重不良反应方面，两者比较差异无统计学意义，Meta分析结果分别为[P=2.52，95%CI（0.82，7.74），P=0.11]和[P=4.03，95%CI（0.88，18.53），P=0.07]。 结论 系统评价结果为AZA在疗效方面优于安慰剂，在不良反应发生率方面差异无统计学意义。但由于纳入的5个研究中没有高质量的RCT，且有1个可能产生高度偏倚，使得这一结论受到影响，有必要开展更多设计严谨，大样本、多中心的RCT。【Abstract】 Objective To assess the efficacy and safety of azathio-prine in the treatment of ulcerative colitis through an evidence-based method. Methods We searched the literature from databases like PubMed, Cochrane library, CNKI, VIP, and CBM, and evaluated the quality of studies according to Cochrane systematic review. Finally, Meta-analysis was performed. Results Five randomized controlled trials (RCT) were included in this study with a total of 262 patients. Meta-analysis showed that there was no significant difference in the rate of remission between azathio-prine and placebo in treating ulcerative colitis [P=1.19, 95%CI (0.94, 1.49),P=0.14]. There was significant difference in the relapse rate between the two treating methods [P=0.72, 95%CI (0.54, 0.95),P=0.02]. In addition, there was no statistical difference in all adverse effects [P=2.52, 95%CI (0.82, 7.74),P=0.11] and serious adverse effects [P=4.03, 95%CI (0.88, 18.53),P=0.07] between the two treating methods. Conclusion In the treatment of ulcerative colitis, azathio-prine has a significant advantage in efficacy than placebo, but there is no significant difference in the rate of adverse events between the two groups. However, none of the 5 RCT included in this review has a high quality and one of them even probably has a high bias, which has a big influence on our conclusion. Consequently, multi-center large-scale randomized controlled trials of higher quality are needed to make confirmation.
Objective To evaluate the imaging features of hepatic epithelioid hemangioendothelioma (HEHE). Methods The imaging data of 15 patients with HEHE proved by surgery and pathology who reeived treatment in West China Hospital from Jul. 2012 to Aug. 2018, were retrospectively analyzed. The location, boundary, density/signal, and enhanced features of tumor were observed. Results Among 15 cases, there were 3 cases of single, 5 cases of multiple, and 6 cases of fusion. Thirteen cases were distributed under the capsular of liver, accompanied by the capsule retraction sign, 14 cases had lollipop sign, 7 cases had core pattern sign. On plain CT images, the lesions manifested as low density. On plain MR images, the lesions had hypointense on T1-weighted images and hyperintense on T2-weighted images. The enhanced scanning could be characterized by mild enhancement, rim-like enhancement at early phase, and progressive centripetal fill-in enhancement during dynamic phase imaging. Conclusions CT and MRI imagings of HEHE are different, and there are certain characteristics of capsule retraction sign, lollipop sign, and core pattern sign.
Objective To determine feasibility of texture analysis of CT images for the discrimination of hepatic epithelioid hemangioendothelioma (HEHE) and liver metastases of colon cancer. Methods CT images of 9 patients with 19 pathologically proved HEHEs and 18 patients with 38 liver metastases of colon cancer who received treatment in West China Hospital of Sichuan University from July 2012 to August 2016 were retrospectively analyzed. Results Thirty best texture parameters were automatically selected by the combination of Fisher coefficient (Fisher)+classification error probability combined with average correlation coefficients (PA)+mutual information (MI). The 30 texture parameters of arterial phase (AP) CT images were distributed in co-occurrence matrix (22 parameters), run-length matrix (1 parameter), histogram (4 parameters), gradient (1 parameter), and autoregressive model (2 parameters). The distribution of parameters in portal venous phase (PVP) were co-occurrence matrix (18 parameters), run-length matrix (2 parameters), histogram (7 parameters), gradient (2 parameters), and autoregressive model (1 parameter). In AP, the misclassification rates of raw data analysis (RDA)/K nearest neighbor classification (KNN), principal component analysis (PCA)/KNN, linear discriminant analysis (LDA)/KNN, and nonlinear discriminant analysis, and nonlinear discriminant analysis (NDA)/artificial neural network (ANN) was 38.60% (22/57), 42.11% (24/57), 8.77% (5/57), and 7.02% (4/57), respectively. In PVP, the misclassification rates of RDA/KNN, PCA/KNN, LDA/KNN, and NDA/ANN was 26.32% (15/57), 28.07% (16/57), 15.79% (9/57), and 10.53% (6/57), respectively. The misclassification rates of AP and PVP images had no statistical significance on the misclassification rates of RDA/KNN, PCA/KNN, LDA/KNN, and NDA/ANN between AP and PVP (P>0.05). Conclusion The texture analysis of CT images is feasible to identify HEHE and liver metastases of colon cancer.
This study aims to investigate the value of pre-treatment computed tomography (CT) texture analysis in predicting therapeutic response of liver metastasis from colorectal cancer after combined targeting chemotherapy. A total of 82 patients with colorectal cancer liver metastases who underwent chemotherapy combined with targeted therapy (cetuximab) between March 2011 and October 2017 comprised this retrospective study population. According to the RECIST1.1, the best curative effect evaluation of patients was recorded. Complete response (CR) and partial response (PR) were assigned to the response group, and the stable disease (SD) and progressive disease (PD) were assigned to the non-response group. The CT texture analysis was based on the Omini-Kinetics software, and the three-dimensional (3D) texture analysis was performed on the marked lesion on portal phase. The differences of texture parameters between the response group and the non-response group were compared. The receiver operating characteristic (ROC) curves were depicted on the parameters which with statistically difference, to characterize value in predicting the response to target-combined chemotherapy. The differences of Entropy, Energy, Variance, std. Deviation, Quantile95 and sumEntropy between the two groups in pre-treatment lesions were significant (P < 0.05). And lesions with higher Entropy, lower Energy, higher Variance, higher std Deviation and higher sumEntropy seemed to indicate a better therapeutic response. When sumEntropy > 0.867, good diagnostic efficiency could be obtained, with sensitivity of 60.5% and specificity of 79.5%, respectively. In conclusion, texture parameters derived from baseline CT images of colorectal cancer liver metastasis have the potential value acting as imaging biomarkers in predicting tumor response to combined target chemotherapy.
This study reported a case of intrahepatic splenosis with CT and MR findings mimicking hepatocellular carcinoma. The patient had two risk factors for hepatocellular carcinoma, including elevated alpha-fetoprotein and a history of hepatitis B virus infection, and had previously splenectomy due to spleen trauma. This paper briefly described the etiology and pathogenesis of intrahepatic splenosis and reviewed the radiological findings of this disease reported in previous literature, in order to strengthen readers’ understanding of intrahepatic splenosis and reduce the misdiagnosis rate.
Gastric cancer remains one of the most prevalent and fatal malignancies in China. Peritoneal metastasis represents a frequent mode of dissemination or recurrence in patients with advanced disease and confers an extremely poor prognosis. In recent years, considerable progress has been made in imaging techniques, with modalities including CT, ultrasound, MRI and PET-CT being implemented to evaluate peritoneal metastasis. However, adequate detection remains challenging, particularly for occult peritoneal metastasis. With the advent of precision medicine, radiomics and artificial intelligence have undergone rapid development and show considerable promise for the early prediction of peritoneal metastasis in gastric cancer, providing a new means of diagnosis and treatment for patients with peritoneal metastasis.
【Abstract】ObjectiveTo evaluate the main CT features, the morbidity of CT signs and the anatomic-pathologic bases of secondary pyogenic peritonitis (SPP). MethodsTwentyfour patients of the SPP were retrospectively studied. Emphasis was placed on the spiral CT manifestations of the SPP correlating with their anatomic-pathologic bases and the occurrence as well as the signs of primary lesions which resulted in the SPP. ResultsThe main CT manifestations of SPP revealed as follows: the thickened peritoneum, 16 in 24 cases (66.7%), of which 14 cases were smooth and 2 cases were irregular; the ascites, 15 in 24 cases (62.5%); the free air within peritoneal cavity, 9 in 24 cases (37.5%); the edema and thickening involved in the greater omentum, 8 in 24 cases (33.3%); the small bowel mesentery, 5 in 24 cases (20.8%); and the bowels’ wall, 5 in 24 cases (20.8%); the adhesions of bowels, 6 in 24 cases (25.0%). The CT manifestation of the promary lesions, which caused SPP, and the complications were shown as follows: the signs of primary lesion, 13 cases (54.2%); the inflammatory changes in retroperitoneal cavity 13 cases (54.2%); the involvements of chest 13 cases (54.2%); and the abscess in peritoneal and pelvic cavity 6 cases (25.0%). ConclusionThe main significant CT signs of SPP could be concluded as follows: thickened peritoneum, ascites, free air within peritoneal cavity, edematous and thickened greater omentum, the small bowel mesentery, and the bowels’ wall, as well as the adhesions of bowels. So, the CT scan can present plenty of CT signs, which are significant and very helpful for making an appropriate diagnosis of SPP.