AIM: To evaluate the safety and feasibility of laparoscopic spleen-preserving distal pancreatectomy (LSPDP) with autologous islet transplantation (AIT) for benign tumors of the pancreatic body-neck.
Aim: To evaluate KAII/CD82 expression in Chinese patients with benign prostatic hyperplasia (BPH) and late-stage carcinoma of prostate (CaP). Methods: Thirty Chinese patients with benign prostatic hyperplasia and 34 w...Aim: To evaluate KAII/CD82 expression in Chinese patients with benign prostatic hyperplasia (BPH) and late-stage carcinoma of prostate (CaP). Methods: Thirty Chinese patients with benign prostatic hyperplasia and 34 withCaP (adenocarcinoma clinical stage C and D) were analyzed by means of immunohistochemical methods. Results:The KAII/CD82 expression in BPH tissue was all positive, which was uniformly located on the glandular cell mem-brane at the cell-to-cell borders, but KAII/CD82 expression in metastasis CaP tissues was either significantly lower thanthat of BPH or negative, and the immunostaining pattern was not continuous. In late-stage CAP KAII/CD82 expressionwas correlated inversely to the pathological grade ( P < 0.05), but not to clinical stage ( P > 0.05). Conclusion:The authors believe that decreased and negative KAII/CD82 expression in late-stage CaP may be related to tumor pro-gression and metastasis, and appears to be a prognostic marker.展开更多
目的:腮腺深叶良性肿瘤(benign deep lobe parotid tumors,BDLPTs)具有多种临床表现和影像学特征,与选择合适的手术入路密切相关,本研究旨在探讨不同类型BDLPTs手术方式的差异。方法:选取2014年8月—2020年8月因腮腺区肿物就诊于北京大...目的:腮腺深叶良性肿瘤(benign deep lobe parotid tumors,BDLPTs)具有多种临床表现和影像学特征,与选择合适的手术入路密切相关,本研究旨在探讨不同类型BDLPTs手术方式的差异。方法:选取2014年8月—2020年8月因腮腺区肿物就诊于北京大学口腔医院并行手术治疗且病理诊断为BDLPTs的75例患者,回顾性评估CT影像资料,根据肿瘤与各种结构的解剖关系将BDLPTs分为4类,探讨每种类型肿瘤的手术治疗方法。采用SPSS 24.0软件包对数据进行统计学分析。结果:Ⅰ型BDLPTs(14/75,18.7%)完全位于下颌支和茎突下颌间隙内侧,瘤体增大时突向咽旁间隙。Ⅱ型BDLPTs(19/75,25.3%)位于下颌后间隙,以下颌支、茎突下颌间隙、乳突和下颌后静脉为界。Ⅲ型BDLPTs(27/75,36.0%)呈膨胀型生长,横穿茎突下颌间隙,从下颌后静脉延伸至咽旁间隙。Ⅳ型BDLPTs(15/75,20%)位于耳垂下方、面神经和下颌后静脉深部。经下颌骨劈开入路主要用于Ⅰ型病例(10/14),Ⅲ型病例采用腮腺入路(14例)、下颌入路(11例)和腮腺-下颌联合入路(2例),Ⅱ型和IV型病例经腮腺入路同时行腮腺切除术。结论:BDLPTs分类可为术前制定治疗计划提供有价值的见解和实践指导。展开更多
目的 探讨非对称回波最小二乘估算法迭代水脂分离序列(iterative decomposition of water and fat with echo asymmetrical and least-squares estimation quantitation sequence, IDEAL-IQ)来源的R2^(*)值在乳腺良恶性肿瘤鉴别诊断中...目的 探讨非对称回波最小二乘估算法迭代水脂分离序列(iterative decomposition of water and fat with echo asymmetrical and least-squares estimation quantitation sequence, IDEAL-IQ)来源的R2^(*)值在乳腺良恶性肿瘤鉴别诊断中的价值,并与传统多回波T2^(*)梯度回波(gradient recalled echo, GRE)序列来源的R2^(*)值进行比较。材料与方法 回顾性分析2021年9月至2023年10月在中国医科大学附属第一医院连续收治的42名患者的50个良性肿瘤病灶,在本院影像归档和通信系统(picture archiving and communication systems, PACS)中使用倾向性评分匹配方法匹配肿瘤所在最大层面的最长径,按1∶3的比例纳入150名患者的150个恶性肿瘤病灶。将恶性肿瘤根据预后因子[雌激素受体(estrogen receptor, ER)、孕激素受体(progesterone receptor, PR)以及人表皮生长因子受体2(human epidermal growth factor receptor 2, HER-2)]的阳性/阴性表达情况进行分组。所有患者均接受包含IDEAL-IQ和多回波T2*GRE序列的多参数MRI,测量以下定量参数:IDEAL-IQ序列R2^(*)值(R2^(*)IDEAL)、多回波T2*GRE序列R2^(*)值(R2^(*)GRE)、表观扩散系数(apparent diffusion coefficient, ADC)及肿瘤长径。根据原始资料类型的不同,分别利用单因素分析(独立样本t检验、Mann-Whitney U检验等方法)对比分析各参数的差异。采用Spearman相关性分析R2^(*)IDEAL与R2^(*)GRE及二者与ADC的相关性。采用配对样本t检验比较R2^(*)IDEAL与R2^(*)GRE的差异。采用logistic回归分析建立联合诊断模型,并使用受试者工作特征(receiver operating characteristic, ROC)曲线及曲线下面积(area under the curve,AUC)分析单独及联合参数鉴别乳腺肿瘤良恶性的效能。结果 相关性分析显示乳腺肿瘤患者的R2^(*)IDEAL与R2^(*)GRE呈中度相关(r=0.763,P<0.001),二者与ADC值均呈负性弱相关[r=-0.300(R2^(*)IDEAL),-0.306(R2^(*)GRE),P<0.001]。良性组与恶性组中,R2^(*)IDEAL与R2^(*)GRE均呈中度相关(r=0.745、0.680,P<0.001),二者与ADC均无相关性。两种序列所得的R2^(*)值差异有统计学意义(P<0.001)。R2^(*)IDEAL在良恶性组间差异有统计学意义(P<0.001),管腔HER-2阴性型R2^(*)值最高。对于单一参数,ADC值鉴别良恶性的AUC最高(0.857);对于联合参数,R2^(*)IDEAL+ADC鉴别良性组与管腔阴性组的AUC最高(0.927);差异均有统计学意义(P<0.05)。结论 IDEAL-IQ序列生成的R2^(*)值可用于区分良恶性乳腺肿块,可能成为除ADC外辅助乳腺肿瘤良恶性鉴别的又一无需对比剂参数。展开更多
目的系统评价超声造影(contrast-enhanced ultrasound,CEUS)对局灶性睾丸病变的诊断价值。方法检索PubMed、Embase、Cochrane Library、Web of Science、中国生物医学文献数据库(CBM)、中国知网(CNKI)、万方、维普(VIP)数据库,收集从建...目的系统评价超声造影(contrast-enhanced ultrasound,CEUS)对局灶性睾丸病变的诊断价值。方法检索PubMed、Embase、Cochrane Library、Web of Science、中国生物医学文献数据库(CBM)、中国知网(CNKI)、万方、维普(VIP)数据库,收集从建库至2023年8月10日发表的关于CEUS诊断局灶性睾丸病变的相关文献,根据纳入和排除标准筛选文献、提取数据,并行文献质量评价,采用RevMan5.4、Meta disc1.4及Stata15.0软件分析CEUS在睾丸肿瘤与肿瘤样病变、肿瘤良恶性两个方面的诊断效能。结果最终纳入13篇文献共712个病灶。Meta分析结果显示,CEUS诊断睾丸肿瘤与肿瘤样病变的合并敏感度、特异度、阳性似然比、阴性似然比分别为0.95(95%CI:0.87~0.98)、0.84(95%CI:0.73~0.91)、5.8(95%CI:3.3~10.2)、0.06(95%CI:0.02~0.17),合并受试者工作特征曲线下面积为0.94(95%CI:0.92~0.96);CEUS诊断睾丸良恶性病变的合并敏感度、特异度、阳性似然比、阴性似然比分别为0.95(95%CI:0.85~0.99)、0.81(95%CI:0.65~0.90)、4.9(95%CI:2.5~9.6)、0.06(95%CI:0.02~0.20),合并受试者工作特征曲线下面积为0.96(95%CI:0.94~0.97)。结论CEUS对局灶性睾丸病变具有较高的诊断价值,能为临床诊疗提供参考。展开更多
Diffusion weighted magnetic resonance imaging (DWI) is an imaging technique which provides tissue contrast by the measurement of diffusion properties of water molecules within tissues. Diffusion is expressed in an app...Diffusion weighted magnetic resonance imaging (DWI) is an imaging technique which provides tissue contrast by the measurement of diffusion properties of water molecules within tissues. Diffusion is expressed in an apparent diffusion coefficient (ADC), which reflects the diffusion properties unique to each type of tissue. DWI has been originally used in neuroradiology. More recently, DWI has increasingly been used in addition to conventional unenhanced and enhanced magnetic resonance imaging (MRI) in other parts of the body. The reason for this delay was a number of technical problems inherent to the technique, making DWI very sensitive to artifacts, which had to be overcome. With assessment of ADC values, DWI proved to be helpful in characterization of focal liver lesions. However, DWI should always be used in conjunction to conventional MRI since there is considerable overlap between ADC values of benign and malignant lesions. DWI is useful in the detection of hepatocellular carcinoma in the cirrhotic liver and detection of liver metastases in oncological patients. In addition, DWI is a promising tool in the prediction of tumor responsiveness to chemotherapy and the follow-up of oncological patients after treatment, as DWI may be capable of detecting recurrent disease earlier than conventional imaging.This review focuses on the most common applications of DWI in the liver.展开更多
目的探讨3.0 T磁共振动态增强扫描(dynamic contrast-enhanced MRI,DCE-MRI)定量分析对前列腺癌和前列腺增生鉴别诊断的应用价值,并评价定量指标Ktrans、Kep、Ve与Gleason评分的相关性。材料与方法回顾性分析43例经病理证实的前列腺疾...目的探讨3.0 T磁共振动态增强扫描(dynamic contrast-enhanced MRI,DCE-MRI)定量分析对前列腺癌和前列腺增生鉴别诊断的应用价值,并评价定量指标Ktrans、Kep、Ve与Gleason评分的相关性。材料与方法回顾性分析43例经病理证实的前列腺疾病患者的影像资料,其中前列腺癌(prostate cancer,PC)27例,前列腺增生(benign prostatic hyperplasia,BPH)16例,均行常规MRI和DCE-MRI检查,在定量分析软件上测量病灶的容积转运常数(Ktrans)、速率常数(Kep)、血管外细胞外容积分数(Ve)值,比较三者在前列腺癌组和增生组中的差异,并评价前列腺癌组Ktrans、Kep、Ve值与Gleason评分的相关性。结果前列腺癌组织的Kt r a n s、Ke p、Ve分别为(0.312±0.085)min-1、(0.818±0.098)min-1和(0.379±0.031),前列腺增生组织的Ktrans、Kep、Ve分别为(0.213±0.046)min-1、(0.537±0.076)min-1和(0.324±0.034),前列腺癌组织的Kt r a n s、Ke p、Ve明显高于增生组织,差异有统计学差异(P<0.001);前列腺癌区的Ktrans、Kep、Ve值与Gleason评分无明显相关性。结论 DCEM R I定量分析在前列腺癌的诊断中具有较高价值,有利于前列腺良恶性病变的鉴别诊断。前列腺癌区的Kt r a n s、Ke p、Ve值与Gleason评分无明显相关性。展开更多
文摘AIM: To evaluate the safety and feasibility of laparoscopic spleen-preserving distal pancreatectomy (LSPDP) with autologous islet transplantation (AIT) for benign tumors of the pancreatic body-neck.
基金The work was supported by a grant from the Guangdong Scientfic and Technologic Committee(No 970750)
文摘Aim: To evaluate KAII/CD82 expression in Chinese patients with benign prostatic hyperplasia (BPH) and late-stage carcinoma of prostate (CaP). Methods: Thirty Chinese patients with benign prostatic hyperplasia and 34 withCaP (adenocarcinoma clinical stage C and D) were analyzed by means of immunohistochemical methods. Results:The KAII/CD82 expression in BPH tissue was all positive, which was uniformly located on the glandular cell mem-brane at the cell-to-cell borders, but KAII/CD82 expression in metastasis CaP tissues was either significantly lower thanthat of BPH or negative, and the immunostaining pattern was not continuous. In late-stage CAP KAII/CD82 expressionwas correlated inversely to the pathological grade ( P < 0.05), but not to clinical stage ( P > 0.05). Conclusion:The authors believe that decreased and negative KAII/CD82 expression in late-stage CaP may be related to tumor pro-gression and metastasis, and appears to be a prognostic marker.
文摘Diffusion weighted magnetic resonance imaging (DWI) is an imaging technique which provides tissue contrast by the measurement of diffusion properties of water molecules within tissues. Diffusion is expressed in an apparent diffusion coefficient (ADC), which reflects the diffusion properties unique to each type of tissue. DWI has been originally used in neuroradiology. More recently, DWI has increasingly been used in addition to conventional unenhanced and enhanced magnetic resonance imaging (MRI) in other parts of the body. The reason for this delay was a number of technical problems inherent to the technique, making DWI very sensitive to artifacts, which had to be overcome. With assessment of ADC values, DWI proved to be helpful in characterization of focal liver lesions. However, DWI should always be used in conjunction to conventional MRI since there is considerable overlap between ADC values of benign and malignant lesions. DWI is useful in the detection of hepatocellular carcinoma in the cirrhotic liver and detection of liver metastases in oncological patients. In addition, DWI is a promising tool in the prediction of tumor responsiveness to chemotherapy and the follow-up of oncological patients after treatment, as DWI may be capable of detecting recurrent disease earlier than conventional imaging.This review focuses on the most common applications of DWI in the liver.
文摘目的探讨3.0 T磁共振动态增强扫描(dynamic contrast-enhanced MRI,DCE-MRI)定量分析对前列腺癌和前列腺增生鉴别诊断的应用价值,并评价定量指标Ktrans、Kep、Ve与Gleason评分的相关性。材料与方法回顾性分析43例经病理证实的前列腺疾病患者的影像资料,其中前列腺癌(prostate cancer,PC)27例,前列腺增生(benign prostatic hyperplasia,BPH)16例,均行常规MRI和DCE-MRI检查,在定量分析软件上测量病灶的容积转运常数(Ktrans)、速率常数(Kep)、血管外细胞外容积分数(Ve)值,比较三者在前列腺癌组和增生组中的差异,并评价前列腺癌组Ktrans、Kep、Ve值与Gleason评分的相关性。结果前列腺癌组织的Kt r a n s、Ke p、Ve分别为(0.312±0.085)min-1、(0.818±0.098)min-1和(0.379±0.031),前列腺增生组织的Ktrans、Kep、Ve分别为(0.213±0.046)min-1、(0.537±0.076)min-1和(0.324±0.034),前列腺癌组织的Kt r a n s、Ke p、Ve明显高于增生组织,差异有统计学差异(P<0.001);前列腺癌区的Ktrans、Kep、Ve值与Gleason评分无明显相关性。结论 DCEM R I定量分析在前列腺癌的诊断中具有较高价值,有利于前列腺良恶性病变的鉴别诊断。前列腺癌区的Kt r a n s、Ke p、Ve值与Gleason评分无明显相关性。
