Value of CT scan in the diagnosis of primary large bowel lymphoma

Objective: To study the CT imaging of primary large bowel lymphoma and evaluate the value of CT scan.Methods:CT reports of 8 patients with proven primary large bowel lymphoma were retrospectively reviewed. Plain CT scans were done on all patients, enhanced CT scans simultaneously with 5-10mm section thickness, and 5-10mm table increments in 6 cases. Results:Primary involved sites were on the cecum (n=3),the ascending colon (n=2),and the rectum (n=1). The tumor was found in multiple areas of the large bowel in 2 cases. CT appearance fell into 3 typical patterns in our study. The first was focal mass type in 2 cases, with one combined with intussusception and retroperitoneal adenopathy;the second was segmental annular involvement type in 3 cases, with one of them combined with mesenteric adenopathy; the last was diffuse involvement type in 2 cases. Multiple nodules were seen in the rectum in 1 case. Conclusion:CT was found to be accurate in detecting the primary sites and complications of lymphoma, and evaluating invasion of adjacent structures; Focal mass type, segmental annular involvement type and diffuse involvement type are the main patterns of CT features in the primary large bowel lymphoma; The features revealed by CT scan are suggestive of primary large bowel lymphoma in some cases.     

术中磁共振影像神经导航治疗脑胶质瘤的临床初步应用(附61例分析)

目的总结术中磁共振影像(iMRI)神经导航手术治疗脑胶质瘤的初步经验。方法2006年3月～2006年12月,61例脑胶质瘤病人接受iMRI神经导航手术。结果手术总耗时2.5～8.5 h,平均(5.2±1.5)h。图像质量良好49例(80.3%),一般7例(11.5%),差5例(8.2%)。56例图像质量优良的病人中,iMRI扫描次数2～5次,平均(2.6±0.8)次;其中2次32例,3次16例,4次5例,5次3例;24例(42.9%)经iMRI发现肿瘤切除范围未达术前计划,仍需进一步切除。无iMRI相关不良事件发生。结论iMRI神经导航手术治疗脑胶质瘤安全、有效,可实时纠正术中脑移位误差,精确定位脑胶质瘤的影像学边界,定量评估手术切除范围,有效提高肿瘤切除率。     

SD大鼠骨组织冷冻预处理温度的选择

目的 探讨冷冻预处理温度对骨组织超微结构的影响，为吻合血管同种异体骨保存移植提供依据。方法 以15％二甲基亚砜(DMSO)为低温保护剂，采用两步冷冻步骤，对SD大鼠骨组织进行-45，-50，-55，-60，-65和-70℃冷冻预处理，-196℃液氮保存1周，复温后光镜和透射电镜观察。结果 温度-55℃冷冻预处理和液氮保存的大鼠骨组织超微结构保持良好，其余温度组的骨细胞轻度水肿，线粒体肿胀，嵴破坏，细胞核有固缩现象，部分骨细胞变性明显，甚者细胞膜不连续。结论 骨组织冷冻预处理温度在-50～-60℃之间，-55℃是最佳温度值，可获得最大部分生物活性的骨组织。     

坚持化学烧伤研究特色立足临床技术创新

北京军区解放军第二五一医院是一家开展床位1300张的三级甲等医院,拥有1个国家医院运行机制研究基地、3个全军专科中心,其中全军烧伤中心为医院首家成立者.     

颈内动脉狭窄或闭塞侧支循环途径的DSA和MR血管成像研究

目的　研究DSA、MR血管成像 (MRA)对颈内动脉狭窄或闭塞后侧支循环途径评价的意义。方法　颈内动脉狭窄或闭塞者 74例 ,DSA和MRA上脑血管正常表现者各 6 0例为对照组 ,分析其DSA和MRA表现。结果　 74例患者均有颈内动脉分叉以上狭窄或闭塞。病变同侧后交通动脉在DSA上的出现率 ,疾病组低于对照组 (P =0 0 2 5 ) ;在时间飞跃 (TOF)法MRA上的出现率 ,疾病组明显高于对照组 (P =0 0 0 0 )。后交通动脉DSA、MRA测量值均较对照组增大 (P =0 0 0 0 )。眼动脉直径DSA测量值较对照组增大 (P =0 0 0 3)。疾病组后交通动脉出现率在DSA上高于MRA (P <0 0 5 )。结论　DSA对本病侧支途径评价有重要意义 ,为术前必要检查。MRA安全 ,可从形态和功能上评价侧支循环 ,可做为首选方法     

Inhibiting effect of antisense hTRT on telomerase activity of human liver cancer cell line SMMC-7721

Objective: To induce changes in biological character of human liver cancer cell line SMMC-7721 by blocking the expression of telomerase genes hTRT and to explore its value in cancer gene therapy. Methods: The vehicle for eukaryotic expression of antisense hTRT was constructed and then transfected into SMMC-7721 cells. The effects of antisense hTRT gene on telomerase activity, cancer cell growth and malignant phenotypes were analyzed. Results: The obtained transfectants that could express antisense hTRT gene stably showed marked decrease in telomerase activity;the shortening of telomere was obvious; cells presented contact growth inhibition; in nude mice transplantation, the rate of tumor induction dramatically decreased. Conclusion : Antisense hTRT gene expression can significantly inhibit telomerase activity of cancer cells and decrease malignant phenotypes in vitro and in vivo. Therefore, as a telomerase inhibitor, antisense hTRT gene may be a new pathway for cancer therapy.     

健康教育项目设计PRECEDE诊断评价模式

美国著名健康教育专家Lawrence W.Green 提出的健康教育项目设计PRECEDE 诊断评价模式,站在社会健康的宏观高度,全面规划健康教育内容、方式与作用环节,并从项目设计开始就将监测评价纳入项目内容。由于设计思维的缜密与方法的科学性,保证了健康教育项目能够紧紧抓住重点健康问题,做到有的放矢。因此,在模式的引进和使用过程中,应结合我国妇幼卫生的现状和当地的实际情况,设计出适合我国国情的妇幼卫生健康教育项目规划,为发展我国妇幼卫生事业服务。     

人工晶体植入术中晶体后囊破裂的原因分析及处理

分析白内障摘除并后房型人工晶体植入术中发生晶体后囊破裂的原因和讨论处理方法。分析５５例（５５眼）白内障摘除并后房型人工晶体植入术中发生晶体后囊破裂的原因，裂口形态，大小及部位。根据具体情况采用不同处理方法。该术中合并症好发于抽吸晶体皮质及植入人工晶体时，各２１例（３８．２％），后囊破裂大小约３ｍｍ的３９例（７０．９％），５ｍｍ的１３例（２３．６％）。大于６ｍｍ的３例（５．５％）。后囊破裂的部位及形     

成年人马蹄内翻足的分型与外科治疗

1984～1995年共收治各种马蹄内翻足1074例,18岁以上的成年人491例,术后获得1年以上随访者296例,男173例,女123例。年龄最小18岁,最大61岁,平均27.8岁。其中>45岁者9例。左下肢139例,右下肢120例,双下肢37例,共333个足。导致马蹄内翻足的病因14种,其中小儿麻痹后遗症175例,占59.1％。333个足共施行369人次手术,30例畸形严重者分两期手术矫正。6例因术后畸形矫正不足,关节融合不好又施行了二次手术。术后随访1年～8年9个月,平均3.5年,优321个足,占96.4％。差12个足。