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Objective: To evaluate the results of low anterior resection treatment for middle and lower rectal cancer.Methods: Clinical and follow-up data of 196 patients with middle and lower rectal cancer who received low anterior resection treatment from June 1991 to June 2001 were retrospectively analyzed. Results: anterior resection technique including double stapling technique, pull-through and Park‘s operations could get a standard radical resection and had no significant differences in 1, 3, 5 and 10 years survival rates comparing with the abdominoperineal resection (Miles‘). Conclusion: The experience suggests that the low anterior resection technique was sale and simple,had less bleeding and fewer complications and could increase the life-quality of the patients with rectal cancer. 相似文献
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目的 初步探讨磁化传递对比(MTC)磁共振成像(MRI)技术在诱发性大鼠肝硬化肝癌中的作用。方法二乙基亚硝胺溶液诱发的大鼠肝硬化肝癌模型16只,结合病理检查发现〉5.0cm的癌结节66个,对照组为10只正常Wister大鼠。所有大鼠均行附加MT脉冲前后MRI扫描,序列包括SE序列T1WI、FSE序列T2WI。测量MR图像上正常肝组织、硬化肝脏及肝癌组织附加MT脉冲前后的的信号强度,计算信噪比(SNR)、对比噪声比(CNR)及磁化传递率(MTR)。结果SE序列T1WI上,附加MT脉冲后正常肝实质信号强度降低,SNR低于无MT脉冲图像(P=0.002);肝硬化组织附加MT后信号强度显著下降,SNR明显低于无MT时(P=0.000);肝癌附加MT后SNR两者无显著差异(P-0.334),CNR较附加MT前降低但无统计学差异(P-0.158)。FSE序列T2WI上,正常肝实质附加MT后信号强度降低,SNR低于无MT脉冲时(P=0.021);肝硬化附加MT后SNR显著低于无MT时(P=0.000);肝癌附加MT脉冲前后信号强度无明显变化,SNR无统计学差异(P=0.549),CNR较附加MT前增高,但两者间无显著差异(P=0.205)。SE序列T1WI上,肝硬化MTR显著高于正常肝实质及肝癌(P=0.001);正常肝实质与肝癌MTR类似(P=0.788)。FSE序列T2WI上,硬化肝组织的MTR较正常肝实质及肝癌明显增高(P=0.002;P=0.000);正常肝实质与肝癌的MTR无统计学差异(P=0.352)。结论FSE序列T2WI附加MT脉冲图像上肝硬化组织信号降低,而肝癌信号强度变化不明显,对比度提高。有利于肝硬化背景上肝癌病灶的检出和显示。 相似文献
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椎管内脊膜囊肿的MRI诊断价值 总被引:4,自引:0,他引:4
目的:分析椎管内脊膜囊肿的MR表现特点,并对其发生及MRI诊断价值进行讨论。材料与方法:本组18例,男12例,女6例,年龄7~59岁,平均32.5岁。MR扫描采用SE序列T1WI、T2WI矢状面和轴面扫描。6例加做MR增强扫描。结果:18例均经手术病理证实,并按Nabors方法分为3型:Ⅰ型为不伴神经根纤维的硬脊膜外囊肿,又分2个亚型:Ⅰa型和Ⅰb型。其中椎管内硬膜外脊膜囊肿(Ⅰa型)3例,骶管内脊膜囊肿(Ⅰb型)8例;Ⅱ型为伴神经根纤维的硬脊膜外囊肿(3例);Ⅲ型为椎管内硬膜下脊膜囊肿(4例)。椎管内脊膜囊肿可为长条状囊袋形、卵圆形或不规则形等,囊液信号与脑脊液信号相似,T1WI呈低信号,T2WI呈高信号。可引起椎管扩大,并致脊髓或椎体受压,引起硬膜外脂肪移位。结论:MRI是椎管内脊膜囊肿最好的检查方法之一,其影像表现较具特征性,正确认识其MR征象能达到术前诊断,并指导治疗。 相似文献
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目的 研究诱发性大鼠肝硬化性肝癌超顺磁性氧化铁(SPIO)增强MRI与电镜表现. 材料与方法 16只由二乙基亚硝胺(DENA)诱导的肝硬化性肝癌大鼠行肝脏SPIO增强前后MR扫描,再行肝脏病理学及电镜检查. 结果 肝癌在T1WI上为低或等低信号,T2WI为较高信号.SPIO增强T2WI上,正常肝实质、肝硬化组织信号强度(SI)较增强前明显下降,肝癌SI较增强前无明显下降,其对比噪声比(CNR)升高,病变显示清晰.SPIO增强T1WI上正常肝实质及硬化肝组织SI无明显下降,肝癌SI较增强前升高,其CNR较增强前降低,病变显示不清楚.电镜下正常肝组织枯否细胞(KC)内溶酶体丰富,可见较多黑色颗粒状SPIO粒子,胞浆内可见大的SPIO簇.肝硬化组织细胞间隔增宽,胶原纤维明显增多,KC数量无明显减少,其内溶酶体有所减少,可见散在SPIO粒子,胞浆内可见较大的SPIO簇.肝癌组织KC数量减少或消失,癌细胞内细胞器基本消失,核异型. 结论 诱导性大鼠肝硬化性肝癌MR信号表现与人类肝癌相似.SPIO增强肝脏信号改变和KC数量及吞噬功能有一定关系.SPIO增强T2WI不仅能提高肝癌的对比,且能间接反映KC数量,可以预测肝癌组织学分级. 相似文献
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Esophageal'and cardiac cancer are the very commondiseases in China. The mortality of the esophageal canceris 23.40/100000, and is the 23.53% of the mortality of allcancers. Over 80% patients are beyond 50 years old. Thehighest mortality is seen in 50--69 years old, and this~ality is over 60% of the total. Unsatisfactoryresectional rate and more complications make the survivalrate lower. Anastomotic leakage and stenosis are the mostdangerous complications. From June, 1986 to October,1998, we … 相似文献
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