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Value of rectal magnetic resonance hydrography for diagnosis and staging of rectal carcinoma

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Author:
No author available
Journal Title:
WORLD CHINESE JOURNAL OF DIGESTOLOGY
Issue:
17
DOI:
10.3969/j.issn.1009-3079.2007.17.009
Key Word:
直肠癌;分期;磁共振水成像

Abstract: 目的:探讨磁共振(MRI)水成像(MRH)对直肠癌术前诊断和分期的价值.方法:对临床确诊为直肠癌的患者34例进行MRI水成像检查,检查前经直肠注入生理盐水300 mL左右,先作盆腔常规轴位平扫,再作磁共振直肠水成像扫描,扫描完后再作轴位、矢状位和冠状位增强扫描.结果:34例直肠癌均能显示原发病灶,三维成像病变部位肠腔内不规则充盈缺损32例,19例病变远侧端呈"袖口征"及"截断征".轴位30例表现为腔内软组织肿块,26例表现为肠壁不规则增厚,肠腔环形狭窄.MRI水成像检查对T1,T2,T3,T4期肿瘤的准确度分别为66.7%(2/3),76.9%(10/13),86.7%(13/15),100%(3/3),总准确性为82.4%(28/34);判断淋巴结转移的敏感性、特异性和准确性分别为69.2%(18/26),62.5%(5/8),67.6%(23/34);对邻近组织脏器浸润、远处转移判断的准确度分别为94.1%(32/34)、97.1%(33/34).结论:MRI水成像加常规平扫加增强扫描对直肠癌的诊断和分期有较大价值,可以较准确地判断肿瘤在肠壁的浸润深度及盆腔内淋巴结的转移.

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