胼胝体梗死的临床和影像学分析

The clinical and imaging analysis of the corpus callosum infarction

目的:探讨胼胝体梗死的临床和影像学特点,提高对胼胝体梗死的认识。方法:对30例胼胝体梗死患者的临床和CT、MRI、MRA资料进行回顾性分析。结果:胼胝体梗死均为单侧,按范围可分腔隙性和弥漫性。腔隙性梗死灶位于胼胝体膝部6例,体部4例,压部14例,弥漫性梗死同时累及单侧胼胝体膝、体部5例,单侧膝、体、压部1例。CT表现为圆形、卵圆形或条带状低密度影,MRI表现为T1WI像呈低信号,T2WI及水抑制序列呈高信号,CT、MRI增强扫描后无或轻度不均匀强化。MRA对弥漫性梗死可显示供血动脉不规则狭窄或闭塞。结论:CT、MRI和MRA对胼胝体梗死的诊断有重要价值。

Objective：To investigate the clinical and radiolngical features and to improve the knowledge of corpus callosum infarction. Methods： A retrospective analysis of clinic and radiological features was conducted in 30 cases of corpus callosum infarction. Results： Corpus callosum infarction occurred single-lateral in all cases which can be divided into lacunar infarction and diffuse infarction. The lacunar infarction located in genu（n = 6）, body（n = 4） and splenium（n = 14）. The diffuse infarction located in genu and body（ n = 5）, in genu, body and splenium（n = 1 ） simultaneously. CT revealed a local low - density area in which was round or ovoid or stripe in shape. T1 weighted MR imaging revealed hypointense lesion within the corpus callosum that was hyperintense on the T2 weighted and FLAIR sequences imaging and subtle irregular enhancement on the post-eontrast T1 weighted imaging. MRA revealed the irregular stenosis or occlusion of the supplying artery in connection with diffuse infarction. Conclusion： CT, MRI and MRA have important value for diagnosing corpus callosum infarction.