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Corpus callosal infarction:appearances and diagnostic value of MR imaging

ZOU Jie,WANG Bai jun,LI Lin.Department of Radiology,Shenyang Railway Central Hospital,Shenyang 110032,P.R.China  
Objective:To investigate the features and diagnostic value of MRI in corpus callosal infarction.Methods:MRI features of 36 patients with corpus callosal infarction were retrospectively analyzed,which were selected from 569 consecutive cranial MR scans showing cerebral infarcts.SE and TSE sequences were performed on all 36 cases,FLAIR on 15 of them,Gd DTPA enhancement examinations were performed in 13 cases.Results:Of 569 patients with cerebral infarcts collected during the 24 months,36 patients (6.3%) had a MRI identificable callosal infarction.In 3 cases the infarction located only in the corpus callosum,in 33 cases the lesion associated with cerebral infarct in other location.Totally 45 lesions were found in 36 cases,The lesions appear slight hypointense (26) or hypointense (19) on T 1WI,all of them appear hyperintense on T 2WI and some hyperintense or hypointense on FLAIR.Conclusion:Infarcts of the corpus callosum are not common.MRI can clearly reveal the lesions,their location and extent.But MRI findings of corpus callosal infarction are nonspecific,definite diagnosis of corpus callosal infarction depends on combination of clinical data and existence of infarction in the other area of brain.
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