Hirose Y, Mokuno K
Department of Neurology, Toyohashi Municipal Hospital.
Rinsho Shinkeigaku. 1998 Feb;38(2):157-60.
We described early features of MRI diffusion weighted images (DWIs) in three patients with lateral medullary infarction. Patient 1. A 65-year-old woman who complained of vertigo was admitted. Then, DWIs showed a high signal intensity in the right lateral medulla, though T2 weighted images (T2WIs) did not show any abnormalities. On the next day, when the typical symptoms and signs of lateral medullary infarction appeared, the lesion was recognized on both DWIs and T2WIs. Patient 2. A 48-year-old man was admitted 9 hours after he had dizziness, nausea, and repeated vomitings. When a diagnosis of Wallenberg syndrome was made on the neurological examination, MRI DWIs demonstrated a high signal intensity in the right lateral medulla. The lesion became apparent on T2WIs 82 hours after the onset. Patient 3. A 71-year-old man was admitted for nausea, dizziness, and repeated vomitings. A diagnosis of Wallenberg syndrome was made fifty eight hours after the onset, a lesion with high signal intensity in the right lateral medulla was evident on DWIs, but it was faint on T2WIs. We concluded that DWIs is useful in early diagnosis of lateral medullary infarction presenting Wallenberg syndrome.
我们描述了3例延髓外侧梗死患者的MRI弥散加权成像（DWI）早期特征。患者1，一名65岁女性，因眩晕入院。当时，DWI显示右侧延髓外侧高信号，而T2加权成像（T2WI）未显示任何异常。次日，当延髓外侧梗死的典型症状和体征出现时，DWI和T2WI上均发现了病变。患者2，一名48岁男性，在出现头晕、恶心和反复呕吐9小时后入院。经神经学检查诊断为延髓外侧综合征时，MRI DWI显示右侧延髓外侧高信号。发病82小时后，T2WI上病变变得明显。患者3，一名71岁男性，因恶心、头晕和反复呕吐入院。发病58小时后诊断为延髓外侧综合征，DWI上右侧延髓外侧可见高信号病变，但T2WI上病变较淡。我们得出结论，DWI有助于早期诊断表现为延髓外侧综合征的延髓外侧梗死。
