False-negative diffusion-weighted imaging with lateral medullary infarction

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False-negative diffusion-weighted imaging with lateral medullary infarction.

A 55-year-old1 man awoke with left ear pain, vertigo, vomiting, left facial numbness, and ataxic gait. MRI including diffusionweighted imaging (DWI) performed 2 hours later showed no evidence of acute infarction (figure, A). Repeat MRI 2 days later showed DWI and FLAIR changes consistent with a left lateral medullary infarction (figure, B). False-negative DWI has been reported in 5% of ischemic...

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Diffusion Weighted Imaging Findings in the Acute Lateral Medullary Infarction

BACKGROUND AND PURPOSE Negative findings on diffusion-weighted imaging (DWI) does not exclude the possibility of brainstem infarction, particularly in the acute stage of medullary lesion. Our aim was to investigate the false-negative rate of DWI in patients with acute lateral medullary infarction. METHODS We applied DWI to 26 patients with a clinical diagnosis of lateral medullary infarction ...

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Early False-Negative Diffusion-Weighted Imaging in Pontine Medial Longitudinal Fasciculus Infarction

A81-year-old man with multiple cardiovascular risk factors presented to the emergency department with true vertigo, binocular horizontal diplopia and ataxic gate 5 hours after onset of symptoms. He was alert and his general and neurological exam was unremarkable except for his ocular motility and gait. On left lateral gaze, he had limited adduction in right eye, but left eye was fully abducting...

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Perfusion weighted imaging in the assessment of the pathology and outcomes of lateral medullary infarction

This series case report aimed to elucidate the underlying pathology and outcomes of lateral medullary infarction (LMI) using perfusion weighted imaging (PWI). Four patients were diagnosed with LMI based on high-field diffusion-weighted magnetic resonance imaging (MRI-DWI) and PWI. The national institutes of health stroke scale (NIHSS) scores were recorded on days 1, 7, and 30, and the Barthel i...

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False-negative diffusion-weighted MR findings in acute ischemic stroke.

BACKGROUND AND PURPOSE Lesions associated with acute stroke are often missed by diffusion-weighted imaging (DWI), suggesting that the sensitivity of this technique for detecting acute ischemic stroke may not be as high as initially thought. Our aim was to estimate the rate of false-negative DWI studies in patients with persistent neurologic deficit due to an ischemic stroke and to identify whic...

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ژورنال

عنوان ژورنال: Neurology

سال: 2006

ISSN: 0028-3878,1526-632X

DOI: 10.1212/01.wnl.0000244494.50684.5b