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Published on: December 9, 2010
Conventional and diffusion-weighted MRI in the evaluation of methanol poisoning
A Server1, K E Hovda, P Hj Nakstad
1Departments of Neuroradiology, Division of Radiology, and Medicine, Ullevål University Hospital, Oslo, Norway. Andres.ServerAllonso@ulleval.no
Abstract:
Cerebral lesions were studied in 2 methanol-poisoned patients using conventional magnetic resonance imaging (MRI). In 1 patient, diffusion-weighted MRI (DWI) was also performed. In this patient, conventional MRI showed symmetrical, bilateral increased signal in the lentiform nuclei, involving predominantly putamina, but also extending into the corona radiata, centrum semiovale and subcortical white matter. DWI showed decreased diffusion, which most probably reflects cytotoxic edema. In the other patient, fluid attenuated-inversion recovery (FLAIR) and T2-weighted images showed hyperintensity in the putamina, characteristic of post-necrotic changes.
Insights
Methanol poisoning can cause cerebral lesions, particularly in the putamina. Magnetic resonance imaging (MRI) revealed cytotoxic edema and post-necrotic changes in two patients, highlighting the neurotoxic effects of methanol.
Area of Science:
- Neurology
- Radiology
- Toxicology
Background:
- Methanol poisoning is a serious condition that can lead to severe neurological deficits.
- Magnetic resonance imaging (MRI) is a crucial tool for diagnosing and understanding the extent of brain damage.
Observation:
- Two cases of methanol poisoning were examined using conventional MRI.
- Diffusion-weighted MRI (DWI) and fluid-attenuated inversion recovery (FLAIR) sequences were utilized.
Findings:
- Conventional MRI revealed symmetrical, bilateral increased signals in the lentiform nuclei (predominantly putamina) extending to surrounding white matter in one patient.
- Diffusion-weighted MRI (DWI) indicated decreased diffusion in these areas, suggesting cytotoxic edema.
- The second patient exhibited putaminal hyperintensity on FLAIR and T2-weighted images, indicative of post-necrotic changes.
Implications:
- These findings underscore the characteristic neuroimaging patterns of methanol-induced brain injury.
- MRI, including DWI, is valuable for early detection and characterization of cerebral lesions in methanol poisoning.
- Understanding these patterns aids in clinical management and prognosis assessment for methanol-exposed individuals.
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