Diffusion-weighted MR in reversible wernicke encephalopathy.
Neuroradiology
; 43(11): 969-72, 2001 Nov.
Article
em En
| MEDLINE
| ID: mdl-11760803
ABSTRACT
Diffusion-weighted images (DWI) of a patient with Wernicke encephalopathy were obtained during routine MR examination. Mammillary bodies were hyperintense on T2-weighted and enhanced on T1-weighted images; on DWI, a mild hyperintensity was noticed. Calculation of the apparent diffusion coefficient (ADC) demonstrated an increased diffusion on the affected regions; the hyperintensity on DWI was probably due to a "T2-shine-through" effect. These findings are consistent with the presence of extracellular oedema, without significant neuronal damage. The patient recovered promptly after thiamine administration, and MR alterations disappeared. The favourable evolution indicates that no relevant neuronal death occurred. This is consistent with DWI findings. DWI are more sensitive than ordinary T1- and T2-weighted images to neuronal irreversible damage, and may differentiate between neuronal necrosis and extracellular oedema in various brain pathologies. The demonstration of a limited neuronal damage may represent a favourable prognostic factor in patients with WE.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Encefalopatia de Wernicke
/
Encéfalo
Tipo de estudo:
Etiology_studies
/
Prognostic_studies
Limite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Neuroradiology
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Itália