[Hypertrophic olivary degeneration. MR imaging findings and temporal evolution]. / Degenerescence olivaire hypertrophique. Aspect IRM et évolution temporelle.
J Neuroradiol
; 32(1): 67-72, 2005 Jan.
Article
em Fr
| MEDLINE
| ID: mdl-15798618
ABSTRACT
PURPOSE:
to describe the magnetic resonance imaging features of hypertrophic olivary degeneration (HOD) subsequent to lesion in the "Guillain-Mollaret triangle". MATERIALS ANDMETHODS:
15 cases of HOD were diagnosed at MR imaging in 12 patients (4 women and 8 men) with posterior fossa lesion. The time interval from the beginning of the disease to the MR examination was 3 weeks to 8 (1/2) years. Evaluation of the changes in signal intensity over time of the lesions was available in 6 patients.RESULTS:
Nine cases of HOD were unilateral and three were bilateral. HOD was associated to a lesion of the contralateral dentate nucleus in 8 cases, to a lesion of the ipsilateral central tegmental tract in 5 cases and to a lesion of the contralateral superior cerebellar peduncle in 2 cases. Hyperintensity and hypertrophy of the olive on proton density and T2-weighted images appeared as early as 3 weeks after the ictus. A curved central hyperintensity (CCH) could be observed 7 months after the initial presentation. Decrease in the signal intensity was observed after 3 (1/2) years and abnormal signal intensity could persist for up to 13 years. Palatal myoclonus at 5 months was associated with HOD in one case.CONCLUSION:
HOD is considered a trans-synaptic degeneration subsequent to lesions in the Guillain-Mollaret triangle. Hyperintensity and hypertrophy of the olive are observed, sometimes with palatal myoclonus.
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Base de dados:
MEDLINE
Assunto principal:
Núcleo Olivar
/
Imageamento por Ressonância Magnética
/
Degeneração Neural
Tipo de estudo:
Diagnostic_studies
Limite:
Female
/
Humans
/
Male
Idioma:
Fr
Revista:
J Neuroradiol
Ano de publicação:
2005
Tipo de documento:
Article