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Transient enlargement of deep medullary veins in encephalitis

Dilatation transitoire des veines medullaires profondes dans un cas d'encephalite

Vorübergehendes Auftreten der tiefen medullaren Venen bei Enzephalitis

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Summary

This case report concerns a woman who presented an atypical clinical pattern with some features of encephalitis and other features of brain tumor. Cerebral angiography showed a unilateral cerebral mass with prominence of deep medullary veins, usually interpreted as evidence of a neoplasm. Brain biopsy was interpreted as astrocytoma. Subsequent spontaneous clinical remission and regression of angiographic findings led to a reappraisal of the microscopic interpretation with a final diagnosis of encephalitis. The pathogenesis of cerebral angiographic abnormalities observed with encephalitis is reviewed. The transient prominence of deep medullary veins is probably due to hyperemia. Followup angiography is recommended when encaphalitis is suspected.

Résumé

Cet article rapporte le cas d'une femme dont le tableau clinique, atypique, comportait des signes évoquant une encéphalite et d'autres une tumeur cérébrale. L'angiographie cérébrale objectivait une masse cérébrale unilatérale et une dilatation des veines médullaires profondes, habituellemant interprêtée comme un signe de néoplasme. Le diagnostic d'astrocytome fut porté à l'examen de la biopsie cérébrale. Par la suite, une rémission clinique spontanée et une régréssion des signes angiographiques furent constatées, ce qui a une réévaluation de l'examen microscopique et au diagnostic final d'encéphalite. La pathogenie des anomalies angiographiques cérébrales observée en cas d'encéphalite est passée en revue. La dilatation transitoire des veines médullaires profondes est probablement due à l'hyperhémia. La répétition a distance de l'angiographie est recommandée lorsque le diagntic d'encéphalite est suspecté.

Zussamenfassung

Dieser Bericht betrifft den Fall einer Frau deren Erkrankung teilweise als Enzdphalitis, teilweise als Hirntumor angesehen wurde. Zerebrale Angiographie zeigte eine einseitige zerebrale Masse mit hervorstehenden tiefen medullaren Venen, gewöhnlich als Beweis einer bösartigen Geschwulst angenommen. Biopsie wurde als Astrozytom gelesen. Spontane Remission und Zurückgehen der angiographischen Befunde führten zu einer Revision der mikroskopischen Diagnose als Enzephalitis. Die Pathogenese der abnormalen zerebralen angiographischen Befunde wird diskutiert. Das vorübergehende Auftreten der tiefen medullaren Venen ist wahrscheinlich durch die Hyperämie bedingt. Nachfolgende Angiographie ist empfohlen, wenn ein Verdacht auf Enzephalitis besteht.

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Bentson, J.R., Hasso, A.N. Transient enlargement of deep medullary veins in encephalitis. Neuroradiology 9, 217–222 (1975). https://doi.org/10.1007/BF00346151

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