ISSN:
1432-1920
Keywords:
Arachnoid cyst
;
Computed tomography
;
Magnetic resonance imaging
;
Brain atrophy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Arachnoid cysts situated in the middle cranial fossa constitute the largest group of this type of lesion. Their origin has been the subject of debate since they were first described. There is still controversy as to whether they originate directly from the meninges adjacent to the temporal pole or whether partial agenesis of the temporal lobe favours secondary formation of the cyst. We assessed the morphology of the temporal lobe and the bulging of the squamous temporal bone. “Paradoxical changes” in adjacent-bone, described as very rare findings in arachnoid cysts of the middle cranial fossa, were common in our study and suggest, in association with direct signs of temporal atrophy, that this atrophy precedes, or is at least coexistent with, the formation of the cyst. The importance of being able to determine the origin of the cyst lies in its being a factor to assess as regards treatment.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00588369
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