Summary
We have reported the case of an infant with bilateral temporal arachnoid cysts. In addition to the characteristic angiographic findings at both sides, a very distinct accumulation of radiopharmacon (99mTc-pertechnetate) in one cyst was demonstrated by routine intravenous scintigraphy. Previous complicating haemorrhage in the cyst appears to have caused both local high protein content and thickening of the arachnoidal wealls with increased vascularisation, thus leading to a positive brainscan. A repeated scintigraphic examination after removal of the lesion showed no abnormalities.
Résumé
Les auteurs rapportent le cas d'un enfant présentant des kystes arachnoïdiens temporaux bilatéraux. Associée aux caractéristiques angiographiques bilatérales, la scintigraphie de routine par voie intraveineuse (99mTc pertechnetate) a démontré une nette accumulation du produit radio-actif dans l'un des kystes. Des complications hémorragiques antérieures à l'intérieur du kyste ont occasionné augmentation du taux des protéines et un épaississement de l'arachnoïde avec une vascularisation augmentée, se traduisant par un foyer à la scintigraphie. Un contrôle scintigraphique après ablation de la lésion se révèla normal.
Zusammenfassung
Fallbeschreibung eines Kindes mit doppelseitiger temporaler Arachnoideal-Cyste. Neben den typischen angiographischen Befunden kam es zu einer umschriebenen Anreicherung von 99mTc in einer Cyste. Diese Anreicherung wurde wahrscheinlich hervorgerufen durch eine vorausgehende Blutung in dieser Cyste.
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Tuynman, F.H.B., Hekster, R.E.M. & Pauwels, E.K.J. Intracranial arachnoid cyst of the middle fossa demonstrated by positive 99mTc brainscintigraphy. Neuroradiology 7, 41–44 (1974). https://doi.org/10.1007/BF00344674
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DOI: https://doi.org/10.1007/BF00344674