Zusammenfassung
Die superfizielle Siderose des ZNS ist ein seltenes Krankheitsbild, bei dem es durch chronisch rezidivierende Subarachnoidalblutungen (SAB) zu oberflächlichen Ablagerungen von Hämosiderin an Großhirn, Kleinhirn und Rückenmark kommt. Bekannte Blutungsquellen sind ZNS-Tumoren, Gefäßmalformationen, Nervenwurzelläsionen und neurochirurgische Eingriffe. Der Blutungsquellennachweis gelingt nur in etwa 50% der Fälle. Klinisch kommt es zu progredientem sensoneuralem Hörverlust, zerebellärer Ataxie und Pyramidenbahnläsionen. Im Liquor können Ferritin und freies Eisen erhöht sein. Die kraniale und spinale Kernspintomographie erlaubt den sensitiven und spezifischen Nachweis der Hämosiderinablagerungen. Einzig die Elimination der Blutungsquelle scheint die Progression der meist irreversiblen Symptomatik verhindern zu können. Daher sollte frühzeitig und gründlich nach der Blutungsquelle gesucht werden. Es werden 2 Kasuistiken vorgestellt und eine Übersicht über die Literatur gegeben.
Summary
Superficial siderosis of the CNS is a rare disease. The superficial deposition of haemosiderin in the cerebrum, cerebellum and spinal cord is due to chronic and recurrent subarachnoidal haemorrhage (SAH). Known sources of bleeding are vascular CNS-tumours, CSF-cavity lesions, vascular malformations, nerve root lesions and neurosurgical interventions. Detection of the source of bleeding is successful in only about 50% of cases. The clinical syndrome is characterized by sensorineural deafness, cerebellar ataxia and pyramidal signs. CSF-investigation might be indicative for SAH, while ferritin and ionic iron can be elevated in the CSF. CT is unspecific and insensitive but MR imaging of the brain and spinal cord is very sensitive and specific. The elimination of the source of bleeding alone might prevent the progression of the disease, therefore, an early and extensive search for this source is highly recommended.
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Hug, A., Hartmann, M. & Grau, A. Superfizielle Siderose des ZNS—2 Kasuistiken und eine Übersicht über die Literatur. Nervenarzt 75, 584–588 (2004). https://doi.org/10.1007/s00115-003-1559-5
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DOI: https://doi.org/10.1007/s00115-003-1559-5