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  • Electronic Resource  (6)
  • Cerebrovascular disease  (2)
  • Fornix  (2)
  • Key words Aneurysm  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 19 (1997), S. 105-109 
    ISSN: 1279-8517
    Keywords: Brain asymmetry ; Fornix ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This article reports the observation that there is a left/right asymmetry of the anterior columns of the fornix in the human brain. This asymmetry is present in the position of the two columns of the fornix in relation to the septum pellucidum. The left columna fornicis was found to be located caudal to the right, and this can be readily visualized on axial MRI scans. This difference was seen in most of the subjects, but in some subjects there was no left/right-difference and in a few the asymmetry was inverse. The asymmetry of the fornix with respect to the anterior-posterior axis was independent of the well-known dissimilar lateral ventricular volumes. However, the left/right difference in the position of the fornix was evident in subjects with or without differences in ventricular volumes. This suggests that the mechanism underlying the development of asymmetry of the fornix is independent of the mechanism leading to ventricular asymmetry. So far, no functional relevance has been ascribed to such differences in location. The finding is gaining interest in connection with recent reports of asymmetries in hippocampal subfields. Studies of fornical lesions should therefore give attention to possible side-to-side differences.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 19 (1997), S. 105-109 
    ISSN: 1279-8517
    Keywords: Brain asymmetry ; Fornix ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Cet article rapporte l'existence d'une asymétrie droite/gauche des colonnes du fornix chez l'Homme. Cette asymétrie apparaît dans les plans en relation avec le septum pellucidum. Le pilier gauche du fornix apparaît en position plus caudale que le droit et ceci peut être bien visualisé sur des coupes IRM axiales. Cette différence existait chez la plupart des sujets. Chez certains, il n'y avait pas de différence gauche/droite et chez quelques sujets, l'asymétrie était inversée. L'asymétrie du fornix dans le sens antéropostérieur était indépendante de l'asymétrie bien connue des volumes ventriculaires latéraux. Quoi qu'il en soit, l'asymétrie droite/gauche de la position des piliers du fornix était évidente chez les sujets qui présentaient où ne présentaient pas de différence de volume ventriculaire. Ceci suggère que le mécanisme sousjacent du développement de l'asymétrie du fornix est indépendante du mécanisme conduisant à l'asymétrie ventriculaire. De plus, aucune conséquence fonctionnelle n'a été décrite en rapport avec de telle différence. Ces résultats sont rapprochés aux études récentes concernant les asymétries des champs hippocampiques. Les études de lésions du fornix devraient par la suite tenir compte de ces différences droite ou gauche.
    Notes: Summary This article reports the observation that there is a left/right asymmetry of the anterior columns of the fornix in the human brain. This asymmetry is present in the position of the two columns of the fornix in relation to the septum pellucidum. The left columna fornicis was found to be located caudal to the right, and this can be readily visualized on axial MRI scans. This difference was seen in most of the subjects, but in some subjects there was no left/right-difference and in a few the asymmetry was inverse. The asymmetry of the fornix with respect to the anterior-posterior axis was independent of the well-known dissimilar lateral ventricular volumes. However, the left/right difference in the position of the fornix was evident in subjects with or without differences in ventricular volumes. This suggests that the mechanism underlying the development of asymmetry of the fornix is independent of the mechanism leading to ventricular asymmetry. So far, no functional relevance has been ascribed to such differences in location. The finding is gaining interest in connection with recent reports of asymmetries in hippocampal subfields. Studies of fornical lesions should therefore give attention to possible side-to-side differences.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1084
    Keywords: White matter lesions ; Cerebrovascular disease ; Magnetic resonance imaging ; Brain infarction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To establish data about prevalence, number and topography of “unspecific” white matter lesions as seen on MRI, the T2-weighted MRI scans of 83 patients with hyperintense focal white matter changes were reviewed. Patients with known inflammatory central nervous system disease were excluded. There was an approximately linear increase in prevalence and number of lesions with age. Prevalence ranged from 18% in the third decade to over 90% in those over 70 years. We found a close correlation with concomitant periventricular hyperintensity. However, rating of Virchow-Robin spaces did not correlate with the number of white matter lesions. Both hemispheres were involved nearly equally with a minimal non-significant right side preponderance. Lesions showed a strong predilection for the frontal and parietal paraventricular “watershed” areas.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1920
    Keywords: Key words Aneurysm ; intracranial ; Haemorrhage ; subarachnoid ; Aneurysm ; de novo ; Risk factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Although aneurysms are widely considered to be of congenital origin there is still debate as to whether some at least might be formed de novo during life. A review of all 49 reported cases plus one previously unpublished case reveals common clinical features and might aid in the management of this group of patients. Statistical analysis of all 50 cases of de novo aneurysms discloses a more frequent history of smoking (P = 0.0007) and arterial hypertension (P = 0.0026) than in a control cohort. Patients with de novo aneurysms are younger (P 〈 0.0001); the proportion with multiple aneurysms was 28 %. Of de novo aneurysms 44 % became symptomatic 3–6 years after the first subarachnoid haemorrhage (SAH), and the interval was significantly shorter in hypertensive patients. We suggest that young patients with a history of SAH and arterial hypertension and nicotine abuse should therefore be considered for conventional angiography after a 5-year interval. MRA might not be useful due to clip artefacts from even nonferromagnetic clips. Close control of blood pressure is essential in these patients.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1920
    Keywords: Cardiac myxoma ; Stroke ; Cerebrovascular disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Six of 12 patients with histologically verified left atrial myxoma showed CT and MRI evidence of ischemic lesions of varying size and location, predominantly in the left hemisphere.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Aneurysma ; vertebrobasilär ; Embolisation ; Operation ; Key words Aneurysm ; vertebrobasilar ; Embolization ; Surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Purpose: Evaluation of clinical and morphological results in 44 consecutive patients with 45 aneurysms of the posterior circulation. Methods: Retrospective analysis of patient charts and angiograms of all vertebrobasilar aneurysms diagnosed in our department between 10/95 and 08/99. All aneurysms were treated. Results: 36/44 pts had a hemorrhage. Hunt/Hess (HH) gradings were as follows: HH1 in 10, HH2 in 6, HH3 in 9, HH4 in 10 cases, and HH5 in 1 case. 38 pts with 39 aneurysms were treated exclusively in the endovascular way, 3 pts with 3 aneurysms were operated on. 3 patients had to be operated upon following insufficient endovascular treatment. Endovascular treatment resulted in 63% total and 27% subtotal occlusions, results being stable in 85%. For our pts as a whole, the grading according to the Glasgow Outcome Scale (GOS) was GOS1 in 4, GOS3 in 8, GOS4 in 7, and GOS5 in 25 cases. Conclusion: Despite a less favourable clinical status of pts pre-treatment, the results of our interdisciplinary concept compare favourably with those of other surgical or interventional groups.
    Notes: Zusammenfassung Fragestellung: Klinische und morphologische Ergebnisse der endovaskulären Behandlung bei 44 konsekutiven Patienten mit 45 Aneurysmen der hinteren Zirkulation. Methodik: Retrospektive Auswertung der Krankenblätter und Angiogramme aller von 10/95 bis 08/99 diagnostizierten vertebrobasilären Aneurysmen. Alle Aneurysmen wurden behandelt. Ergebnisse: Bei 36/44 Patienten lag eine Blutung vor. Die Graduierung entsprach in 10 Fällen HH1 nach Hunt/Hess (HH), in 6 Fällen HH2, in 9 Fällen HH3, in 10 Fällen HH4 und in 1 Fall HH5. 38 Patienten mit 39 Aneurysmen wurden ausschließlich endovaskulär, 3 Patienten mit 3 Aneurysmen ausschließlich operativ behandelt. 3 Patienten mit 3 Aneurysmen mußten wegen unbefriedigender endovaskulärer Behandlung anschließend operiert werden. Endovaskulär konnten 63% der Aneurysmen total, weitere 27% subtotal ausgeschaltet werden, in 85% war das Behandlungsergebnis stabil. Für die gesamte Patientengruppe entsprach die Graduierung nach der Glasgow Outcome Skala (GOS) in 4 Fällen GOS1, in 8 GOS3, in 7 GOS4 und in 25 Fällen GOS5. Schlußfolgerungen: Trotz eines schlechteren klinischen Ausgangszustands der Patienten vor Behandlung sind die Ergebnisse unseres interdisziplinären Konzepts vergleichbar mit denen operativer oder interventioneller Arbeitsgruppen.
    Type of Medium: Electronic Resource
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