Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Immunohistochemistry  (4)
  • Brain death  (2)
  • Recurrence intervals  (2)
  • 1
    ISSN: 1437-2320
    Keywords: Brain death ; Malignant brain swelling ; Temporal pattern ; Hirntod ; Maligne verlaufende Hirnschwellung ; Zeitverläufe
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Dynamik der therapeutisch nicht beeinflußbaren Hirnschwellung wurde an 96 autopsierten Fällen analysiert. Sie waren aus einem großen Material von Hirntod-Fällen nach folgenden Gesichtspunkten ausgewählt worden: die Initialläsion wie auch der Eintritt des Hirntodes waren zeitlich genügend scharf bestimmbar, sie hatten weder Entzündungen noch Tumoren oder Hirnoperationen, sie waren nicht Kinder unter 1 Jahr und sie hatten keine sekundären Infarkte oder Rezidivblutungen nach einer Aneurysma-Ruptur. Die Daten zeigen eine ausgeprägte Variation des Zeitintervalles von der Primärläsion bis zum Eintritt des Hirntodes. Sie reicht von 0 Stunden bis zu 11 Tagen mit einem Medianwert von 24 Stunden. Diese Intervalle sind unabhängig von Art und Schwere der Initialläsion (Tab. I) und vom Alter (Tab. II) mit Ausnahme von Kindern unter 10 Jahren, die nach Kürzerer Zeitdauer gestorben waren. Der Schwellungsprozeß zeigt also eine Eigendynamik, die aber wegen der großen Variation nicht durch stetige Progression erklärt werden kann. Die Analyse der Zeitspannen mit Hilfe des Weibull-Wahrscheinlichkeitsnetzes (Abb. 2) zeigt eine bimodale Häufigkeitsverteilung, die aus der Überlagerung von 2 Faktoren zu erklären ist, nämlich: 1. dem Hirnödem und 2. dem finalen Verlust der Autoregulation der Hirngefäße mit irreversibler Schwellung des Gehirns und hochgradiger intrakranieller Druckerhöhung. Im Durchschnitt verläuft die maligne, letal endende Hirnschwellung rascher als das übliche Hirnödem. Sie wird aber bis zu 11 Tagen beobachtet, ohne daß Hinweise auf sekundär entstandene Hirnschäden vorliegen.
    Notes: Summary The dynamics of brain swelling which does not respond to any form of treatment was analysed in 96 autopsy cases. These were selected from many cases of brain death, according to the following criteria: the time of occurrence of the initial lesion, as well as the onset of brain death, could be precisely determined; the patients had no inflammation, tumour of the brain or previous brain operation; there were no children under one year of age and there were no secondary infarctions or recurrences of bleeding after rupture of an aneurysm. The findings show a wide variation in the period of time between the primary lesion and the onset of brain death. This ranges from zero hours to eleven days, with a median of 24 hours. These intervals are independent of the nature and severity of the lesion (Table I) and of the age (Table II) with the exception of children under ten years, who died after a shorter interval. This process of brain swelling appears to show inherent dynamics, which because of the great variation cannot be explained by a steady progression. The analysis of the time intervals on Weibull-probability graph-paper (Figure 2) shows a bimodal frequency distribution, which can be explained by the superimposition of two factors, namely (i) brain oedema and (ii) a final loss of autoregulation of the cerebral vessels with irreversible swelling of the brain and severe intracranial hypertension. On average, this malignant and fatal brain swelling advances more rapidly than the “ordinary” brain oedema, but it can be observed up to eleven days without any signs of secondary damage to the brain.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 434 (1999), S. 551-560 
    ISSN: 1432-2307
    Keywords: Key words Systemic amyloidosis ; Brain ; Circumventricular organs ; Choroid plexus ; Immunohistochemistry ; Aβ colocalization.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Amyloid deposits in cerebral vessels are common in β-amyloid diseases (Alzheimer’s disease, congophilic amyloid angiopathy, Down’s syndrome and hereditary cerebral amyloidosis with haemorrhage of the Dutch type). We report of 20 autopsies on patients who had died with systemic amyloidosis of the AA, Aλ and Aκ types: the brains were examined for the occurrence of amyloid. Vascular amyloid was detected in choroid plexus (in 17 of 20 cases), infundibulum (5 of 8), area postrema (6 of 11), pineal body (3 of 7) and subfornical organ (2 of 3), but not in cortical and leptomeningeal vessels. Immunohistochemical classification of the cerebral amyloid and the systemic amyloid syndrome showed identity proving the same origin of both. The distribution is indicative of a haematogenic pattern of amyloid deposition in systemic amyloidosis and is different from that in Alzheimer’s, prion, ATTR and cystatin C diseases. It corresponds to areas of the brain with a ”leaky” blood–brain barrier. Additionally, all the cases with AA amyloidosis exhibited an Aβ coreactivity in choroid plexus vessels. In one exceptional case, Aβ reactivity of AA amyloid also occurred outside of the brain.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 37 (1977), S. 75-91 
    ISSN: 0942-0940
    Keywords: Supratentorial astrocytomas ; Recurrences of astrocytomas ; Classification of gliomas ; Recurrence intervals ; Radiotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We report 137 recurrent supratentorial astrocytomas. The primary tumours diagnosed on the basis of a grading system with three stages were 72 astrocytomas I and 65 astrocytomas II. In the first group 14% of the recurrences were not changed, 55.5% became astrocytomas II, and 30.5% became glioblastomas. In the second group 55.4% were unchanged, and 44.6% became glioblastomas. The postoperative intervals until reintervention or death were statistically examined. It seems that the recurrence time chiefly depends on the nature of the primary tumour. The transformation of an astrocytoma I to a glioblastoma takes longer than the transformation of an astrocytoma II into a glioblastoma. In about two thirds of all astrocytomas an increase of malignancy is to be expected. From the histological picture it is not possible in an individual case to predict the likelihood or speed of malignant change. With regard to the effect of irradiation the authors conclude that radiotherapy most probably does not produce malignancy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-0533
    Keywords: Immunohistochemistry ; Brain tumors ; Proliferation kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The monoclonal antibody (mAb) Ki-67 is a marker for the growth fraction (GF) of tumor cells. The exact relationship between the Ki-67 labeling index (LI) and the conventional diagnostic criterion of the proliferative activity of brain tumors, the mitotic index (MI), is unknown except for some general references. On serial frozen sections Ki-67 LI and MI were determined in nearly identical areas of 32 glioblastomas, 20 grade III astrocytomas, 21 grade II astrocytomas and 20 selected cases of meningioma. The data not only clearly showed different median values of LI and MI for the various malignancy grades, but also similar regression coefficients for each glioma type. A non-linear relationship between the two indices was found for all glioma cases with high significance and high correlation coefficient; (LI)=5.6 (MI)0.59. This results from differing intermitotic cycle times, the variability of which can be estimated from the data given.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-0533
    Keywords: Natural killer cells ; Immunohistochemistry ; Leu-19 antigen ; Brain tumors ; Neuroendocrine cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Leu-19 antigen is a 200–220 kDa surface glycoprotein, initially detected on natural killer (NK) cells exhibiting non-major histocompatibility complex-restricted cytotoxity. Using a monoclonal antibody (mAb) directed against the Leu-19 molecule, we were unable to identify NK cells immunohistologically in cryostat sections of neuroectodermal tumors. Instead, mAb Leu-19 cross-reacted with the surfaces of the tumor cells, except for melanomas. It stained mesodermal tumor cells less intensely and did not stain those of carcinoma metastases. In three plasmocytomas, cells were observed, most likely NK cells, which extend Leu-19-positive cell processes towards to the unstained tumor cells. Furthermore, the Leu-19 antigen was identified on physiological tissues, especially on all neuroendocrine cells analyzed. The cross-reactions observed with Leu-19 mAb were confirmed using mAb NKH-1, which is also directed against the Leu-19 molecule. Thus, the expression of Leu-19 on neuroectodermal cells is another example of antigen sharing between specialized immune cells and the nervous system.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 62 (1983), S. 15-23 
    ISSN: 1432-0533
    Keywords: Brain death ; Ischemic neuronal alterations ; Brain stem ; Meningoencephalitic reaction ; Reperfusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The varying cell picture of the brain in brain death is impressive. Some authors have interpreted this cell picture as a result of intravital autolysis and others as necrosis, at which the maturation time obviously plays an important part. The following time-dependent cerebral changes were established on the basis of an evaluation of 190 brain death cases: (1) neuronal necroses that arise at different rates within the cerebral cortex and the lower brain stem; (2) a hemorrhagic-meningoencephalitic reaction that occurs exclusively at least 4 days after brain death or hemorrhages alone after intervals of at least 48 h; and (3) a washed-out tissue picture. The alterations in the spinal border zone of the total infarction, like in the brain itself, increase rapidly after 48 h. The regular onset of inflammatory alterations after long brain death intervals can only be explained by partial recirculation due to a decline of the high intracranial pressure. The hermorrhages and increasing necroses in some cases with longer intervals therefore are likewise evidence of a not entirely complete cerebral ischemia in spite of an angiographically demonstrable circulatory arrest.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 100 (2000), S. 709-711 
    ISSN: 1432-0533
    Keywords: Key words Multiple sclerosis ; Aλ amyloid ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In rare multiple sclerosis cases amyloid is deposited in demyelinated plaques. In one such case amyloid was examined immunohistochemically with a panel of antibodies directed against different amyloid types. The amyloid was classified as the Aλ type produced by a local monoclonal B cell population.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 0942-0940
    Keywords: Supratentorial oligodendrogliomas ; Recurrences of oligodendrogliomas ; Classification of gliomas ; Recurrence intervals ; Radiotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary On the basis of a three stage grading system we report 23 stage one recurrent oligodendrogliomas (O 1), and 29 stage two recurrent oligodendrogliomas (O 2). In the O 1 group after the first interval 15 became O 2 and 2 became glioblastomas. Twenty tumours of the O 2 group after the first interval were not changed, three became oligodendroglioma-astrocytomas stage 2, and six became glioblastomas. The time relation for the recurrent phase in the primary O 1 group is calculated as 42 months, and in the primary O 2 group as 22 months, but this is without significance. For the development of malignancy, especially for the change to glioblastoma, a prominent participation by transformed local astrocytes seems to be essential. Postoperative irradiation most probably does not favour malignant change. A prolongation of the expectation of life by radiotherapy is not noticed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...