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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 13 (1988), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In this study we investigated the splenic microvascular architecture in hairy cell leukaemia, in order to provide a morphological basis for the haemodynamic modifications occurring in the disease. When compared with controls, the four leukaemic spleens examined showed a set of changes involving both the arterial and the venous system. A real increase in the absolute volume, surface and length of pulp arterial vessels was present. This increase was not so great as the enlargement of the spleen, thus resulting in a reduced density of distribution of arterial vessels in the infiltrated pulp. Enlargement of pulp cords and sinuses was also present: the pulp cord enlargement was apparent in the unit volume, which resulted in a disproportionately higher increase of the absolute volume, compared with that of sinuses. The sinus–cordal rearrangement and, particularly, the increase in the volume of pulp cords may cause a slowing down of blood cell circulation with resultant increased phagocytosis and hypersplenism. Moreover, it is suggested that the changes observed in the arterial bed of the spleen in hairy cell leukaemia involve both a reduced blood supply per unit volume of splenic pulp and a more marked conditioning of blood cells prior to their screening by cordal macrophages.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 37 (1981), S. 595-597 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the juxtamedullary cortex of normal human kidney the existence of arteriovenous anastomotic channels is demonstrated by means of microscopic observation. A clear arteriovenous anastomosis occurring at the level of an afferent arteriole is also presented.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2307
    Keywords: Bile ducts, intrahepatic ; Hodgkin's disease ; Liver
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The authors have investigated the behaviour of the small biliary passages in the liver biopsies of six patients suffering from untreated Hodgkin's disease with hepatic localization. No obstruction of the major bile ducts was demonstrated in any patient. Three of the patients were anicteric, while the three others presented with jaundice. In the first three cases typical Hodgkin's granulation tissue appears to be limited to portal tracts and collagen reaction is virtually absent. The three cases with cholestasis showed granulomatous tissue associated with heavy connective tissue rearrangement invading and dissociating the lobular structure. They also show a conspicuous bile-duct proliferation, which is not observed in the three anicteric patients. In these latter cases, however, the small bile ducts running within or near the granulomatous tissue present various morphologic changes, including basal membrane thickening, dilation or constriction of the lumen and alterations of the biliary epithelial lining. Complete disappearance of the bile duct may occur.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 424 (1994), S. 165-168 
    ISSN: 1432-2307
    Keywords: Normal human prostate ; Endocrine cells ; Morphometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A morphometric analysis was performed to obtain quantitative data on age-related changes in prostatic endocrine cell (PrEC) density. Sixty prostates from subjects aged 14–74 years were studied with a semi-automatic image analysis system (ASM 68K, Leitz) applied to sections immunostained for chromogranin A-reactive cells. The highest density of PrECs (0.366 cells/mm of epithelial length) was found in the 25–54 year age group, which was significantly different from that found in prostates of the younger (0.311 cells/mm) and the older (0.261 cells/mm) age groups. The data probably reflect the higher incidence of incompletely developed glandular units in the younger group and the formation of new alveoli related to the usual glandular hyperplasia that occurs with increasing age in the older group.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Molecular and cellular biochemistry 12 (1976), S. 67-71 
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary Chromatin fractions (DNA, histones and nonhistone chromosomal proteins NHCP) have been isolated from human peripheral B and T lymphocytes using different methods and analyzed in order to identify their lipid content. While DNA and histone fractions do not reveal the presence of lipids, a 2% of phospholipids is present in the NHCP fraction. The phospholipids associated with NHCP present a constant relative ratio among sphingomyelin, phosphatidyl-choline and phosphatidyl-ethanolamine both in B and T lymphocytes, whichever are the extraction procedures employed. These findings are related to the possible derepressive role of phospholipids on DNA-dependent RNA synthesis.
    Type of Medium: Electronic Resource
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