Alcian-PAS positive granules in mesothelioma and mesothelial cells.
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Biomedical subjects
Publications and source records attributed to F Huth.
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Whereas the histopathologic picture of the synovial membrane in rheumatoid arthritis varies widely and that in osteoarthritis displays a small range of changes, light- and transmission electron microscopic studies of synovial sections from both disease entities complement each other and assist reciprocally to corroborate the observed changes. Beyond that comparative survey of the ascertained histopathologic features and their correlation with clinical observations disclose that a study of a larger material of specimens permits with some limitations to infer the nature of the joint disease.
The results after intraperitoneal injection of fibrous and granular dusts in rats suggest, that the fibrous shape of asbestos is the cause of its cancerogenicity. Fibrous dusts other than asbestos (for example glass fibers) may induce tumours, when their diameters are like that of asbestos and the fibres are invariable in tissue. It is supposed, that a fibre with a diameter less than 1 mum and a length greater than 3 mum has a cancerogenic effect. The interpretation of the experimental results considering the cancerogenesis in humans is discussed, especially concerning the effect of fibrous glass.
The similarity of the histopathologic changes in posttraumatic synovitis and osteoarthritis suggests that similar etiologic agents, possibly macro- and microtraumata, were pathogenetic factors in common.