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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Histopathology 47 (2005), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aims : To describe the spectrum of histopathological features encountered in children with chronic granulomatous disease (CGD) at a specialist centre.Methods and results : The histopathological findings of 88 surgical pathology requests from a range of organ systems including upper and lower gastrointestinal tract biopsy series, liver, bladder, bone, lung, skin, soft tissue, bone marrow and lymph node biopsy specimens, in 32 patients aged 4 months to 18 years (median 7 years) with CGD were reviewed. In most tissues the features were those of active chronic inflammation, with or without abscess or granuloma formation, often associated with fungal infection. In some tissues, more characteristic findings were identified, including the presence of pigmented macrophages, especially in hepatic sinusoids and colonic mucosa, where active chronic eosinophil predominant colitis was also observed.Conclusions : Chronic granulomatous disease may present to histopathologists in a wide range of tissue specimens most often demonstrating features of active chronic inflammation with or without granuloma formation. The presence of numerous pigmented macrophages in association with such inflammation should raise suspicion of the diagnosis. In addition, diffuse granulomatous inflammation of the lung and hepatic abscess formation should be regarded as suggestive of the diagnosis.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Histopathology 46 (2005), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aims : To investigate the cause of grossly elongated villi in four children presenting with obstruction due to a novel form of eosinophilic gastroenteropathy in which there was profound hyperplasia of the intestinal villi with grossly increased villous/crypt ratio and prominent mucosal eosinophilia. Increased eosinophils were also present in the muscularis propria and submucosa. All had intermittent diarrhoea and signs of a protein-losing enteropathy.Methods and results : The cause of the grossly elongated villi was investigated by studying enterocyte proliferation (Ki67), survival factors (bcl-2) and apoptosis (TUNEL) in these patients (n = 4) and normal (jejunum n = 6, ileum n = 6) and disease (n = 6) controls. The most remarkable finding was that apoptotic enterocytes were undetectable in the elongated villi.Conclusions : It seems likely that a defect in the regulation of apoptosis of the epithelium occurs which could explain the remarkable hyperplasia of the villi seen.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Science Ltd
    Histopathology 39 (2001), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Histopathology 33 (1998), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aim: The aetiology of idiopathic megarectum and idiopathic megacolon is unknown. We postulated that biochemical or ultrastructural abnormalities may be pathophysiologically important, as has been observed in patients with chronic idiopathic intestinal pseudo-obstruction.〈section xml:id="abs1-1"〉〈title type="main"〉Methods and resultsResection specimens from five patients with idiopathic megarectum or megacolon were processed for paraffin wax-embedded tissue histology (haematoxylin and eosin, Gomori trichrome and picrosirius stains, acid phosphatase activity and periodic acid–Schiff staining), and frozen tissue for histochemistry and electron microscopy. The antibodies used in the immunohistochemistry were to myosin light chain kinase, smooth muscle myosin, alpha and beta actins, filamin, tropomyosin, phosphorylated and de-phosphorylated neurofilaments and N-CAM. Variable hypertrophy of the muscularis mucosae and externa, no atrophy, and a variable nerve density decrease in longitudinal muscle and increase in the lamina propria was seen. In one patient beta actin and myosin light chain kinase immunoreactivity was reduced.〈section xml:id="abs1-2"〉〈title type="main"〉ConclusionVariable changes in innervation, and an abnormal contractile protein immunoreactivity pattern in one patient, may be of pathogenic importance. These clinically homogeneous conditions are likely to be due to a range of underlying pathogenic abnormalities. A search for further specific biochemical abnormalities is justified.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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