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  • 1
    ISSN: 1432-2161
    Keywords: Magnetization transfer contrast ; Cartilage ; MTC-subtraction ; Collagen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Human articular cartilage from 16 cadaveric or amputated knees was studied using standard magnetic resonance imaging (MRI), on-resonance magnetization transfer contrast (MTC) and MTC-subtraction MRI. Results were compared with subsequent macroscopic and histopathological findings. MTC-subtraction and T2-weighted spin-echo images visualized cartilaginous surface defects with high sensitivity and specificity. MTC and T2-weighted spin-echo images revealed intra-cartilaginous signal loss without surface defects in 80% of the cases, corresponding to an increased collagen concentration. It is concluded that MTC is sensitive to early cartilage degeneration and MTC-subtraction can be helpful in detecting cartilage defects.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2307
    Keywords: Key words Adenovirus ; Liver pathology ; Electron microscopy ; AIDS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Adenovirus-induced liver necrosis is rare. Before the era of AIDS (acquired immunodeficiency syndrome) this entity was seen predominantly in infants suffering from inborn immunodeficiency syndromes or from iatrogenic immunosuppression because of bone marrow or liver transplantation. Here, we report a case of a 30-year-old woman with AIDS who developed fever and rapidly progressing liver failure. A frozen section from a needle biopsy of the liver allowed a quick diagnosis of viral liver necrosis. The light-microscopic and electron microscopic aspects were typical of adenovirus infection and should be known to the surgical pathologist. The diagnosis was confirmed by immunohistochemistry and DNA hybridization analysis.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1439-0973
    Keywords: Key Words Adenovirus ; Pneumocystis carinii ; HIV ; AIDS ; Pneumonia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Background: Adenovirus infections are common in immunocomproised hosts. However, pulmonary adenovirus infections rarely cause significant morbidity in HIV-infected patients. Patient: Here we described a 27-year-old man with AIDS who presented with tachypnea, hypoxemia and an infiltrate in the upper left lobe on chest X-ray. Bronchoscopy was performed and Pneumocystis carinii was detected in brochoalveolar lavage (BAL) fluid. Treatment with cotrimoxazole and prednisone intially resulted in improvement, but after 10 days the patient's clinical condition deteriorated rapidly and he died after 23 days due to respiratory failure. Results: On autopsy histopathologic examination showed abundant “smudge cells,” suggestive of adenoviral infection. Electron microscopy revealed adenovirus-like particles arrayed in a paracrystalline manner. Subsequent immunohistochemistry confirmed the extensive presence of adenovirus in addition to P. carinii. Conclusion: This case demonstrates a pathogenetic role for adenovirus coinfection i P. carinii pneumonia (PCP). Earlier diagnosis, e. g. by PCR analysis of the BAL fluid or transbronchial biopsy, might have led to the consideration of ribavirin treatment.
    Type of Medium: Electronic Resource
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