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  • Title: [Nervous system pathology in AIDS: results of a collaborative autopsy study from Switzerland].
    Author: Lang W, Probst A, Miklossy J, Deruaz JP, Pizzolato GP, Schaffner T, Gessaga E, Kleihues P.
    Journal: Schweiz Rundsch Med Prax; 1990 May 02; 79(18):562-8. PubMed ID: 2187222.
    Abstract:
    Neuropathological lesions were studied in a consecutive autopsy series of 206 cases, comprising 61% of all patients who died of Aids in Switzerland between April 1981 and December 1988. Central nervous system involvement was found in 84% of the patients, and 17% showed multiple concomitant intracerebral lesions. Among the non-viral opportunistic infections, cerebral toxoplasmosis was most frequent (24%), whilst among the viral opportunistic infections, cytomegalovirus (CMV) encephalitis was most frequent (7%). A nodular encephalitis consisting of disseminated microglial nodules without morphological or immunocytochemical evidence of CMV occurred in 13.5% of the patients. The majority of these cases showed evidence of extracerebral CMV infection. Progressive multifocal leukoencephalopathy (PML) was observed in 6% of the patients and was associated with widespread tissue destruction and cyst formation. HIV encephalopathy occurred in 38 patients (18%) and showed two characteristic morphological patterns: progressive diffuse leukoencephalopathy (PDL) and multifocal giant cell encephalitis (MGCE). PDL was observed in 22 patients and was characterized by a diffuse demyelination and gliosis of the white matter with little inflammatory infiltrates and scattered multinucleated giant cells which were immunoreactive to HIV antigens. MGCE was found in 16 patients and was characterized by clusters of macrophages, lymphocytes, and HIV-immunoreactive multi-nucleated giant cells. In our view, PDL and MGCE represent two opposite variants of HIV-induced encephalopathies with numerous intermediate manifestations.
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