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[Progressive multifocal leukoencephalopathy in AIDS]
R H Enting1, P Portegies, P R Algra
1Academisch Medisch Centrum, AIDS-afd. en afd. Neurologie, Amsterdam.
Abstract:
This study was carried out to determine clinical features, abnormalities on CT scan and MRI, and course in patients with HIV-I-related progressive multifocal leukoencephalopathy (PML). There were 14 patients with a presumptive diagnosis of PML among 500 HIV-I infected patients with neurological complaints, examined between September 1982 and May 1991 in the University Medical Centre in Amsterdam by a neurologist. In these 14 patients clinical features, imaging abnormalities and course of the disease were analysed retrospectively. All patients presented with progressive focal neurological abnormalities. Cerebrospinal fluid analysis revealed aspecific abnormalities in 5/13 patients. CT scanning of the brain showed hypodense areas in the white matter, without mass effect and with contrast enhancing in only one patient. MR Imaging of the brain showed high signal intensity areas in white matter and in gray matter (10/13), without mass effect, and with contrast enhancement in two. Specimens for neuropathological examination were obtained from 7 patients; in all these cases the diagnosis of PML was confirmed. In patients with AIDS a presumptive diagnosis of PML can be based on clinical features, brain imaging abnormalities and course. However neuropathological confirmation remains the gold standard. Usually the course in these patients was steadily progressive. Most patients died within one year.
Insights
This study details clinical features and imaging findings of progressive multifocal leukoencephalopathy (PML) in HIV-I patients. Neuropathology confirmed PML, often progressive, with most patients dying within a year.
Area of Science:
- Neurology
- Infectious Diseases
- Radiology
Context:
- Progressive multifocal leukoencephalopathy (PML) is a rare, opportunistic infection affecting the central nervous system.
- Human Immunodeficiency Virus type 1 (HIV-I) infection is a primary risk factor for developing PML.
- Neurological complications in HIV-I patients necessitate accurate diagnostic approaches for conditions like PML.
Purpose:
- To investigate the clinical manifestations, neuroimaging characteristics (CT and MRI), and disease progression in patients with HIV-I-related progressive multifocal leukoencephalopathy (PML).
- To evaluate the diagnostic utility of clinical presentation, cerebrospinal fluid analysis, and neuroimaging in the presumptive diagnosis of PML.
- To establish the correlation between clinical and imaging findings and the confirmed neuropathological diagnosis of PML.
Summary:
- A retrospective analysis of 14 HIV-I infected patients with neurological complaints and a presumptive diagnosis of PML was conducted.
- Clinical features included progressive focal neurological deficits. Cerebrospinal fluid analysis showed nonspecific abnormalities in some patients.
- CT scans revealed hypodense white matter lesions, while MRI showed high signal intensity areas in white and gray matter. Neuropathological examination confirmed PML in 7 patients.
- The study highlights that while clinical and imaging findings can suggest PML in AIDS patients, neuropathological confirmation is definitive.
- The disease course was typically progressive, with a high mortality rate, most patients succumbing within one year.
Impact:
- Provides insights into the clinical and radiological spectrum of HIV-I-related PML, aiding in early recognition.
- Emphasizes the importance of integrating clinical, imaging, and laboratory data for presumptive diagnosis.
- Underscores the critical role of neuropathological confirmation for definitive PML diagnosis in immunocompromised individuals.
- Contributes to understanding the natural history and prognosis of PML in the context of HIV-I infection.