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[Lasting focal signs in 2 cases of progressive multifocal leukoencephalopathy]
Abstract:
Two cases of progressive multifocal leukoencephalopathy, which occurred without a clinical setting of immune deficiency and developed as a unifocal brain lesion during 14 and 4 months, are reported. The diagnosis was established only by post mortem study in the first case and after five months by a brain biopsy in the second one. The difficulties of an early diagnosis in such cases should be now reduced with CT scan which may show a relatively specific picture, even when there is only one visible lesion.
Insights
Progressive multifocal leukoencephalopathy (PML) can occur without immune deficiency, presenting as a single brain lesion. Early diagnosis is challenging but CT scans may aid detection even with limited lesions.
Area of Science:
- Neurology
- Neurovirology
- Pathology
Background:
- Progressive multifocal leukoencephalopathy (PML) is a rare, often fatal, demyelinating disease of the central nervous system.
- Typically, PML is associated with profound cellular immune deficiency, particularly in conditions like advanced HIV/AIDS or lymphoproliferative disorders.
Observation:
- This report details two cases of PML that developed in the absence of any clinically apparent immune deficiency.
- Both cases presented as a unifocal brain lesion, progressing over 4 and 14 months respectively.
- Diagnosis was delayed, requiring post-mortem examination in one case and brain biopsy after five months in the other.
Findings:
- The study highlights the diagnostic challenges of atypical PML presentations, especially when occurring as a solitary lesion.
- Computed Tomography (CT) scans are identified as a potentially valuable tool for early detection.
- CT imaging may reveal a relatively specific pattern suggestive of PML, even in cases with only a single visible lesion.
Implications:
- These findings suggest that PML should be considered in the differential diagnosis of unifocal brain lesions, even in immunocompetent individuals.
- The utility of CT scans in identifying subtle or unifocal PML lesions could lead to earlier diagnosis and intervention.
- Further research into the pathogenesis and diagnostic markers of PML in non-immunocompromised hosts is warranted.