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[Progressive multifocal leukoencephalopathy associated with leukopenia of unknown (iatrogenic?) origin]
M Gómez Beldarrain1, M Pérez-Bas, M Rosell
1Servicio y Cátedra de Neurología, Hospital de Cruces, Facultad de Medicina y Odontología, Universidad del País Vasco-Euskal Herriko Unibersitatea.
Abstract:
Progressive multifocal leukoencephalopathy is a virtually always opportunistic infection of central nervous system caused by papova viruses, which clinically presents with symptoms and signs of involvement of different encephalic levels. We report a case with a double interest: on the one hand, both clinical features and lesions were limited to the brainstem and cerebellum; on the other hand, the disease developed in a previously healthy female in whom laboratory evidence of immunodeficiency of unknown origin was demonstrated. A reason for immunodeficiency was also not found at autopsy, being speculated that it could have been iatrogenically associated with antidepressant drugs.
Insights
Progressive multifocal leukoencephalopathy (PML) is a rare central nervous system infection. This case highlights a unique presentation in a healthy female with unknown immunodeficiency, possibly linked to antidepressant use.
Area of Science:
- Neuroscience
- Infectious Diseases
- Immunology
Background:
- Progressive multifocal leukoencephalopathy (PML) is an opportunistic central nervous system infection caused by papova viruses.
- PML typically presents with widespread neurological symptoms affecting various brain regions.
Observation:
- A rare case of PML is presented in a previously healthy female.
- Clinical symptoms and MRI lesions were uniquely confined to the brainstem and cerebellum.
- The patient exhibited laboratory evidence of unexplained immunodeficiency.
Findings:
- The specific localization of PML to the brainstem and cerebellum is unusual.
- The underlying cause of immunodeficiency remained undetermined, even post-mortem.
- A potential iatrogenic link between antidepressant medications and the observed immunodeficiency was speculated.
Implications:
- This case expands the known clinical spectrum and potential etiologies of PML.
- It underscores the importance of considering PML in unexplained neurological deficits, even in immunocompetent-appearing individuals.
- Further research into drug-induced immunodeficiency and opportunistic infections is warranted.