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Progressive multifocal leukoencephalopathy

J O King, D H Hart, J R Sullivan

Clinical and Experimental Neurology

|January 1, 1981

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Progressive multifocal leukoencephalopathy (PML) occurred in three patients undergoing chemotherapy for leukemia and lymphoma. Early diagnosis and brain biopsy are crucial as PML is potentially treatable.

Area of Science:

Neurology
Oncology
Infectious Diseases

Background:

Chemotherapy for hematologic malignancies can increase the risk of opportunistic infections.
Progressive multifocal leukoencephalopathy (PML) is a rare but serious demyelinating disease of the central nervous system.
The incidence of PML in immunocompromised patients may be underestimated.

Observation:

Three cases of PML were observed within a 3-year period at a single hospital.
All affected patients had received chemotherapy for chronic myeloid leukemia, lymphocytic lymphoma, or acute myeloid leukemia.
Patients presented with progressive neurological decline, ultimately leading to death.

Findings:

Routine neurological investigations were insufficient for diagnosis.

Related Experiment Videos

PML was suspected in two cases, but no treatment was initiated.

The observed cases suggest PML may not be as rare as previously thought in this patient population.

Implications:

Consideration of PML should be increased in immunocompromised patients with neurological symptoms.
Brain biopsy should be more readily considered for definitive diagnosis.
Early diagnosis and treatment of PML can potentially improve patient outcomes.