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Chemotherapy-induced parkinsonism responsive to levodopa: an underrecognized entity
Cathy Chuang1, Anne Constantino1, Casilda Balmaceda1
1The Neurological Institute, Columbia-Presbyterian Medical Center, New York, New York, USA.
Summary
Cancer treatment can cause rare neurological side effects like parkinsonism. This treatable condition, seen in three patients after chemotherapy, responded well to levodopa, suggesting it may be underdiagnosed.
Area of Science:
- Neurology
- Oncology
- Neurotoxicology
Background:
- Parkinsonism as a neurological complication of cancer treatment is rare.
- Clinical features and prevalence of this syndrome are largely unknown.
- Existing literature consists primarily of individual case reports.
Observation:
- Three patients developed parkinsonism after receiving various chemotherapeutic agents over six months.
- Parkinsonism was severe in two patients, impacting postural reflexes, speech, and swallowing.
- All three patients experienced dramatic improvement with levodopa treatment.
Findings:
- Chemotherapy-induced parkinsonism is a treatable neurological complication.
- Levodopa is an effective treatment for this condition.
- Symptoms of parkinsonism improved or resolved spontaneously over several months.
Implications:
- This complication of cancer therapy may be underappreciated.
- Early recognition and treatment with levodopa can significantly improve patient outcomes.
- Further research is needed to understand the prevalence and mechanisms of chemotherapy-induced parkinsonism.