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Pyramidal tract deficits and polyneuropathy in hyperthyroidism, Combination clinically mimicking amyotrophic lateral
The American Journal of Medicine
|June 1, 1985
Summary
This case study highlights a rare concurrence of hyperthyroidism-associated polyneuropathy and pyramidal tract dysfunction. Effective radioiodine therapy resolved neurological symptoms, challenging initial diagnoses like amyotrophic lateral sclerosis.
Area of Science:
- Neurology
- Endocrinology
Background:
- Generalized weakness, dysphagia, and weight loss can mimic neurodegenerative diseases.
- Hyperthyroidism is a known cause of various neuromuscular disorders.
Observation:
- An elderly male presented with progressive weakness, dysphagia, and significant weight loss over six months.
- Clinical examination revealed motor neuron signs, including atrophy, fasciculations, and hyperreflexia, alongside pseudobulbar speech.
- Electrodiagnostic studies indicated an axonal polyneuropathy, and endocrinologic tests confirmed hyperthyroidism.
Findings:
- The patient exhibited both polyneuropathy and pyramidal tract dysfunction, a previously undescribed concurrence.
- Radioiodine therapy for hyperthyroidism led to a complete resolution of neurological symptoms and signs within seven months.
Implications:
- This case underscores the importance of considering endocrine disorders, particularly hyperthyroidism, in the differential diagnosis of motor neuron diseases.
- Early diagnosis and treatment of hyperthyroidism can lead to significant neurological recovery, preventing misdiagnosis of conditions like amyotrophic lateral sclerosis.