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Related Experiment Videos

Colchicine myopathy and neuropathy.

R W Kuncl, G Duncan, D Watson

    The New England Journal of Medicine
    |June 18, 1987
    PubMed
    Summary

    Colchicine can cause neuromuscular toxicity, leading to a myopathy and neuropathy syndrome. This condition, often misdiagnosed, presents with weakness and elevated creatine kinase, resolving after colchicine discontinuation.

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    Area of Science:

    • Neurology
    • Toxicology
    • Rheumatology

    Background:

    • Colchicine, a long-used medication, has unrecognized neuromuscular toxicity.
    • This toxicity can manifest as a distinct myopathy and neuropathy syndrome.

    Observation:

    • Twelve new cases of colchicine-induced myoneuropathy are presented.
    • Patients with gout on standard colchicine doses may develop toxicity due to impaired renal function.
    • Symptoms include proximal muscle weakness and elevated serum creatine kinase levels.

    Findings:

    • Electromyography reveals myopathy with abnormal spontaneous activity in proximal muscles.
    • The myopathy is characterized by vacuolar changes, lysosomes, and autophagic vacuoles.
    • An accompanying mild axonal polyneuropathy is also observed.

    Implications:

    • Colchicine myoneuropathy is frequently misdiagnosed as polymyositis or uremic neuropathy.
    • Accurate diagnosis is crucial to prevent inappropriate treatments.
    • Understanding the pathogenesis involves microtubule disruption and lysosomal interactions.

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