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Related Experiment Videos

Amphiphysin autoimmunity: paraneoplastic accompaniments.

Sean J Pittock1, Claudia F Lucchinetti, Joseph E Parisi

  • 1Department of Neurology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.

Annals of Neurology
|June 29, 2005
PubMed
Summary
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Amphiphysin-IgG autoantibodies are linked to various cancers and neurological disorders, including stiff-man phenomena. Co-occurring autoantibodies can predict cancer type and explain neurological symptoms.

Area of Science:

  • Neuroimmunology
  • Oncology

Background:

  • Paraneoplastic autoantibodies are crucial biomarkers for detecting underlying cancers associated with neurological dysfunction.
  • Amphiphysin-IgG is a specific autoantibody implicated in paraneoplastic syndromes.

Observation:

  • Amphiphysin-IgG was found in 71 out of 120,000 patients screened for paraneoplastic autoantibodies.
  • Cancer was detected in 50 patients (79%) with amphiphysin-IgG, primarily breast and small-cell lung cancer.
  • Neurological symptoms included neuropathy, encephalopathy, myelopathy, stiff-man phenomena, and cerebellar syndrome.

Findings:

  • Coexisting autoantibodies were present in 74% of patients, correlating with specific neoplasms and neurological manifestations.
  • Patients with isolated amphiphysin-IgG were more likely women with breast cancer and presented with myelopathy or stiff-man phenomena.

Related Experiment Videos

  • Stiff-man phenomena were observed in a minority of patients, with distinct prevalence between sexes and cancer types.

    • Implications:

    • Amphiphysin-IgG serology aids in identifying paraneoplastic syndromes and associated cancers.
    • Understanding coexisting autoantibodies refines the diagnosis and prediction of neurological complications.
    • This research highlights the importance of comprehensive autoantibody profiling in paraneoplastic neurological disorders.