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ALS - Motor Neuron Disease: Mechanism and Development of New Therapies
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Asymptomatic Lambert-Eaton syndrome.

Eric H Denys1, Vanda A Lennon

  • 1Department of Neurosciences, California Pacific Medical Center, San Francisco, California, USA.

Muscle & Nerve
|November 22, 2013
PubMed
Summary
This summary is machine-generated.

This study identified asymptomatic Lambert-Eaton syndrome (LES) in a patient, showing presynaptic disorder markers and P/Q-type voltage-gated calcium channel antibodies. This finding offers new insights into the natural history of LES.

Keywords:
Lambert-Eaton syndromemyasthenic syndromeorgan-specific autoimmunitypernicious anemiavoltage-gated calcium channels

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Area of Science:

  • Neurology
  • Clinical Electrophysiology
  • Autoimmunity

Background:

  • Lambert-Eaton syndrome (LES) is typically described in symptomatic individuals.
  • This case presents incidental electromyographic findings suggestive of LES in an asymptomatic patient.
  • The patient had controlled hypothyroidism and a history of smoking but no weakness or cancer.

Observation:

  • Electrophysiological and serological evaluations were performed.
  • Neuromuscular transmission tests indicated a presynaptic disorder.
  • The patient had autoantibodies specific for P/Q-type voltage-gated calcium channels (VGCC) in serum.

Findings:

  • Asymptomatic LES was identified and persisted for 8 years.
  • P/Q-type VGCC autoantibodies were detected and remained throughout the follow-up period.
  • Markers of thyrogastric autoimmunity were also present.

Implications:

  • This case provides novel insight into the natural history of subclinical LES.
  • Patients with subclinical LES may experience abrupt neuromuscular decompensation when exposed to certain medications.
  • Understanding subclinical LES is crucial for managing neuromuscular disorders and patient safety.