Lambert-Eaton Syndrome

Alternate Terms:
  • Myasthenic Syndrome
  • LEMS
  • Eaton-Lambert Syndrome
 Begin Learning with Healthy Advice:
Autoimmune Disease
Lambert-Eaton Myasthenic Syndrome



Lambert-Eaton Syndrome Definition by Healthwise:

Lambert-Eaton syndrome

Lambert-Eaton syndrome (also called Eaton-Lambert syndrome) is a very rare condition in which a person's immune system attacks nerve tissues it mistakenly identifies as invading organisms. As a result, electrical signals do not travel between nerves and muscles as they should, which typically causes weakness in the upper arm and thigh muscles.

Other symptoms may include a dry mouth, muscle pain, vision problems, and droopy eyelids (ptosis). Men with Lambert-Eaton syndrome may also be unable to achieve or maintain an erection.

Certain forms of cancer can sometimes trigger the development of Lambert-Eaton syndrome.

Author: Monica Rhodes
Medical Review: Anne C. Poinier, MD - Internal Medicine
Colin Chalk, MD, CM, FRCPC - Neurology
Last Updated: July 29, 2008

healthwise logo © 1995-2012 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.

This information does not replace the advice of a doctor. Healthwise discalims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use.