Lambert-eaton myasthenic syndrome.

Lambert-Eaton myasthenic syndrome (LEMS) is an autoimmune neuromuscular disorder affecting the presynaptic neuromuscular junction. LEMS is considered to be a rare disease, but its clinical recognition and diagnosis are important due to its high association with underlying lung cancer which may be detected at the very early stages. The onset is insidious and its clinical features are subtle which add to the further delay of diagnosis, between months to years.