Lambert Eaton myasthenic syndrome (LEMS) is a rare disorder of the neuromuscular junction. The representative clinical triad consists of proximal muscular weakness, areflexia and autonomic dysfunction. The diagnosis is based on the clinical findings confirmed by voltage-gated calcium channels antibody titer and neurophysiology. We present a 69 year old male with prostate adenocarcinoma and 30 years history of smoking, referred for muscle weakness in the lower limbs and difficulty to climb the stairs.


Lambert Eaton myasthenic syndrome, voltage-gated calcium channels, neurophysiology