A Diagnostic Dilemma: Normal Repetitive Nerve Stimulation in Lambert-Eaton Myasthenic Syndrome

It is important for the diagnosis of Lambert-Eaton myasthenic syndrome (LEMS) to confirm incremental response at high-rate stimulation or after brief exercise in repetitive nerve (RNS) test. Therefore, it may be difficult diagnose LEMS if RNS test normal initially. We report a patient with whose was delayed due findings. believe that anti-P/Q-type voltage-gated calcium channel antibody testing crucial LEMS.