A patient with progressive weakness and cramping of right arm and both legs. Diagnosis: persistent, multifocal, partial conduction blocks (CB) of motor axons outside the common sites of nerve entrapment.

Abstract

A 44-year-old man presented with a 1-year history of progressive muscle weakness and cramping. Neurophysiology study, along with clinical presentation, was diagnostic. The differential diagnosis, diagnostic testing, treatment, and prognosis of this rare disease are discussed.