Acquired neuromyotonia heralding recurrent thymoma in myasthenia gravis.

Abstract in brief

• The text describes a case where a 53-year-old man with myasthenia gravis and a history of thymectomy developed acquired neuromyotonia, which is an autoimmune condition involving involuntary muscle twitching and antibodies against potassium channel proteins.
• The recurrence of a malignant thymoma was detected alongside symptomatic neuromyotonia, and antibody tests confirmed the presence of specific proteins (LGI1 and Caspr2) linked to voltage-gated potassium channels.
• This case emphasizes the importance of checking for thymomas in patients with neuromyotonia or myasthenia gravis, as these conditions often overlap and are part of an autoimmune spectrum.