Pseudomyopathic Changes in Needle Electromyography in Lambert-Eaton Myasthenic Syndrome
Joint Authors
Bokuda, Kota
Koide, Reiji
Komatsu, Teppei
Shimizu, Toshio
Komori, Tetsuo
Source
Case Reports in Neurological Medicine
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-2, 2 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-07-18
Country of Publication
Egypt
No. of Pages
2
Main Subjects
Abstract EN
Lambert-Eaton myasthenic syndrome (LEMS) is a rare presynaptic disorder of the neuromuscular junction in association with cancer and subsequently in cases in which no neoplasm has been detected (O’Neill et al., 1988).
The diagnosis of LEMS is based on the combination of fluctuating muscle weakness, diminished or absent reflexes, and a more than 60% increment of compound muscle action potential (CMAP) amplitude after brief exercise or 50 Hz stimulation for 1 s in a repetitive nerve stimulation (RNS) test (Oh et al., 2005).
On the other hand, needle electromyography (EMG) findings related to LEMS have not been well described.
Here, we report a case of LEMS, which showed apparent myopathic changes in needle EMG findings.
Furthermore, we retrospectively examined the needle EMG findings in 8 patients with LEMS.
In six of the 8 patients, the EMG findings showed myopathy-like findings.
Although the findings of needle EMG indicated myopathic changes at a glance, the motor unit potential (MUP) returned to normal after a sustained strong muscle contraction.
We propose the name “pseudomyopathic changes” for this phenomenon.
American Psychological Association (APA)
Komatsu, Teppei& Bokuda, Kota& Shimizu, Toshio& Komori, Tetsuo& Koide, Reiji. 2013. Pseudomyopathic Changes in Needle Electromyography in Lambert-Eaton Myasthenic Syndrome. Case Reports in Neurological Medicine،Vol. 2013, no. 2013, pp.1-2.
https://search.emarefa.net/detail/BIM-466538
Modern Language Association (MLA)
Komatsu, Teppei…[et al.]. Pseudomyopathic Changes in Needle Electromyography in Lambert-Eaton Myasthenic Syndrome. Case Reports in Neurological Medicine No. 2013 (2013), pp.1-2.
https://search.emarefa.net/detail/BIM-466538
American Medical Association (AMA)
Komatsu, Teppei& Bokuda, Kota& Shimizu, Toshio& Komori, Tetsuo& Koide, Reiji. Pseudomyopathic Changes in Needle Electromyography in Lambert-Eaton Myasthenic Syndrome. Case Reports in Neurological Medicine. 2013. Vol. 2013, no. 2013, pp.1-2.
https://search.emarefa.net/detail/BIM-466538
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-466538