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Reversible man-in-the-barrel syndrome in myasthenia gravis.


ABSTRACT: Man-in-the-barrel syndrome (MBS) is an uncommon presentation due to bilateral, predominantly proximal muscle weakness that has not been described to be associated with myasthenia gravis. We describe a case of myasthenia gravis presenting as MBS. Additionally, he had significant wasting of the deltoids bilaterally with fibrillations on electromyography (EMG) at rest and brief duration (3-6 ms) bi/triphasic motor unit potentials (MUPs) on submaximal effort apart from a decremental response on repetitive nerve stimulation (RNS) at 2 Hz. While electrophysiology is an important tool in the diagnosis of myasthenia gravis, pathological EMG patterns do not exclude the diagnosis of myasthenia gravis.

SUBMITTER: Shah PA 

PROVIDER: S-EPMC4782563 | biostudies-literature | 2016 Jan-Mar

REPOSITORIES: biostudies-literature

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Reversible man-in-the-barrel syndrome in myasthenia gravis.

Shah Poornima A PA   Wadia Pettarusp Murzban PM  

Annals of Indian Academy of Neurology 20160101 1


Man-in-the-barrel syndrome (MBS) is an uncommon presentation due to bilateral, predominantly proximal muscle weakness that has not been described to be associated with myasthenia gravis. We describe a case of myasthenia gravis presenting as MBS. Additionally, he had significant wasting of the deltoids bilaterally with fibrillations on electromyography (EMG) at rest and brief duration (3-6 ms) bi/triphasic motor unit potentials (MUPs) on submaximal effort apart from a decremental response on repe  ...[more]

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