Bilateral hemidiaphragm atrophy and electrical myotonia in anti‐muscle specific tyrosine kinase myasthenia gravis

The data that support the findings of this study are available from the corresponding author upon reasonable request. VIDEO S1. Left hemidiaphragm atrophy and impaired thickening in anti-muscle-specific kinase positive myasthenia gravis (MuSK-MG). The left hemidiaphragm is visualized with a 7–15 MHz linear array ultrasound transducer (Terason uSMART 3300, Burlington, MA) at end-expiration and at maximal inspiration. At the beginning of the video, the patient attempts a deep breath, then relaxes, before attempting maximal inspiration a second time. The atrophic and hyperechoic left hemidiaphragm thickens minimally on both attempts at maximal inspiration. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.