MUSK and myasthenia gravis: For example, as concluded in the International Consensus Guidance on the Management of Myasthenia Gravis, PLEX may be more effective than IVIg in MuSK-positive MG and the efficacy of IVIg is less certain in milder MG or ocular MG (Prytuła et al. 2015; Sanders et al. 2016).