MUSK and myasthenia gravis: The efficacy of rituximab is more evident in MG with antibodies to muscle-specific tyrosine kinase (MuSK Ab+) compared to those with antibodies to acetylcholine receptor (AChR Ab+), with 70–89% achieving minimal manifestation status (MMS) or better in MuSK Ab+ MG versus with 30–47% in AChR Ab+ MG and remission rate of 47% versus 16%, respectively [140,141,142].