MUSK and myasthenia gravis: Anti-ganglioside antibodies (including anti-GQ1b) were negative, as were markers for myasthenia gravis (AChR, MuSK) and paraneoplastic syndromes (Hu, Ri, Yo, Ma2, CRMP5, Titin, Sox1, Zic4, Tr, Recoverin, VGCC antibodies) that formed part of our differential (see Table 2).