SPEN and Miyoshi myopathy: Cox analysis for each of the 8 mutated genes whose RNA expression was confirmed across all studies showed trends of mutations in RAC1 in MM with worse prognosis (HR = 2.1, 95CI 0.66–6.63, log-rank p = 0.07), whereas mutations in SPEN showed trends of mutations with better prognosis (HR = 0.50, range 0.27–0.93, log-rank p = 0.09) (Figure 7).