There were no LRP4-Abs-positive patients in our sample, which is similar to that described by Cortés-Vicente et al.14Other reports have shown a highly variable prevalence of the LRP4-Abs MG subtype in different populations, from 1-5% of all patients with MG to 50% of the double-SNMG cases.15, 16, 17. This evidence concerns the gene LRP4 and myasthenia gravis.