ACHE and myasthenia gravis: However, we provided evidence of positivity for EBV markers also in thymoma from MG patients who had been treated only with acetylcholinesterase inhibitors [MG (+) T9, 15, 20, 23, 25] (Tables 1 and 2); moreover, no difference in EBV DNA load and EBER1 levels was observed between corticosteroids-treated and naïve patients, indicating that enrichment of EBV-harboring B cells in MG-associated thymomas is not strictly linked to the immunosuppressive therapy, as also observed in EBV-positive hyperplastic MG thymuses [24, 25].