TTN and myasthenia gravis: Of note, among the two patients with MG, one 68-year-old male patient who was suspected to have a thymoma prior to surgery showed high anti-titin and low anti-acetylcholine receptor (AChR) autoantibody titers, i.e., a spectrum of findings that is characteristic of “late-onset MG” (LOMG) in non-thymoma patients.