Compared with the good prognosis group, the poor prognosis group had a higher incidence of mental disorders (p = 0.028), autonomic nervous dysfunction (p = 0.018) and sleep disorders (p = 0.007), anti‐Ma2 (p = 0.039), and less intervention treatment of thymoma (p = 0.012). Here, PNMA2 is linked to sleep disorder.