Among thymoma patients (n=9), the frequency of HLA-DQB1 03:03 (33.3% vs 15.9%, P = 0.057), HLA-C 01:02 (27.8% vs 15.9%, P = 0.167), HLA-B*52:01 (5.6% vs 3%, P = 1.0) was higher than that in the normal population, but the difference was not statistically significant. Here, HLA-C is linked to thymoma.