Regarding HLA-C, our analysis yielded similar results with previous studies in Brazil and Japan, which reported a correlation between HLA-C*07 and progression to disease, even though in our case it was associated to ATLL (p = 0.017) and not to HAM/TSP (p = 0.466) [16, 25]. The gene discussed is HLA-C; the disease is adult T-cell leukemia/lymphoma.