Treatment regimens for ATLL include watchful waiting until the disease progresses, multiagent chemotherapy, Zidovudine (AZT) and interferon-alpha (IFN-ɑ) therapy (AZT/IFN), and allogeneic hematopoietic stem cell transplantation (allo-HSCT). Here, IFNA1 is linked to adult T-cell leukemia/lymphoma.