CCR4 mutations associated with superior outcome of adult T-cell leukemia/lymphoma under mogamulizumab treatment

TO THE EDITOR: Adult T-cell leukemia/lymphoma (ATL) is caused by human T-cell lymphotropic virus type 1.[1][1][⇓][2]-[3][3] Patients, especially those with an aggressive variant (acute, lymphoma, and unfavorable chronic subtypes),[4][4],[5][5] have an extremely poor prognosis.[1][1][⇓][2][⇓][