In T cell lymphomas, TOX is highly expressed in mycosis fungoides (MF), precursor T lymphoblastic lymphoma, and angioimmunoblastic T-cell lymphoma (AITL), but it is expressed at a low level in peripheral T-cell lymphoma cell lymphoma (PTCL) and anaplastic large cell lymphoma (ALCL). Here, TOX is linked to anaplastic large cell lymphoma.