CD30 is a member of the tumor necrosis factor receptor (TNFR) superfamily, expressed not only in Hodgkin's lymphoma but also in other haematological diseases such as anaplastic large cell lymphomas, cutaneous and peripheral T-cell lymphomas, adult T-cell leukemia/lymphoma and diffuse large B-cell lymphomas. Here, TNFRSF8 is linked to peripheral T-cell lymphoma, not otherwise specified.