TNFRSF8 and mycosis fungoides: Mycosis fungoides (MF) and Sézary syndrome (SS) are the most common subtypes, which represent about 70–75% of CTCL (2, 3); other frequent types include primary cutaneous CD30+ T-cell lymphoproliferative disorders, adult T-cell leukemia/lymphoma and a portion of peripheral T-cell lymphoma not otherwise specified (PTCL-NOS).