Subtypes of CTCL were as follows: mycosis fungoides (MF) in 15 cases; primary cutaneous peripheral T‐cell lymphoma in 6 cases; primary cutaneous anaplastic large‐cell lymphoma in 4 cases; CD30+ lymphoproliferative disorders in 2 cases; and NKT cell lymphoma in 1 case. Here, TNFRSF8 is linked to mycosis fungoides.