Abstract: A 77-year-old male presented with skin mass for 1 month. Biopsy showed that the epidermis became thinner, a large number of lymphoid cells infiltrated throughout the dermis, and some of lymphoid cells were present in the epidermis, some cells had large cell bodies, along with the spindle cells. Diagnosis of extranodal cutaneous NK/T cell lymphoma was made. The patient was admitted to the oncology department, and treated with P-Gemox regimen.