In terms of the present World Health Organization (WHO)-defined categories, our case would best fit into SPTCL because of histology and the presence of major alpha-beta T-cell phenotype (TCRβF1+, CD8+, granzyme B+, perforin +, TIA1+, CD56-, TCR-γ-). The gene discussed is PRF1; the disease is subcutaneous panniculitis-like T-cell lymphoma.