SPTCL is characterized by the expression of CD3 and CD8 since it is negative for CD4, CD30, CD56, TCRγ/δ, and Epstein-Barr virus, and positive for TCR-βF1.[1,14] Patients with SPTCL are positive for CD2, CD5, and TiA1, with a high Ki-67 index.[7] TCR gene rearrangement was performed as an adjunctive method to assist in the diagnosis of SPTCL for different clonal detections, varying from 50% to 90%.[15] In our case, the specimen testing was performed after approximately 8 months led to a false-negative TCR gene rearrangement. The gene discussed is CD4; the disease is subcutaneous panniculitis-like T-cell lymphoma.