CD8A and synovial sarcoma: In contrast, the detection of CD 158K/KIR3DL2 (a killer immunoglobulin-like receptor usually expressed by some circulating T CD8+ lymphocytes, NK cells, and recently some reports suggested that it might be expressed by some subsets of CD4+ T cells) transcripts using RT-PCR was significantly overexpressed in SS, in comparison with EID, and may be used as a diagnosis marker even in the early stages of SS [67].