NFKB1 and synovial sarcoma: NF-κB is ubiquitously expressed in SGs, and the constitutive NF-κB activation observed in primary SS (pSS) is associated with NF-κB release and nuclear translocation of NF-κB, to focal infiltrated lymphocytes and the acinar epithelium of patients with pSS, to regulate the pro-inflammatory gene transcriptions [4].