In contrast, however, an investigation by Ohlsson et al. found that although ductal and acinar CD8+ T cell infiltration was present in pSS and sSS labial biopsies, it was not statistically significant compared to non-SS controls and apoptosis of epithelial cells was very rare (less than 1%) in SS [149]. The gene discussed is CD8A; the disease is synovial sarcoma.