We found numerous chemokines to be upregulated in the congenic mice (Table 3), such as Ltb, B-cell activating Cxcl13 and its receptor RANTES (Cxcr5), and T-cell activating Cxcl12 [7,33], which is consistent with our previous findings in SS patients [8]. Here, CXCL12 is linked to synovial sarcoma.