CALR and synovial sarcoma: The vascular injury may be related to the presence of antibodies most commonly, but not limited to, SS or a related profile of autoantibodies including antinuclear antibody (ANA), extractable nuclear antigen antibodies (SSA/SSB), rheumatoid factor (RF), anticardiolipin antibodies (ACA), cryoglobulins, and anti-double-stranded DNA antibody (A-ds DNA) [4] (Table 1).