CALR and synovial sarcoma: The patient had a known prior diagnosis of UCTD which was characterized by recurrent aphthous ulcerations, polyarthralgias (without synovitis), 5 years of sicca symptoms (but without anti-Ro/SS-A and anti-La/B antibodies, and with a lip biopsy not supportive of SS), and labs showing low-titer anti-CCP antibodies.