What are the symptoms of synovial sarcoma in the back of knee?

Swelling: Synovia Sarcoma is one of rare forms of sarcoma usually developing in the knee region. It is slow growing often leading to a delay in dx. With incomplete removal recurrence is common. Half of the cases metastasize. The most common symptom is swelling or a mass that may be tender or painful and mistaken for inflammation of the joints, Wide resection essential.