Synovial sarcoma is one of the rarest types of cancer. This type of soft tissue sarcoma can arise almost anywhere in the body, including the joints. Synovial sarcoma most commonly occurs in the extremities, particularly in the thighs, knees, feet and forearms. However, it also can occur in the head, neck and trunk.

We spoke with Dejka M. Araujo, M.D., and sarcoma research intern Michelle G. Yeagley to learn more about diagnosis...