I was recently diagnosed with Synovial Sarcoma. I had one tumor in my left lung and I have a large tumor in my mediastinum (near my heart). The doctors are trying to determine a treatment plan to remove the large tumor. The surgeon who removed the small tumor said that he would not operate on me to remove the larger tumor because the surgery would be too risky. I hope your niece get better with the treatments she is taking. I am in a waiting stage. I don't know if they are going to operate or give me treatments first. It took them three months to determine what type of cancer I had. Blessings to you and your family.