My friend had an infected tooth which was removed showing an infection in left jawbone. A biopsy indicated a rare bone cancer and lymph glands were removed at time of biopsy. Her jawbone was removed and a titanium plate inserted. Cancer moved into her cheek in only 48 hours. Doctors removed 95% of cancer but couldn't remove all because she would have had a hole in her jaw. She was told there were only 40 known cases of this rare cancer and she was #41. What is this cancer?