You need to get to a hospital that SPECIALIZES in sarcomas...some will claim to be able to treat them, but there are only a few that truly specialize in it and do in depth research. Here are 3 places that have some of the top docs in the world:
Memorial Sloan-Kettering Hospital (NYC)...
Dana Farber in Boston, Mass
MD Anderson in Houston, TX.
If you go to the websites (google them) of these cancer hospitals, you will find dr's names. I have had a lot of luck in getting dr's to respond to emails, and got right in for appts.
Best of Luck to you..Stay strong and be proactive...don't delay.
:)