Just like the survival rate for any type of cancer or disease, it depends on what stage it is in when you find it.  The average five year survival rate for people that found it when it was small and had not spread yet was 90 %.  For those who it had spread throughout their body the five year survival rate dropped to a low 10-15%.  However, recent advances in medicines and treatments in the past five years are sure to raise the survival rate for both categories.  Since the cause of soft tissue sarcoma is unknown it makes it more difficult for doctors and scientists to try to eradicate the disease or come up with prevention methods.

5 Year Survival Rate for Soft Tissue
Sarcoma in the Arms or Legs