First of all... don't panic yet! The statistics are that adult sarcoma (in all of it's many forms) account for between1 to a little less than 1% of all cancer cases. And since you've not been diagnosed, that's a good thing! It means it's more likely to be any number of things than sarcoma!
That being said, I lost my precious Daddy 1 week and 2 days ago to soft tissue sarcoma. He fought a valiant 3 year fight! His originated in his right thigh and, before it could be removed, grew (in only 4 months) to 13lbs.! I know how scary it is when you don't know what sarcoma is and you read about it on the web! The statistics are so grim and seem hopeless! BUT... there is hope! The most important information I can give you, which no one gave us, is to get to a research center that specializes in only sarcoma! That is essential to your diagnosis, treatment, and prognosis! Even if your tests come back fine from this doctor, get an opinion from someone who KNOWS sarcoma! My Daddy was misdiagnosed 3 times in the first 4 months and that is precious, valuable time wasted if you do have sarcoma! After your tests are done, let me know how it goes! I am praying for good news! But if it is sarcoma, you are not alone! I have spent the last 3 years tirelessly researching this cancer and I will help you in any way I can! Best of luck and may God bless you!
Julie