Soft tissue sarcoma often doesn't cause symptoms in its early stages. In fact, symptoms of soft tissue sarcoma may not show up until the cancer has grown for some time. There are many types of soft tissue sarcoma and many locations where the cancer can start. Symptoms depend on the location, size, and if the cancer is pushing on other tissues or organs. The most common locations are the legs, arms, and belly (abdomen), but they can be located anywhere there is soft tissue. Some of the more common symptoms of this cancer are:
- A new or growing lump or swelling on the body, which is usually painless.
- Belly pain.
- Vomiting (may be bloody).
- Loss of appetite or feeling full after not eating very much.
- Red or tarry black stool. This could mean there's blood in your stool.
- Tingling or numb sensation (paresthesia) or swelling (edema) in an arm or leg. This is because of compression by the cancer on tissues and organs.