Early signs of soft tissue can include a painless lump or swelling. Some sarcomas may not cause any symptoms until they grow and press on neighboring nerves, organs or muscles, at which point they may cause pain, a feeling of fullness or trouble breathing.
Symptoms of bone sarcomas can include pain and/or swelling in an arm or leg, the trunk, the pelvis, or the back. Swelling may or may not feel warm to the touch. Other signs include a limited range of motion in a joint, a fever for no known reason or a bone that breaks from no apparent cause.
These symptoms could be signs of many other medical conditions. Always check with your doctor for a proper diagnosis.