Published: Sept. 2, 2011
Updated: Sept. 2, 2011
In the early stages, bone and soft tissue sarcomas may show no symptoms at all. Sometimes they appear as a painless lump under the skin that gets bigger over time, especially on an arm or a leg.
In the abdomen or gastrointestinal tract, sarcomas may not cause symptoms until they grow large, when they can cause pain, bleeding, or trouble breathing.
Sarcomas of bone are typically painful and may also appear as a lump.
Learn more about sarcoma: