The cause of smooth muscle sarcoma is not certain. However, researchers believe it is likely a result of genetic predisposition and environmental factors.
The symptoms of smooth muscle sarcoma depend on where the tumor starts in the body. Symptoms may vary with the tumor's location, type, and stage.
You may not feel any symptoms in the early stages, but as it grows and spreads, you may feel lumps or pain. However, some patients may not experience any noticeable symptoms at all.
A painless lump could form where the tumor is growing and eventually cause pain if the mass is pressing on a nerve or muscle. Consult your healthcare provider if you experience pain or any signs of an abnormal lump.