The exact cause of fibrohistiocytic sarcoma is not known yet. Like many sarcoma types, it likely arises from a combination of genetic predisposition and environmental factors.
You may not spot visible signs of fibrohistiocytic sarcoma at its initial stage. Most often, a painless lump or swelling in your body can be the first sign of soft tissue sarcoma.
The tumor in the affected area usually stays undetected until it is large enough to compress neighboring tissue. Thus, causing pain or swelling in the affected part of your body.
As the tumor grows, it may cause:
- A noticeable lump or swelling.
- Pain if the growth presses on nerves or muscles.
It is important to inform your doctor about the duration and frequency of symptoms to help identify the cause of the problem.