Soft Tissue Tumors can appear in muscle, fat, blood vessels, nerves, tendons, and joint linings anywhere in the body. They’re more common than other types of tumors, such as those that develop in the bones, and many are benign. Rarely, though, they may develop as soft tissue sarcomas, which are malignant.
There are many different forms of benign soft tissue tumors, and they don’t all present the same symptoms. If they’re close to the surface of your skin, as with most lipomas, they may appear as a visible lump, though they may appear small or not at all if they’re located in deeper layers of tissue. Additionally, some cause no pain.
There are also many varieties of soft tissue sarcoma which generally present symptoms in a similar manner as their benign counterparts. Some may appear as lumps or cause pain, while others may not present symptoms in their early stages.