Soft tissue sarcoma (STS) is a type of cancerous tumor that can grow in the body’s soft tissues. If it occurs in the thigh, it may feel like a person has a lump in their thigh, though symptoms ...

If you find a lump on your arms, legs, head, or neck, there's a small chance you could have a desmoid tumor. Unlike a fatty tumor that grows under your skin (called a lipoma), this kind of tumor ...