Soft tissue sarcoma is a type of cancer that develops in the soft tissues of the body, which include muscles, fat, blood vessels, nerves, and connective tissues. This cancer can occur anywhere in the body but is most commonly found in the arms, legs, and trunk. Symptoms may include swelling or a noticeable lump, and it can sometimes be mistaken for a benign growth. Diagnosis typically involves imaging tests like MRI or CT scans and a biopsy to confirm the presence of cancer cells. Treatment options often include surgery to remove the tumor, radiation therapy, and chemotherapy to target any remaining cancer cells. Early detection is crucial for better outcomes.