| | In 1999, approximately 7,800 new soft tissue sarcomas will be diagnosed in the United States, according to the American Cancer Society. Of these, 4,200 cases will be diagnosed in men, while 3,600 cases will be diagnosed in women.
Soft tissue sarcomas (STS) develop from the tissues that support and connect the body, including fat, muscle, nerve, blood vessels, connective tissue or joints (synovial tissue). Many are benign (non-cancerous). Soft tissue sarcomas can develop anywhere in the body, but appear most frequently in the extremities (arms, legs, hands and feet) and retroperitoneum (back of the abdominal cavity). They occur less frequently in the head and neck, or in the abdominal cavity or chest.
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